Advanced Energy Materials

Cover image for Vol. 7 Issue 14

Early View (Online Version of Record published before inclusion in an issue)

Editor-in-Chief: Carolina Novo da Silva, Deputy Editor: Guangchen Xu

Impact Factor: 16.721

ISI Journal Citation Reports © Ranking: 2016: 3/145 (Chemistry Physical); 3/92 (Energy & Fuels); 5/147 (Physics Applied); 5/67 (Physics Condensed Matter); 8/275 (Materials Science Multidisciplinary)

Online ISSN: 1614-6840

Associated Title(s): Advanced Electronic Materials, Advanced Engineering Materials, Advanced Functional Materials, Advanced Healthcare Materials, Advanced Materials, Advanced Materials Interfaces, Advanced Materials Technologies, Advanced Optical Materials, Advanced Science, Energy Technology, Fuel Cells, Particle & Particle Systems Characterization, Small

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  3. 201 - 219
  1. Full Papers

    1. Graphene-Based Organic Electrochemical Capacitors for AC Line Filtering

      Fengyao Chi, Chun Li, Qinqin Zhou, Miao Zhang, Ji Chen, Xiaowen Yu and Gaoquan Shi

      Version of Record online: 8 JUN 2017 | DOI: 10.1002/aenm.201700591

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      An organic electrochemical capacitor (OEC) based on electrochemically reduced less defective graphene oxide exhibits excellent AC line-filtering performance. At 120 Hz, it displays a high areal specific energy density, ultrafast rate capability, and excellent electrochemical stability. These OECs can be connected in series or parallel for practical applications.

  2. Communications

    1. Amphicharge-Storable Pyropolymers Containing Multitiered Nanopores

      Na Rae Kim, Sang Moon Lee, Min Wook Kim, Hyeon Ji Yoon, Won G. Hong, Hae Jin Kim, Hyoung Jin Choi, Hyoung-Joon Jin and Young Soo Yun

      Version of Record online: 8 JUN 2017 | DOI: 10.1002/aenm.201700629

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      Hierarchically nanoporous pyropolymers (HN-PPs) including numerous oxygen and nitrogen heteroatoms are fabricated from polyaniline nanotubes by heating with KOH. HN-PPs exhibit a remarkably high specific capacity of ≈460 mA h g−1, high rate capabilities by ≈30 A g−1, and long-lasting cycling performance, the result of storing amphicharges (Li-ion and anion) through both Faradaic reactions and electrochemical double layer formation.

  3. Full Papers

    1. Enhancing the Regeneration Process of Consumed NaBH4 for Hydrogen Storage

      Liuzhang Ouyang, Wei Chen, Jiangwen Liu, Michael Felderhoff, Hui Wang and Min Zhu

      Version of Record online: 6 JUN 2017 | DOI: 10.1002/aenm.201700299

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      High-energy ball milling method has significantly contributed toward the regeneration of NaBH4 without extra hydrogen, using NaBO2·2H2O and cheap Mg powder as raw materials. The optimal regeneration yield can reach 68.55%. Through controlling the amount of water, NaBH4 hydrolysis reaction can release 6.33 wt% H2 with CoCl2 as catalyst and reproduce NaBO2·2H2O.

  4. Research News

    1. Supramolecular Approaches to Improve the Performance of Ruthenium-Based Water Oxidation Catalysts

      Valentin Kunz, David Schmidt, Merle I. S. Röhr, Roland Mitrić and Frank Würthner

      Version of Record online: 6 JUN 2017 | DOI: 10.1002/aenm.201602939

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      Supramolecular principles can be utilized to enhance the activity of homogeneous ruthenium water oxidation catalysts. Focusing on two different water oxidation mechanisms, recent examples from literature are described where noncovalent forces are exploited to accelerate the rate of water oxidation. Those interactions facilitate the interplay of catalytic centers with substrate water molecules or other catalytic subunits to lower activation barriers.

  5. Full Papers

    1. Dielectric Response: Answer to Many Questions in the Methylammonium Lead Halide Solar Cell Absorbers

      Irina Anusca, Sergejus Balčiūnas, Pascale Gemeiner, Šarūnas Svirskas, Mehmet Sanlialp, Gerhard Lackner, Christian Fettkenhauer, Jaroslavas Belovickis, Vytautas Samulionis, Maksim Ivanov, Brahim Dkhil, Juras Banys, Vladimir V. Shvartsman and Doru C. Lupascu

      Version of Record online: 26 MAY 2017 | DOI: 10.1002/aenm.201700600

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      Charge carrier screening in the methylammonium lead halides is the major mechanism assuring long charge carrier lifetime. The high dielectric response is shown to stem from lattice as well as dipole orientation contributions both acting independently at different frequencies. The resulting screening is more effective than a single mechanism and acts on electronic carriers as well as charged defects.

  6. Communications

    1. Doping-Free Asymmetrical Silicon Heterocontact Achieved by Integrating Conjugated Molecules for High Efficient Solar Cell

      Jiawei Liu, Yujin Ji, Yuqiang Liu, Zhouhui Xia, Yujie Han, Youyong Li and Baoquan Sun

      Version of Record online: 26 MAY 2017 | DOI: 10.1002/aenm.201700311

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      A dopant-free organic/silicon heterocontact for electron and hole selectively collected by [6, 6]-phenyl-C61-butyric acid methyl ester and (3,4-ethylenedioxythiophene):poly(styrenesulfonate) in a solar cell is developed and implemented by a simple solution deposition process at a low temperature (<150 °C), respectively. It is found that the physical distance between organic and silicon plays a key role on their electronic coupling.

  7. Full Papers

    1. A Hybrid Mg2+/Li+ Battery Based on Interlayer-Expanded MoS2/Graphene Cathode

      Xin Fan, Rohit Ranganathan Gaddam, Nanjundan Ashok Kumar and Xiu Song Zhao

      Version of Record online: 26 MAY 2017 | DOI: 10.1002/aenm.201700317

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      Facile interlayer expansion in layered material with designed structure is applied in lithium–magnesium hybrid battery. With an improved magnesium ion diffusion kinetics and good electrochemical performance, it provides a step forward to the cost-effective and high-energy battery application.

  8. Research News

    1. Charge-Transfer Excitations: A Challenge for Time-Dependent Density Functional Theory That Has Been Met

      Stephan Kümmel

      Version of Record online: 26 MAY 2017 | DOI: 10.1002/aenm.201700440

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      Charge-transfer states play an important role in organic solar cells, and generally in many new materials that are aimed at converting sunlight into other forms of energy. The incorrect description of charge-transfer excitations is considered one of the hallmark failures of time-dependent density functional theory. The problem has been overcome by the development of nonempirically tuned range-separated hybrid functionals.

  9. Reviews

    1. Hybrid Perovskites: Effective Crystal Growth for Optoelectronic Applications

      Taewoo Jeon, Sung Jin Kim, Jisun Yoon, Jinwoo Byun, Hye Rim Hong, Tae-Woo Lee, Ji-Seon Kim, Byungha Shin and Sang Ouk Kim

      Version of Record online: 24 MAY 2017 | DOI: 10.1002/aenm.201602596

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      Organic–inorganic hybrid perovskite is a promising material for next-generation optoelectronic devices. A wide range of optoelectronic properties of perovskite are controllable for target applications using effective crystal growth. Recent progress in perovskite optoelectronics is highlighted, focusing particularly on solar cells and light-emitting diodes, as well as crystallization strategies for light harvesting and light emitting.

  10. Full Papers

    1. Mechanism of Na-Ion Storage in Hard Carbon Anodes Revealed by Heteroatom Doping

      Zhifei Li, Clement Bommier, Zhi Sen Chong, Zelang Jian, Todd Wesley Surta, Xingfeng Wang, Zhenyu Xing, Joerg C. Neuefeind, William F. Stickle, Michelle Dolgos, P. Alex Greaney and Xiulei Ji

      Version of Record online: 23 MAY 2017 | DOI: 10.1002/aenm.201602894

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      The structure of hard carbon is systematically tuned by heteroatom doping, which reveals the mechanism of sodium storage in hard carbon. Through P- and S-doping, the d-spacing of hard carbon is dilated, which leads to a higher plateau capacity, while P- and B-doping generate more defects site, which enhances the first sodiation capacity. Computational studies provide indispensable confirmation of the mechanism.

  11. Research News

    1. Crosslinked Semiconductor Polymers for Photovoltaic Applications

      Frank-Julian Kahle, Christina Saller, Anna Köhler and Peter Strohriegl

      Version of Record online: 23 MAY 2017 | DOI: 10.1002/aenm.201700306

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      Three promising applications of crosslinking in organic solar cells are reviewed. Most importantly, crosslinking is used to stabilize the blend morphology in bulk heterojunction solar cells. In addition, stable interlayers can be formed and crosslinking enables solution processing of multilayer devices. A third possibility is the stabilization of nanoimprinted patterns in the active layers.

  12. Full Papers

    1. Fully Biodegradable Microsupercapacitor for Power Storage in Transient Electronics

      Geumbee Lee, Seung-Kyun Kang, Sang Min Won, Philipp Gutruf, Yu Ra Jeong, Jahyun Koo, Sang-Soo Lee, John A. Rogers and Jeong Sook Ha

      Version of Record online: 23 MAY 2017 | DOI: 10.1002/aenm.201700157

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      An entirely biodegradable microsupercapacitor is successfully fabricated using water-soluble metal electrodes, agarose gel electrolyte, and poly(lactic-co-glycolic acid) substrate. The development of biodegradable, high performance supercapacitors represents an important advance in the area of transient electronics, with potentially important consequences in technologies for biomedicine, environmental monitoring, sustainable electronics, and other areas.

  13. Communications

    1. Electrochemical Energy Storage with a Reversible Nonaqueous Room-Temperature Aluminum–Sulfur Chemistry

      Xingwen Yu and Arumugam Manthiram

      Version of Record online: 23 MAY 2017 | DOI: 10.1002/aenm.201700561

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      A nonaqueous reversible room-temperature aluminum-sulfur battery is demonstrated with a strategically designed cathode structure and mechanistically studied with a sequence of electrochemical, spectroscopic, and microscopic techniques.

  14. Full Papers

    1. Carbon Coated Bimetallic Sulfide Hollow Nanocubes as Advanced Sodium Ion Battery Anode

      Jingwei Chen, Shaohui Li, Vipin Kumar and Pooi See Lee

      Version of Record online: 23 MAY 2017 | DOI: 10.1002/aenm.201700180

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      Carbon coated bimetallic sulfide hollow nanocubes can be obtained by polydopamine coating on Prussian blue analog precursors prior to the sulfidation process. The optimum carbon coated bimetallic sulfide nanocubes as sodium ion battery anode can deliver improved specific capacity, rate performance, and cycling stability, due to the higher surface area, smaller charge transfer resistance, and higher diffusion coefficient.

    2. Diammonium and Monoammonium Mixed-Organic-Cation Perovskites for High Performance Solar Cells with Improved Stability

      Jianfeng Lu, Liangcong Jiang, Wei Li, Feng Li, Narendra K. Pai, Andrew D. Scully, Cheng-Min Tsai, Udo Bach, Alexandr N. Simonov, Yi-Bing Cheng and Leone Spiccia

      Version of Record online: 23 MAY 2017 | DOI: 10.1002/aenm.201700444

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      Mixed organic cation lead–halide perovskite solar cells demonstrate remarkably improved stability while maintaining high efficiency. Incorporation of low concentrations of ethylenediammonium into CH3NH3PbI3 perovskite enables fabrication of planar solar cells with up to 18.6% power conversion efficiency that retain 75% of their performance after 72 h of continuous operation under 1 sun irradiation at 50 °C and 50% relative humidity.

    3. Improving Thermoelectric Performance of α-MgAgSb by Theoretical Band Engineering Design

      Xiaojian Tan, Ling Wang, Hezhu Shao, Song Yue, Jingtao Xu, Guoqiang Liu, Haochuan Jiang and Jun Jiang

      Version of Record online: 23 MAY 2017 | DOI: 10.1002/aenm.201700076

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      A principled scheme is proposed to design the band engineering based on careful analysis of Fermi level. Several effective dopants are predicted and numerically examined to enhance the thermoelectric performance of α-MgAgSb by band convergence. This work develops an applicable scheme for the purposive band engineering design, and the idea can be simply applied to more thermoelectric materials.

    4. Monolithic Photoassisted Water Splitting Device Using Anodized Ni-Fe Oxygen Evolution Catalytic Substrate

      Wan Jae Dong, Young Jin Song, Hansub Yoon, Gwan Ho Jung, Kisoo Kim, Sungjoo Kim and Jong-Lam Lee

      Version of Record online: 23 MAY 2017 | DOI: 10.1002/aenm.201700659

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      Ni-Fe oxyhydroxide foil is fabricated through continuous roll-to-roll compatible methods of electrodeposition and anodization. The catalysts exhibit good oxygen evolution activity and excellent stability. Moreover, Ni-Fe catalytic substrate is integrated with an amorphous silicon solar cell to demonstrate a monolithic photoassisted water splitting device. This approach provides insights for exploiting highly efficient and industry applicable water splitting device.

    5. All-Manganese-Based Binder-Free Stretchable Lithium-Ion Batteries

      Taoli Gu, Zeyuan Cao and Bingqing Wei

      Version of Record online: 23 MAY 2017 | DOI: 10.1002/aenm.201700369

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      An all-manganese-based binder-free stretchable lithium-ion battery with 100% stretchability is prepared based on the LiMn2O4/carbon nanotube (CNT) cathode and MnOx/CNT anode. A little capacity decay of 0.04% per cycle in the battery under the repeated unstretched and stretched states is achieved.

    6. Identifying the Real Minority Carrier Lifetime in Nonideal Semiconductors: A Case Study of Kesterite Materials

      Charles J. Hages, Alex Redinger, Sergiu Levcenko, Hannes Hempel, Mark J. Koeper, Rakesh Agrawal, Dieter Greiner, Christian A. Kaufmann and Thomas Unold

      Version of Record online: 23 MAY 2017 | DOI: 10.1002/aenm.201700167

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      Minority carrier lifetimes are often overestimated for kesterite materials from time-resolved photoluminescence (TRPL) due to complex charge carrier dynamics in this material system. Here, it is shown that detrapping processes dominate the photoluminescence decay for Cu2ZnSnSe4 and Cu2ZnSn(S,Se)4. Minority carrier lifetimes ≤500 ps are estimated from TRPL, device simulation, and additional measurements demonstrating a significant performance limitation.

    7. High Performance, Flexible, Solid-State Supercapacitors Based on a Renewable and Biodegradable Mesoporous Cellulose Membrane

      Dawei Zhao, Chaoji Chen, Qi Zhang, Wenshuai Chen, Shouxin Liu, Qingwen Wang, Yixing Liu, Jian Li and Haipeng Yu

      Version of Record online: 23 MAY 2017 | DOI: 10.1002/aenm.201700739

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      A renewable, flexible, and degradable mesoporous cellulose membrane is prepared using a facile and scalable approach, and exhibits rational capacitance and excellent cyclability used in solid-state energy storage devices. A simple yet smart integrated design of micro-supercapacitors is also developed by directly depositing the electrode materials on the membrane-based polymer electrolyte without the use of binder or complicated setups.

  15. Communications

    1. Composition Engineering in Doctor-Blading of Perovskite Solar Cells

      Shi Tang, Yehao Deng, Xiaopeng Zheng, Yang Bai, Yanjun Fang, Qingfeng Dong, Haotong Wei and Jinsong Huang

      Version of Record online: 23 MAY 2017 | DOI: 10.1002/aenm.201700302

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      By tuning the composition of precursor solution high phase purity perovskite thin films are obtained at a temperature of 120 °C via doctor-blading, and over 19% power conversion efficiencies are achieved in inverted p–i–n structured perovskite solar cells.

  16. Full Papers

    1. Hydrogenated Core–Shell MAX@K2Ti8O17 Pseudocapacitance with Ultrafast Sodium Storage and Long-Term Cycling

      Guodong Zou, Jianxin Guo, Xianyu Liu, Qingrui Zhang, Gang Huang, Carlos Fernandez and Qiuming Peng

      Version of Record online: 22 MAY 2017 | DOI: 10.1002/aenm.201700700

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      A new method is described to prepare core–shell Ti3SiC2@K2Ti8O17 composites bestowing high sodium-ion intercalation pseudocapacitance by alkalization hydrothermal reaction and hydrogenation. High capacity and structural stability, especially at high rates, are achieved simultaneously. The method is highlighted by its simplicity and high yield and can be extended to prepare other MAX-based electrode materials.

    2. Subtle Roles of Sb and S in Regulating the Thermoelectric Properties of N-Type PbTe to High Performance

      Gangjian Tan, Constantinos C. Stoumpos, Si Wang, Trevor P. Bailey, Li-Dong Zhao, Ctirad Uher and Mercouri G. Kanatzidis

      Version of Record online: 22 MAY 2017 | DOI: 10.1002/aenm.201700099

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      High n-type thermoelectric figure of merit ZT = 1.4 at 900 K is achieved in Sb-doped PbTe alloyed with PbS. Sb enhances the power factor of PbTe, while PbS alloying significantly reduces the thermal conductivity. The high performance achieved with n-type PbTe makes it a robust material for mid-to-high temperature thermoelectric power generation.

    3. High-Temperature Treatment of Li-Rich Cathode Materials with Ammonia: Improved Capacity and Mean Voltage Stability during Cycling

      Evan M. Erickson, Hadar Sclar, Florian Schipper, Jing Liu, Ruiyuan Tian, Chandan Ghanty, Larisa Burstein, Nicole Leifer, Judith Grinblat, Michael Talianker, Ji-Yong Shin, Jordan K. Lampert, Boris Markovsky, Anatoly I. Frenkel and Doron Aurbach

      Version of Record online: 22 MAY 2017 | DOI: 10.1002/aenm.201700708

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      Li-rich, xLi2MnO3·(1−x)LiNiaCobMncO2 (a + b + c = 1), Li-ion battery cathode materials suffer a debilitating voltage fade during cycling that prohibits their commercialization. NH3 treatment of Li-rich materials is shown herein to limit voltage fading throughout cycling. This is caused by a bulk reduction of the material, subtle surface changes, and extraction of Li-salts.

    4. Ultrathin Co3O4 Layers with Large Contact Area on Carbon Fibers as High-Performance Electrode for Flexible Zinc–Air Battery Integrated with Flexible Display

      Xu Chen, Bin Liu, Cheng Zhong, Zhi Liu, Jie Liu, Lu Ma, Yida Deng, Xiaopeng Han, Tianpin Wu, Wenbin Hu and Jun Lu

      Version of Record online: 22 MAY 2017 | DOI: 10.1002/aenm.201700779

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      Ultrathin and mesoporous Co3O4 layers are in situ grown on the surface of carbon fibers with maximum interfacial contact area as high-performance air electrode for a flexible rechargeable Zn–air battery integrated with a flexible display device. The whole integrated device not only possesses excellent flexibility but also has shape-tailorable capability that can operate during the tailoring processes.

    5. A Two-Resonance Tapping Cavity for an Optimal Light Trapping in Thin-Film Solar Cells

      Quan Liu, Pablo Romero-Gomez, Paola Mantilla-Perez, Silvia Colodrero, Johann Toudert and Jordi Martorell

      Version of Record online: 18 MAY 2017 | DOI: 10.1002/aenm.201700356

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      A two-resonance tapping cavity is proposed for an effective broadband light trapping in the absorber layer of thin-film solar cells. When this new optical cavity is applied to high performance polymer cells, an optimal light harvesting enhancement is achieved, corresponding to a 19% increase in power conversion efficiency.

  17. Reviews

    1. Metal-Organic Framework-Derived Non-Precious Metal Nanocatalysts for Oxygen Reduction Reaction

      Shaofang Fu, Chengzhou Zhu, Junhua Song, Dan Du and Yuehe Lin

      Version of Record online: 16 MAY 2017 | DOI: 10.1002/aenm.201700363

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      By virtue of their large surface area, controllable composition and pore structure, metal-organic framework-derived non-precious metal nanocatalysts are extensively investigated and an exceptional catalytic performance for oxygen reduction reaction in fuel cells is presented.

  18. Full Papers

    1. Engineering the Thermoelectric Transport in Half-Heusler Materials through a Bottom-Up Nanostructure Synthesis

      Huaizhou Zhao, Binglei Cao, Shanming Li, Ning Liu, Jiawen Shen, Shan Li, Jikang Jian, Lin Gu, Yanzhong Pei, Gerald Jeffrey Snyder, Zhifeng Ren and Xiaolong Chen

      Version of Record online: 16 MAY 2017 | DOI: 10.1002/aenm.201700446

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      A series of representative half-Heusler thermoelectric (TE) materials are prepared by a bottom-up nanostructure synthesis approach based on the displacement reaction between metal chlorides and lithium, followed by vacuum-assisted spark plasma sintering process. These samples are featured with dense dislocation arrays at the grain boundaries. The phonon and electrical transports can be manipulated by adjusting the dislocations, leading to enhanced TE performances.

    2. You have full text access to this OnlineOpen article
      A Metal-Free and Biotically Degradable Battery for Portable Single-Use Applications

      Juan Pablo Esquivel, Perla Alday, Omar A. Ibrahim, Belén Fernández, Erik Kjeang and Neus Sabaté

      Version of Record online: 16 MAY 2017 | DOI: 10.1002/aenm.201700275

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      A microbattery entirely based on nontoxic, organic, abundant, and inexpensive raw materials and fabricated with cost-efficient scalable manufacturing processes is presented. The nature of the device allows it to be discarded without the need for any specific recycling facilities after use, because it biotically degrades to simple compounds, such as CO2, CH4, H2O, and N2, as a result of the action of micro-organisms.

    3. You have full text access to this OnlineOpen article
      Additional Sodium Insertion into Polyanionic Cathodes for Higher-Energy Na-Ion Batteries

      Matteo Bianchini, Penghao Xiao, Yan Wang and Gerbrand Ceder

      Version of Record online: 16 MAY 2017 | DOI: 10.1002/aenm.201700514

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      The additional intercalation of sodium into polyanionic frameworks of the family Na3V2(PO4)2F3-2yO2y is reported. The most oxygen-rich compound, in particular, obtains extra capacity at a relatively high voltage and operando XRD demonstrates a low volume change upon cycling. Aluminum substitution is finally used into this framework to experimentally demonstrate how to improve sodium kinetics in this highly sodiated regime.

    4. Anion Doping: A New Strategy for Developing High-Performance Perovskite-Type Cathode Materials of Solid Oxide Fuel Cells

      Zhenbao Zhang, Yinlong Zhu, Yijun Zhong, Wei Zhou and Zongping Shao

      Version of Record online: 16 MAY 2017 | DOI: 10.1002/aenm.201700242

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      A novel and facile strategy toward the development of a high-performance cathode is proposed for the first time to resolve the slow activity of cathode materials by embedding anion ions into the perovskite lattice for intermediate-temperature solid oxide fuel cells.

  19. Reviews

    1. Transition-Metal (Fe, Co, Ni) Based Metal-Organic Frameworks for Electrochemical Energy Storage

      Shasha Zheng, Xinran Li, Bingyi Yan, Qin Hu, Yuxia Xu, Xiao Xiao, Huaiguo Xue and Huan Pang

      Version of Record online: 16 MAY 2017 | DOI: 10.1002/aenm.201602733

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      Transition-metal (Fe, Co, Ni) based metal-organic frameworks represent one promising kind of power materials for electrochemical energy storage. Synthesis strategies, tailored material properties and different electrochemical performances are prominent features of supercapacitors and batteries. Transition-metal (Fe, Co, Ni) based metal-organic frameworks and their derivative nanomaterials comprehensively summarized and evaluations are given in this review.

  20. Communications

    1. Tailoring Organic Cation of 2D Air-Stable Organometal Halide Perovskites for Highly Efficient Planar Solar Cells

      Yani Chen, Yong Sun, Jiajun Peng, Wei Zhang, Xiaojun Su, Kaibo Zheng, Tõnu Pullerits and Ziqi Liang

      Version of Record online: 16 MAY 2017 | DOI: 10.1002/aenm.201700162

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      2D organometal halide perovskites with high environmental stability are successfully obtained by introducing short branched-chain spacer cations. The resulting (iso-BA)2(MA)3Pb4I13 exhibits a remarkable increase of optical absorption, crystallinity, and in particular out-of-plane orientation in comparison to the conventional linear n-BA+. A high power conversion efficiency of 10.63% is hence obtained for such 2D perovskite solar cells.

  21. Progress Reports

    1. Perovskite Tandem Solar Cells

      Niraj N. Lal, Yasmina Dkhissi, Wei Li, Qicheng Hou, Yi-Bing Cheng and Udo Bach

      Version of Record online: 16 MAY 2017 | DOI: 10.1002/aenm.201602761

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      The remarkable progress of perovskite tandem solar cells, now above 25% efficiency for a silicon–perovskite four-terminal tandem and 18% for monolithic all-perovskite tandems, is reviewed. In detail, the candidate materials, contact layers, and device challenges are examined, outlining a roadmap toward a future of true third-generation thin-film photovoltaics comprising high-efficiency at low cost.

  22. Full Papers

    1. Improving Interfacial Charge Recombination in Planar Heterojunction Perovskite Photovoltaics with Small Molecule as Electron Transport Layer

      Ning Wang, Kexiang Zhao, Tao Ding, Wenbo Liu, Ali Said Ahmed, Zongrui Wang, Miaomiao Tian, Xiao Wei Sun and Qichun Zhang

      Version of Record online: 15 MAY 2017 | DOI: 10.1002/aenm.201700522

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      A new sulfur-containing n-type organic small molecule hexaazatrinaphtho[2,3-c][1,2,5]thiadiazole (HATNT) is proposed for perovskite solar cells. In comparison with traditional PC61BM, benefitting from much more significant suppression of charge recombination at the MAPbI3/HATNT interface and strong interfacial interaction between the MAPbI3 and HATNT via S[BOND]I or S[BOND]Pb bonding, solution-processed high-performance HATNT-based perovskite solar cells are demonstrated with an optimized efficiency up to 18.1%.

  23. Communications

    1. Perovskite Chalcogenides with Optimal Bandgap and Desired Optical Absorption for Photovoltaic Devices

      Ming-Gang Ju, Jun Dai, Liang Ma and Xiao Cheng Zeng

      Version of Record online: 15 MAY 2017 | DOI: 10.1002/aenm.201700216

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      SrSnSe3 and SrSnS3 are predicted to be direct gap semiconductors with bandgap value being within the optimal range of 0.9–1.6 eV, to exhibit good optical absorption properties and high carrier mobility, and to enable flexible bandgaps continuously tuned within the range of 0.9–1.6 eV via the elemental mixing strategy, thereby render both materials as promising candidates for photovoltaic applications.

    2. An Advanced Separator for Li–O2 Batteries: Maximizing the Effect of Redox Mediators

      Seon Hwa Lee, Jin-Bum Park, Hyung-Seok Lim and Yang-Kook Sun

      Version of Record online: 12 MAY 2017 | DOI: 10.1002/aenm.201602417

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      The performance of Li–O2 batteries with a redox mediator is improved by using a negatively charged polymer-coated separator. Coating PEDOT:PSS on the GF/C separator mitigated the migration of the redox mediator to the Li metal anode, leading to a more than tenfold extension in cycle life with high round-trip efficiency of 90%.

    3. Molecular Engineered Hole-Extraction Materials to Enable Dopant-Free, Efficient p-i-n Perovskite Solar Cells

      Huanle Chen, Weifei Fu, Chuyi Huang, Zhongqiang Zhang, Shuixing Li, Feizhi Ding, Minmin Shi, Chang-Zhi Li, Alex K.-Y. Jen and Hongzheng Chen

      Version of Record online: 12 MAY 2017 | DOI: 10.1002/aenm.201700012

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      Two hole-extraction materials (HEMs)—TPP-OMeTAD and TPP-SMeTAD—are developed for the construction of p-i-n perovskite solar cells (PVSCs). Through replacing the oxygen atom with sulfur at the arylamine terminal substituents, TPP-SMeTAD exhibits superior energetics, charge extraction and trap passivation capabilities to perovskite, over those of TPP-OMeTAD. It leads to improved photovoltaic performance and reduced hysteresis in TPP-SMeTAD based p-i-n PVSCs.

  24. Full Papers

    1. High-Quality Graphene Microflower Design for High-Performance Li–S and Al-Ion Batteries

      Hao Chen, Chen Chen, Yingjun Liu, Xiaoli Zhao, Nimrodh Ananth, Bingna Zheng, Li Peng, Tieqi Huang, Weiwei Gao and Chao Gao

      Version of Record online: 12 MAY 2017 | DOI: 10.1002/aenm.201700051

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      Scalable high-quality graphene microflower (GmF) is produced through facial spray drying and annealing steps, which combines the sub-millimeter continuous highly crystallized graphene surface with mesoporous and few-stacked structures. GmF3000 affords remarkable electrochemical properties in both Li–S and Al-ion batteries, demonstrating great significance of high-quality graphene design in energy storage technologies.

    2. Electrospray-Assisted Fabrication of Moisture-Resistant and Highly Stable Perovskite Solar Cells at Ambient Conditions

      Shalinee Kavadiya, Dariusz M. Niedzwiedzki, Su Huang and Pratim Biswas

      Version of Record online: 12 MAY 2017 | DOI: 10.1002/aenm.201700210

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      Fabricating highly stable perovskite solar cells using a simple and scalable electrospray deposition technique at ambient condition. Perovskite film formed by electrospray is uniform, smooth, and moisture-resistant in nature, making the cells fight against moisture without the use of additives or encapsulation.

  25. Communications

    1. Defect-Engineered Ultrathin δ-MnO2 Nanosheet Arrays as Bifunctional Electrodes for Efficient Overall Water Splitting

      Yunxuan Zhao, Chao Chang, Fei Teng, Yufei Zhao, Guangbo Chen, Run Shi, Geoffrey I. N. Waterhouse, Weifeng Huang and Tierui Zhang

      Version of Record online: 12 MAY 2017 | DOI: 10.1002/aenm.201700005

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      Atomically thick δ-MnO2 nanosheet arrays on a nickel foam are successfully synthesized through an in situ hydrothermal growth method. The ultrathin δ-MnO2 nanosheets contain an abundance of oxygen vacancies and unsaturated Mn sites, which give the nanosheets semimetallic character, high electrical conductivity, excellent hydrogen evolution reaction, and oxygen evolution reaction performance.

  26. Reviews

    1. An Initial Review of the Status of Electrode Materials for Potassium-Ion Batteries

      James C. Pramudita, Divya Sehrawat, Damian Goonetilleke and Neeraj Sharma

      Version of Record online: 12 MAY 2017 | DOI: 10.1002/aenm.201602911

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      A critical review and perspectives of electrode materials for potassium-ion batteries, and the techniques available to characterise the materials or devices and search for new materials are presented.

  27. Full Papers

    1. New Acetylene-Bridged 9,10-Conjugated Anthracene Sensitizers: Application in Outdoor and Indoor Dye-Sensitized Solar Cells

      Yogesh S. Tingare, Nguyễn So'n Vinh, Hsien-Hsin Chou, Yu-Chieh Liu, Yean-San Long, Teng-Chun Wu, Tzu-Chien Wei and Chen-Yu Yeh

      Version of Record online: 12 MAY 2017 | DOI: 10.1002/aenm.201700032

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      New anthracene-based sensitizers are designed for the application in dye-sensitized solar cells. Alteration of alkyl to alkoxy chain and incorporation of electron deficient moieties in these dyes (TY3, TY4, and TY6) are found to play a significant role in the efficiency enhancement. The dye TY6 showed best efficiency of 8.08% and 28.56% under 1 sun and T5 illumination, respectively.

    2. Silicon Composite Electrodes with Dynamic Ionic Bonding

      Sen Kang, Ke Yang, Scott R. White and Nancy R. Sottos

      Version of Record online: 12 MAY 2017 | DOI: 10.1002/aenm.201700045

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      Dynamic ionic bonding is successfully incorporated into silicon-based lithium-ion battery anodes to increase cycle lifetimes and reliability. The formation of amine–carboxylate ionic bonding upon mixing amine functionalized Si nanoparticles with poly(acrylic acid) binder is confirmed by X-ray photoelectron spectroscopy and Raman spectroscopy. The dynamic ionic bonds effectively mitigate the deterioration of electrical interfaces resulting in longer cycling stability with 80% capacity retention after 400 cycles.

    3. Fluorinated End-Groups in Electrolytes Induce Ordered Electrolyte/Anode Interface Even at Open-Circuit Potential as Revealed by Sum Frequency Generation Vibrational Spectroscopy

      Yonatan Horowitz, Hui-Ling Han, Walter T. Ralston, Joyce Rodrigues de Araujo, Eric Kreidler, Chris Brooks and Gabor A. Somorjai

      Version of Record online: 12 MAY 2017 | DOI: 10.1002/aenm.201602060

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      In this sum frequency generation vibrational spectroscopy study, it is revealed that a fluorinated ether in contact with an amorphous silicon anode has a different adsorption orientation than its hydrocarbon counterpart even at open-circuit potential, leading to a better protective layer while enabling lithium ions to intercalate deeper into the amorphous silicon bulk.

  28. Communications

    1. A High-Performance Composite Electrode for Vanadium Redox Flow Batteries

      Qi Deng, Peng Huang, Wen-Xin Zhou, Qiang Ma, Nan Zhou, Hao Xie, Wei Ling, Chun-Jiao Zhou, Ya-Xia Yin, Xiong-Wei Wu, Xiang-Yang Lu and Yu-Guo Guo

      Version of Record online: 12 MAY 2017 | DOI: 10.1002/aenm.201700461

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      A reduced graphene oxide-graphene felt electrode with excellent electrocatalytic redox reversibility toward V2+/V3+ and VO2+/VO2+ redox couples in vanadium batteries is fabricated using a facile hydrothermal method. The composite electrode possesses abundant oxygen functional groups, high electron conductivity, and outstanding stability. Moreover, a discharge capacity of 20 Ah L−1 is obtained with a high voltage efficiency (74.5%) and energy efficiency (72.0%), even at a large current density of 200 mA cm−2.

  29. Full Papers

    1. Temperature and Electrical Poling Effects on Ionic Motion in MAPbI3 Photovoltaic Cells

      Annalisa Bruno, Daniele Cortecchia, Xin Yu Chin, Kunwu Fu, Pablo P. Boix, Subodh Mhaisalkar and Cesare Soci

      Version of Record online: 12 MAY 2017 | DOI: 10.1002/aenm.201700265

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      It is proven that ionic motion is the dominant mechanism behind MAPbI3 solar cell hysteresis by investigating electrical poling effects in a wide temperature range. The power conversion efficiency reduces at low temperature, but then recovers and improves up to 20% of its original value under electrical bias. This effect is attributed to the electron extraction barrier reduction at the TiO2/MAPbI3 interface.

    2. Evaluation of Electron Donor Materials for Solution-Processed Organic Solar Cells via a Novel Figure of Merit

      Jie Min, Yuriy N. Luponosov, Chaohua Cui, Bin Kan, Haiwei Chen, Xiangjian Wan, Yongsheng Chen, Sergei A. Ponomarenko, Yongfang Li and Christoph J. Brabec

      Version of Record online: 12 MAY 2017 | DOI: 10.1002/aenm.201700465

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      The industrial figure of merit approach as a powerful tool can provide valuable insights for those attempting to realize the efficient evaluation of photovoltaic materials.

    3. High-Performance Triboelectric Nanogenerators Based on Solid Polymer Electrolytes with Asymmetric Pairing of Ions

      Hanjun Ryu, Ju-Hyuck Lee, Tae-Yun Kim, Usman Khan, Jeong Hwan Lee, Sung Soo Kwak, Hong-Joon Yoon and Sang-Woo Kim

      Version of Record online: 12 MAY 2017 | DOI: 10.1002/aenm.201700289

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      High-performance triboelectric nanogenerators are demonstrated by adding electrolytes with asymmetric ion pairing to polymer contact layers in order to enhance their triboelectric property. Solid polymer electrolyte based nanogenerators produce dramatically higher power output than typical metal-polymer nanogenerators and reveal a stable doping effect. Therefore, solid polymer electrolytes are promising materials for realizing high-performance nanogenerators and self-powered small electronics.

    4. KTi2(PO4)3 with Large Ion Diffusion Channel for High-Efficiency Sodium Storage

      Jinzhi Sheng, Chen Peng, Yanan Xu, Haoying Lyu, Xu Xu, Qinyou An and Liqiang Mai

      Version of Record online: 12 MAY 2017 | DOI: 10.1002/aenm.201700247

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      Novel NASICON-type KTi2(PO4)3 provides a flat discharge voltage plateau, which is a promising electrode for sodium storage. A KTi2(PO4)3/carbon nanocomposite is constructed via a co-precipitation method followed by an annealing process, exhibiting superior ultrahigh rate capability (76 mAh g−1 at 100 C) and excellent high-rate cycling stability (74.2% capacity retention after 5000 cycles at 20 C).

    5. Scalable and Solid-State Redox Functionalization of Transparent Single-Walled Carbon Nanotube Films for Highly Efficient and Stable Solar Cells

      Kehang Cui, Yang Qian, Il Jeon, Anton Anisimov, Yutaka Matsuo, Esko I. Kauppinen and Shigeo Maruyama

      Version of Record online: 12 MAY 2017 | DOI: 10.1002/aenm.201700449

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      A scalable and room-temperature solid-state redox functionalization process for single-walled carbon nanotubes with instant efficacy and high stability is reported, with the sheet resistance reaching 69.4 Ω sq−1 at 90% transparency without noticeable increase over 12 months. The redox functionalized films also serve as an antireflective layer for Si heterojunction solar cells, achieving the record-high air-stable power conversion efficiency of 14.09%.

  30. Progress Reports

    1. Porous Carbon Composites for Next Generation Rechargeable Lithium Batteries

      Hao Liu, Xiaoxue Liu, Wei Li, Xin Guo, Yong Wang, Guoxiu Wang and Dongyuan Zhao

      Version of Record online: 12 MAY 2017 | DOI: 10.1002/aenm.201700283

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      Porous carbon composites are promising as high-performance electrode materials for high-power rechargeable lithium batteries. Their unique properties such as high surface area, high conductivity, structural stability, and highly reactive electrode materials confined in porous carbon frameworks endow excellent electrochemical performance in many applications, including lithium ion batteries, lithium–sulfur batteries, and lithium–oxygen batteries.

  31. Full Papers

    1. Manipulating Adsorption–Insertion Mechanisms in Nanostructured Carbon Materials for High-Efficiency Sodium Ion Storage

      Shen Qiu, Lifen Xiao, Maria L. Sushko, Kee Sung Han, Yuyan Shao, Mengyu Yan, Xinmiao Liang, Liqiang Mai, Jiwen Feng, Yuliang Cao, Xinping Ai, Hanxi Yang and Jun Liu

      Version of Record online: 12 MAY 2017 | DOI: 10.1002/aenm.201700403

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      An “adsorption–intercalation” (A–I) mechanism is established for Na ion storage by using a combination of in situ X-ray diffraction mapping, ex situ electron paramagnetic resonance, electrochemical techniques, and simulations. The “A–I” mechanism means that Na ions adsorb on the defect sites of hard carbon producing a sloping voltage profile and subsequently intercalate into graphitic layers producing a flat low voltage plateau in the second stage.

  32. Communications

    1. Liquid-Phase Exfoliated Metallic Antimony Nanosheets toward High Volumetric Sodium Storage

      Jianan Gu, Zhiguo Du, Chao Zhang, Jingui Ma, Bin Li and Shubin Yang

      Version of Record online: 11 MAY 2017 | DOI: 10.1002/aenm.201700447

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      Metallic antimony nanosheets are fabricated via a facile liquid-phase exfoliation. The ultrathin nanosheets enable them as building blocks to construct uniform and compacted films with graphene. In these hybrid films, the volume change of metallic antimony can be alleviated via the good flexibility of graphene, leading to novel anode materials with high volumetric capacity, and good cyclic performance for sodium storage.

  33. Full Papers

    1. High-Performance All-Solid-State Lithium–Sulfur Batteries Enabled by Amorphous Sulfur-Coated Reduced Graphene Oxide Cathodes

      Xiayin Yao, Ning Huang, Fudong Han, Qiang Zhang, Hongli Wan, Jean Pierre Mwizerwa, Chunsheng Wang and Xiaoxiong Xu

      Version of Record online: 11 MAY 2017 | DOI: 10.1002/aenm.201602923

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      An ≈2 nm amorphous sulfur-coated reduced graphene oxide composite is employed in all-solid-state lithium–sulfur batteries. The composite can significantly reduce the interface resistance and stress/strain of sulfur cathodes, thus leading to an ultrastable all-solid-state lithium–sulfur battery with excellent rate capability and cycling stability, showing reversible capacities of 830 mA h g−1 at 1.0 C for 750 cycles.

  34. Communications

    1. Scalable, Self-Aligned Printing of Flexible Graphene Micro-Supercapacitors

      Woo Jin Hyun, Ethan B. Secor, Chang-Hyun Kim, Mark C. Hersam, Lorraine F. Francis and C. Daniel Frisbie

      Version of Record online: 11 MAY 2017 | DOI: 10.1002/aenm.201700285

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      Scalable printing of miniaturized flexible graphene micro-supercapacitors is demonstrated using a self-aligned fabrication strategy. The rational integration of imprint lithography and inkjet printing yields high-resolution, flexible graphene micro-supercapacitors with excellent performance. Demonstrating a reliable, versatile process with high-performance functional materials, this study establishes an effective route to scale down device size while scaling up production throughput.

    2. A Shell-Shaped Carbon Architecture with High-Loading Capability for Lithium Sulfide Cathodes

      Sheng-Heng Chung, Pauline Han, Chi-Hao Chang and Arumugam Manthiram

      Version of Record online: 11 MAY 2017 | DOI: 10.1002/aenm.201700537

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      A shell-shaped carbon electrode directly containing bulky lithium sulfide (Li2S) as the active-material core demonstrates optimized cell-design specifications with the highest Li2S loading (8 mg cm−2) and the lowest electrolyte/Li2S ratio (9/1). The cell design enables the high-loading cathodes to exhibit exceptionally high areal, gravimetric, and volumetric capacities with a high capacity retention of 90% over 200 cycles.

  35. Full Papers

    1. Understanding and Eliminating Hysteresis for Highly Efficient Planar Perovskite Solar Cells

      Changlei Wang, Chuanxiao Xiao, Yue Yu, Dewei Zhao, Rasha A. Awni, Corey R. Grice, Kiran Ghimire, Danae Constantinou, Weiqiang Liao, Alexander J. Cimaroli, Pei Liu, Jing Chen, Nikolas J. Podraza, Chun-Sheng Jiang, Mowafak M. Al-Jassim, Xingzhong Zhao and Yanfa Yan

      Version of Record online: 11 MAY 2017 | DOI: 10.1002/aenm.201700414

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      Through detailed characterizations, it is identified that the current density-voltage hysteresis of planar perovskite solar cells using low-temperature atomic-layer deposited SnO2 electron selective layers originates from the poor-electrical conductivity of the SnO2 layers. A facile low-temperature thermal annealing in ambient air can effectively reduce the degrees of the hysteresis and improve the power conversion efficiency of planar perovskite solar cells.

    2. Multistep Photoluminescence Decay Reveals Dissociation of Geminate Charge Pairs in Organolead Trihalide Perovskites

      Ramūnas Augulis, Marius Franckevičius, Vytautas Abramavičius, Darius Abramavičius, Shaik Mohammed Zakeeruddin, Michael Grätzel and Vidmantas Gulbinas

      Version of Record online: 11 MAY 2017 | DOI: 10.1002/aenm.201700405

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      Ultrafast time-resolved measurements of methylammonium lead halide perovskite photoluminescence enable separation of the fast and slow decay components attributed to the geminate and nongeminate charge carrier recombination. The geminate recombination dominates at very low excitation intensities during initial several tens of picoseconds and reveals the gradual spatial separation of photogenerated weakly bound geminate charge pairs.

  36. Communications

    1. Highly Conductive, Lightweight, Low-Tortuosity Carbon Frameworks as Ultrathick 3D Current Collectors

      Chaoji Chen, Ying Zhang, Yiju Li, Yudi Kuang, Jianwei Song, Wei Luo, Yanbin Wang, Yonggang Yao, Glenn Pastel, Jia Xie and Liangbing Hu

      Version of Record online: 11 MAY 2017 | DOI: 10.1002/aenm.201700595

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      Nature-inspired low-tortuosity 3D current collector is developed by directly carbonizing wood material with nature-made aligned channels. Electrode materials, lithium iron phosphate as an example, can be facilely infiltrated into the channels of the 3D current collector, forming an ultrathick 3D electrode with low tortuosity, large thickness, high mass loading, high energy density, and low deformability.

  37. Full Papers

    1. Earth-Abundant Iron Diboride (FeB2) Nanoparticles as Highly Active Bifunctional Electrocatalysts for Overall Water Splitting

      Hui Li, Peng Wen, Qi Li, Chaochao Dun, Junheng Xing, Chang Lu, Shiba Adhikari, Lin Jiang, David L. Carroll and Scott M. Geyer

      Version of Record online: 11 MAY 2017 | DOI: 10.1002/aenm.201700513

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      Iron diboride (FeB2) nanoparticles, prepared by a facile chemical reduction of Fe2+ using LiBH4 in an organic solvent, deliver a current density of 10 mA cm−2 (j10) at overpotentials of 61 mV for hydrogen evolution reaction and 296 mV for oxygen evolution reaction in alkaline electrolyte. A full alkaline electrolyzer using two identical FeB2/NF electrodes can achieve j10 at a voltage of 1.57 V for overall water splitting, rivalling the integrated state-of-the-art Pt/C and RuO2/C.

    2. Ultrathin High Surface Area Nickel Boride (NixB) Nanosheets as Highly Efficient Electrocatalyst for Oxygen Evolution

      Justus Masa, Ilya Sinev, Hemma Mistry, Edgar Ventosa, Maria de la Mata, Jordi Arbiol, Martin Muhler, Beatriz Roldan Cuenya and Wolfgang Schuhmann

      Version of Record online: 10 MAY 2017 | DOI: 10.1002/aenm.201700381

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      Ultrathin high-surface area nickel boride nanosheets supported on nickel foam show outstanding activity in catalyzing the oxygen evolution reaction, ranking among the best nonprecious catalysts for oxygen evolution reported to date.

  38. Communications

    1. Hydrothermal Synthesis of Monolithic Co3Se4 Nanowire Electrodes for Oxygen Evolution and Overall Water Splitting with High Efficiency and Extraordinary Catalytic Stability

      Wei Li, Xuefei Gao, Dehua Xiong, Fang Wei, Wei-Guo Song, Junyuan Xu and Lifeng Liu

      Version of Record online: 10 MAY 2017 | DOI: 10.1002/aenm.201602579

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      Thin Co3Se4 nanowires are grown on porous Co foam (CF) via hydrothermal selenization, forming an integrated Co3Se4/CF electrode, which exhibits outstanding catalytic performance for oxygen evolution with a high current of 397 mA cm-2 at an overpotential of 320 mV. An electrolyzer comprising two symmetrical Co3Se4/CF can operate at 10 mA cm−2 under 1.59 V over 3500 h without degradation.

  39. Full Papers

    1. High-Performance Aqueous Rechargeable Li-Ni Battery Based on Ni(OH)2/NiOOH Redox Couple with High Voltage

      Ming Zhang, Zheng Huang, Zhongrong Shen, Yingpeng Gong, Bo Chi, Jian Pu and Jian Li

      Version of Record online: 10 MAY 2017 | DOI: 10.1002/aenm.201700155

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      An in situ formed solid state Ni(OH)2/NiOOH redox couple as cathode is reported for a novel aqueous rechargeable Li-Ni battery with high voltage. The battery with redox couple cathode is able to deliver a high mass specific capacity and energy density, which indicates a potential development direction of these promising materials for advanced energy storage systems.

    2. Self-Organization of Polymer Additive, Poly(2-vinylpyridine) via One-Step Solution Processing to Enhance the Efficiency and Stability of Polymer Solar Cells

      Wonho Lee, Seonju Jeong, Changyeon Lee, Gibok Han, Changsoon Cho, Jung-Yong Lee and Bumjoon J. Kim

      Version of Record online: 10 MAY 2017 | DOI: 10.1002/aenm.201602812

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      Nonconjugated polymer additives (nPAs) are investigated for highly efficient and stable polymer solar cells (PSCs). The poly(2-vinylpyridine) (P2VP) nPA self-assembles vertically on the ZnO surface via a single coating process for the deposition of active materials. The self-assembled P2VP reduces the work function and surface defect density of ZnO, which leads to efficient and stable PSCs with up to 11.14% efficiency.

  40. Progress Reports

    1. Cellulose-based Supercapacitors: Material and Performance Considerations

      Zhaohui Wang, Petter Tammela, Maria Strømme and Leif Nyholm

      Version of Record online: 9 MAY 2017 | DOI: 10.1002/aenm.201700130

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      The most exciting recent advances in the supercapacitor application of cellulose composites based on different types of cellulose are summarized. In particular, this work focuses on parameters of cellulose-based electrodes which affect the overall capacity performance metrics of supercapacitors. Approaches toward the realisation of high active masses and high volumetric capacitances for cellulose based electrodes are discussed.

  41. Full Papers

    1. In Situ Phase-Induced Spatial Charge Separation in Core–Shell Oxynitride Nanocube Heterojunctions Realizing Robust Solar Water Splitting

      Jungang Hou, Yunzhen Wu, Shuyan Cao, Fei Liang, Zheshuai Lin, Zhanming Gao and Licheng Sun

      Version of Record online: 9 MAY 2017 | DOI: 10.1002/aenm.201700171

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      Multiband core–shell oxynitride nanocube heterojunctions owing to efficient spatial charge separation exhibit robust solar water splitting.

    2. Ultrasmall Nanoplatelets: The Ultimate Tuning of Optoelectronic Properties

      Yufeng Zhou, Mert Celikin, Andrea Camellini, Gianluca Sirigu, Xin Tong, Lei Jin, Kaustubh Basu, Xin Tong, David Barba, Dongling Ma, Shuhui Sun, François Vidal, Margherita Zavelani-Rossi, Zhiming M. Wang, Haiguang Zhao, Alberto Vomiero and Federico Rosei

      Version of Record online: 9 MAY 2017 | DOI: 10.1002/aenm.201602728

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      Ultrasmall PbSe1–xSx nanoplatelets (NPLs) are synthesized via a template-assisted cation exchange approach. The as-synthesized NPLs exhibit an unprecedented quantum yield of ≈60%, the highest ever reported for this structure. The NPLs are applied as a photosensitizer in a photoelectrochemical system giving a saturated photocurrent density of ≈5.0 mA cm−2, which is a record for NPL-based photoelectrodes in solar-driven hydrogen generation.

    3. Freestanding Flexible Li2S Paper Electrode with High Mass and Capacity Loading for High-Energy Li–S Batteries

      Mingliang Yu, Zhiyu Wang, Yuwei Wang, Yanfeng Dong and Jieshan Qiu

      Version of Record online: 9 MAY 2017 | DOI: 10.1002/aenm.201700018

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      An efficient but low-cost strategy is developed for easy production of freestanding flexible lithium sulfide (Li2S)-based paper electrodes with very high Li2S and capacity loading by in situ carbothermal reduction of Li2SO4 with electrospinning carbon. The paper electrodes exhibit greatly boosted areal capacities with excellent high-rate and cycling capability, holding great promising for the construction of high energy density metallic-Li-free or flexible lithium–sulfur batteries.

    4. From Binary to Ternary: Improving the External Quantum Efficiency of Small-Molecule Acceptor-Based Polymer Solar Cells with a Minute Amount of Fullerene Sensitization

      Yu Chen, Yunpeng Qin, Yang Wu, Cheng Li, Huifeng Yao, Ningning Liang, Xiaochen Wang, Weiwei Li, Wei Ma and Jianhui Hou

      Version of Record online: 9 MAY 2017 | DOI: 10.1002/aenm.201700328

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      Ternary blend is proved to be a potential contender for achieving high efficiency in organic photovoltaics. In contrast to complementing absorption, a minute amount of fullerene derivatives is found to play an impressive sensitizer role in enhancing the external quantum efficiency in small-molecule acceptor-based binary polymer solar cells, which is further carefully investigated and interpreted.

    5. Ultrathin Graphene–Protein Supercapacitors for Miniaturized Bioelectronics

      Islam M. Mosa, Ajith Pattammattel, Karteek Kadimisetty, Paritosh Pande, Maher F. El-Kady, Gregory W. Bishop, Marc Novak, Richard B. Kaner, Ashis K. Basu, Challa V. Kumar and James F. Rusling

      Version of Record online: 9 MAY 2017 | DOI: 10.1002/aenm.201700358

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      Commercial implantable bioelectronics are currently powered by bulky batteries which limit device miniaturization and lifespan. Herein, an approach to fabricate ultrathin implantable protein-based bioelectrochemical capacitors (bECs) which utilize biological fluids and cell culture media as electrolytes with no toxic effects on living cells is described. These bECs have the potential to power a future generation of long-life, miniaturized implantable biomedical devices.

  42. Reviews

    1. Review on High-Loading and High-Energy Lithium–Sulfur Batteries

      Hong-Jie Peng, Jia-Qi Huang, Xin-Bing Cheng and Qiang Zhang

      Version of Record online: 8 MAY 2017 | DOI: 10.1002/aenm.201700260

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      High-sulfur-loading lithium–sulfur (Li–S) batteries enabled by multiscale hierarchical design principles are reviewed. The basic insights into the interfacial reactions, strategies for mesoscale assembly, unique architectures, and configurational innovation in the cathode, anode, and separator are of specific concern. Hierarchy in the multiscale design is proposed to guide the future development of high-sulfur-loading Li–S batteries.

  43. Full Papers

    1. High Efficiency Photocatalytic Water Splitting Using 2D α-Fe2O3/g-C3N4 Z-Scheme Catalysts

      Xiaojie She, Jingjie Wu, Hui Xu, Jun Zhong, Yan Wang, Yanhua Song, Kaiqi Nie, Yang Liu, Yingchao Yang, Marco-Tulio F. Rodrigues, Robert Vajtai, Jun Lou, Daolin Du, Huaming Li and Pulickel M. Ajayan

      Version of Record online: 8 MAY 2017 | DOI: 10.1002/aenm.201700025

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      A Z-scheme catalyst is considered as a promising material for photocatalytic water splitting. α-Fe2O3 can actively promote exfoliation of g-C3N4, producing two-dimensional Z-scheme α-Fe2O3/2D g-C3N4. Hybrids show a high H2 evolution rate of 31 400 mmol g−1 h−1 and significantly enhanced quantum efficiency up to 44.35% (λ = 420 nm), which is the highest value so far reported for g-C3N4-based photocatalysts.

    2. Efficient Plastic Perovskite Solar Cell with a Low-Temperature Processable Electrodeposited TiO2 Compact Layer and a Brookite TiO2 Scaffold

      Ssu-Yu Lin, Tzu-Sen Su, Tsung-Yu Hsieh, Pei-Chia Lo and Tzu-Chien Wei

      Version of Record online: 8 MAY 2017 | DOI: 10.1002/aenm.201700169

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      An efficient plastic perovskite solar cell with a mesoporous scaffold structure is fabricated by using a low-temperature processable electrodeposited TiOx compact layer and spin-coated brookite TiO2 scaffold. The electrodeposition TiOx compact layer exhibits suitable morphology, favorable band position, and an extraordinary hole-blocking effect, while brookite TiO2 offers the capability to form a tightly packed scaffold without the need of sintering. Bending and dry-storage stability assessments are taken and showed promising results and clear direction of future improvements.

    3. Significant Influence of the Methoxyl Substitution Position on Optoelectronic Properties and Molecular Packing of Small-Molecule Electron Acceptors for Photovoltaic Cells

      Sunsun Li, Long Ye, Wenchao Zhao, Shaoqing Zhang, Harald Ade and Jianhui Hou

      Version of Record online: 8 MAY 2017 | DOI: 10.1002/aenm.201700183

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      Through substitution position manipulations of methoxyl on terminal groups in ITIC-based small-molecule acceptors (SMAs), relations between the chemical structure and optoelectronic properties of these SMAs are systematically investigated. Benefiting from the planar backbone and strong intermolecular interactions of a 5-methoxyl-substituted SMA (IT-OM-2), an efficiency of 11.9% is achieved, which is among the top efficiencies reported so far.

  44. Progress Reports

    1. Quantitative Morphology–Performance Correlations in Organic Solar Cells: Insights from Soft X-Ray Scattering

      Xuechen Jiao, Long Ye and Harald Ade

      Version of Record online: 4 MAY 2017 | DOI: 10.1002/aenm.201700084

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      Control and optimization of photoactive-layer morphology is a key strategy to boost the device performance of organic photovoltaics (OPVs). Quantitative morphological parameters (domain characteristics and orientational ordering) resolved from resonant and polarized soft X-ray scattering techniques are introduced and correlated well with the photovoltaic parameters in a wider range of OPV systems, including the record-efficiency polymer:fullerene and nonfullerene systems.

  45. Reviews

    1. Micro- and Nano-Structured Vanadium Pentoxide (V2O5) for Electrodes of Lithium-Ion Batteries

      Yuan Yue and Hong Liang

      Version of Record online: 3 MAY 2017 | DOI: 10.1002/aenm.201602545

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      A critical and comprehensive review is provided about the V2O5 and V2O5-based composites used for the cathode of lithium-ion batteries. Two novel concepts are proposed based on the statistical anlysis of published data, termed as the “high capacity band” and “empirical total capacity retention”. Finally, constructive outlooks about the improvement of the electrochemical performance of V2O5 cathodes are offered.

  46. Full Papers

    1. Crystallinity Preservation and Ion Migration Suppression through Dual Ion Exchange Strategy for Stable Mixed Perovskite Solar Cells

      Tiankai Zhang, Mingzhu Long, Keyou Yan, Minchao Qin, Xinhui Lu, Xiaoliang Zeng, Chi Man Cheng, Kam Sing Wong, Pengyi Liu, Weiguang Xie and Jianbin Xu

      Version of Record online: 3 MAY 2017 | DOI: 10.1002/aenm.201700118

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      A dual ion exchange (DIE) method is developed for mixed perovskite thin films by treating trigonal FAPbI3 with MABr in tert-butanol. This DIE method can preserve the initial high crystallinity and passivate vacancies/defects at grain boundaries, leading to enhanced moisture and illumination stability and reduced ion migration. The solar cell device using the DIE method achieves the highest power conversion efficiency of 18.1%, with negligible hysteresis.

    2. Mo-Based Ultrasmall Nanoparticles on Hierarchical Carbon Nanosheets for Superior Lithium Ion Storage and Hydrogen Generation Catalysis

      Ling Chen, Hao Jiang, Haibo Jiang, Haoxuan Zhang, Shaojun Guo, Yanjie Hu and Chunzhong Li

      Version of Record online: 3 MAY 2017 | DOI: 10.1002/aenm.201602782

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      A simple synthesis of uniform 3D microspheres assembled from carbon nanosheets with the incorporated MoO2 nanoclusters or Mo2C nanocrystals is demonstrated. Such assembling architecture is highly particular for preventing Mo-based ultrasmall nanoparticles from coalescing or oxidizing and endowing them with rapid electron transfer. Consequently, both of them show remarkably improved electrochemical performances.

    3. Biomimetic Spider-Web-Like Composites for Enhanced Rate Capability and Cycle Life of Lithium Ion Battery Anodes

      Pallab Bhattacharya, Manikantan Kota, Dong Hoon Suh, Kwang Chul Roh and Ho Seok Park

      Version of Record online: 2 MAY 2017 | DOI: 10.1002/aenm.201700331

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      A biomimetic strategy into the design of high performance anode materials, where the structural characteristics and working principles are inspired by sticky spider-webs. The spider-web-like network traps the active materials tightly, provides high electronic conductivity through a 3D internetworked pathways, and exhibits strong mechanical integrity for enhanced rate capability and cycle life of lithium ion battery anodes.

  47. Reviews

    1. Emerging 3D-Printed Electrochemical Energy Storage Devices: A Critical Review

      Xiaocong Tian, Jun Jin, Shangqin Yuan, Chee Kai Chua, Shu Beng Tor and Kun Zhou

      Version of Record online: 2 MAY 2017 | DOI: 10.1002/aenm.201700127

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      3D-printed electrochemical energy storage devices are an emerging research field that bridges the advanced electrochemical energy storage and future additive manufacturing. The principle material considerations, specific optimization strategies, and important advances of 3D-printed batteries and electrochemical capacitors are highlighted. Future perspectives with some unique challenges and significant directions are also discussed.

  48. Progress Reports

    1. Quinone Electrode Materials for Rechargeable Lithium/Sodium Ion Batteries

      Yiwen Wu, Ronghua Zeng, Junmin Nan, Dong Shu, Yongcai Qiu and Shu-Lei Chou

      Version of Record online: 2 MAY 2017 | DOI: 10.1002/aenm.201700278

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      Quinone electrode materials play an important role in rechargeable lithium/sodium ion batteries in replacing of inorganic materials owing to their low cost, renewability, environmentally benignity. However, quinone electrodes face big challenges of the dissolution of quinones in organic electrolytes, poor electronic conductivity and low discharge plateau. A comprehensive overview of various strategies for improvements of these problems is provided.

  49. Communications

    1. Back Contact Engineering for Increased Performance in Kesterite Solar Cells

      Priscilla D. Antunez, Douglas M. Bishop, Yun Seog Lee, Tayfun Gokmen, Oki Gunawan, Talia S. Gershon, Teodor K. Todorov, Saurabh Singh and Richard Haight

      Version of Record online: 2 MAY 2017 | DOI: 10.1002/aenm.201602585

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      High performing kesterite photovoltaic devices show improved efficiency parameters after exfoliation and back contact engineering. The use of a high work function material (MoO3) and a reflective back contact (Au) results in higher open circuit voltage (VOC) and short circuit current (JSC), which closely match model simulations.

  50. Full Papers

    1. Densely Packed Random Quarterpolymers Containing Two Donor and Two Acceptor Units: Controlling Absorption Ability and Molecular Interaction to Enable Enhanced Polymer Photovoltaic Devices

      So-Huei Kang, Tanya Kumari, Sang Myeon Lee, Mingyu Jeong and Changduk Yang

      Version of Record online: 2 MAY 2017 | DOI: 10.1002/aenm.201700349

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      A set of quarterpolymers composed of dithienyldiketopyrrolopyrrole, thieno[3,2-b]thiophene, benzo(1,2-b:4,5-b′) dithiophene, and fluorinated thieno[3,4-b]thiophene building blocks is synthesized. This simple 2D-2A strategy obtains a high power conversion efficiency of 10.30% with the synergistic effects of four monomers such as improved charge transport, reduced recombination loss, and optimized blend morphology.

    2. You have full text access to this OnlineOpen article
      K-Ion Batteries Based on a P2-Type K0.6CoO2 Cathode

      Haegyeom Kim, Jae Chul Kim, Shou-Hang Bo, Tan Shi, Deok-Hwang Kwon and Gerbrand Ceder

      Version of Record online: 2 MAY 2017 | DOI: 10.1002/aenm.201700098

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      Layered P2-type K0.6CoO2 cathode can accommodate highly reversible K-ion intercalation. The K-ion intercalation in P2-type K0.6CoO2 occurs at high rate, despite the multitude of phase transitions that are observed with in situ X-ray diffraction. The practical feasibility of K-ion batteries is further demonstrated by constructing full cells with a graphite anode.

  51. Progress Reports

    1. Investigation of Promising Air Electrode for Realizing Ultimate Lithium Oxygen Battery

      Wen-Bin Luo, Xuan-Wen Gao, Shu-Lei Chou, Yong-Mook Kang, Jia-Zhao Wang, Hua-Kun Liu and Shi-Xue Dou

      Version of Record online: 2 MAY 2017 | DOI: 10.1002/aenm.201700234

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      This progress report points out what factors affect the electrochemical performance of lithium oxygen battery including capacity, cycling lifetime, and round-trip efficiency based on recently reported publications, and aims to describe how to increase the electrochemical performance by air electrode optimization in terms of catalytic activity, air electrode structure, and stability.

    2. Objectively Evaluating the Cathode Performance of Lithium-Oxygen Batteries

      Wang Zhang, Yue Shen, Dan Sun, Zhimei Huang and Yunhui Huang

      Version of Record online: 28 APR 2017 | DOI: 10.1002/aenm.201602938

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      The cathode performance evaluation in lithium-oxygen batteries is much more complicated than that in lithium-ion batteries because of the complexity of the multi-phase electrochemical reaction. Conventional half-cell testing methods may give misleading conclusions. Modified half-cell testing methods are needed to get more instructive results for understanding the cathode chemistry and building high specific energy prototype cells.

  52. Communications

    1. Enhanced Electrocatalysis for Energy-Efficient Hydrogen Production over CoP Catalyst with Nonelectroactive Zn as a Promoter

      Tingting Liu, Danni Liu, Fengli Qu, Dengxing Wang, Ling Zhang, Ruixiang Ge, Shuai Hao, Yongjun Ma, Gu Du, Abdullah M. Asiri, Liang Chen and Xuping Sun

      Version of Record online: 27 APR 2017 | DOI: 10.1002/aenm.201700020

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      Zn functions as an effective promoter for CoP-catalyzed hydrogen evolution reaction in both acidic and alkaline media. Its high activity toward urea oxidation reaction enables Zn0.08Co0.92P/titanium mesh as a durable bifunctional catalyst electrode for energy-efficient hydrogen production with a voltage of 1.38 V to drive 10 mA cm−2 in 1.0 m KOH in the presence of 0.5 m urea.

  53. Reviews

    1. Polymer/Small Molecule/Fullerene Based Ternary Solar Cells

      Huan Li, Kun Lu and Zhixiang Wei

      Version of Record online: 27 APR 2017 | DOI: 10.1002/aenm.201602540

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      Ternary solar cells have made great progress in recent years. The state of polymer/small molecule/PCBM (fullerene acceptor) ternary systems is reviewed, with a focus on 1) the functions of small molecules, such as improving the light-harvesting ability, 2) the photo-physics process occurring in ternary systems, and 3) the influence of the small molecule on the crystallinity of the host polymer and the morphology of the active layer.

  54. Full Papers

    1. High Performance Colloidal Quantum Dot Photovoltaics by Controlling Protic Solvents in Ligand Exchange

      Jung Hoon Song, Hyekyoung Choi, Yong-Hyun Kim and Sohee Jeong

      Version of Record online: 27 APR 2017 | DOI: 10.1002/aenm.201700301

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      The control of short-chain alcohols in ligand exchange is proven to be very crucial for improving optoelectronic properties of PbS colloidal quantum dot (CQD) films. MeOH commonly used for ligand exchange of CQDs creates too many uncontrolled surface traps, but EtOH balances the ligand exchange and surface trap density, enabling a high certified power-conversion-efficiency of 10.4%.

    2. Boosting Photoelectrochemical Water Splitting by TENG-Charged Li-Ion Battery

      Tao Li, Ying Xu, Fei Xing, Xia Cao, Jie Bian, Ning Wang and Zhong Lin Wang

      Version of Record online: 27 APR 2017 | DOI: 10.1002/aenm.201700124

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      A hybrid energy harvesting system for dynamical energy and solar radiation by coupling triboelectric nanogenerator and photochemical cell (PEC), in which the mechanical energy is used to boost the photon efficiency of PEC, is described. This strategy offers a simple but effective way for enhancing the total energy utilization.

  55. Progress Reports

    1. Best Practices for Mitigating Irreversible Capacity Loss of Negative Electrodes in Li-Ion Batteries

      Vanchiappan Aravindan, Yun-Sung Lee and Srinivasan Madhavi

      Version of Record online: 27 APR 2017 | DOI: 10.1002/aenm.201602607

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      The various research strategies that have been utilized to study the elimination of ICL from high capacity anodes, such as alloy and conversion type, are described. In addition, mitigating ICL observed from the carbonaceous anodes is discussed and compared.

  56. Full Papers

    1. High Voltage LiNi0.5Mn0.3Co0.2O2/Graphite Cell Cycled at 4.6 V with a FEC/HFDEC-Based Electrolyte

      Meinan He, Chi-Cheung Su, Zhenxing Feng, Li Zeng, Tianpin Wu, Michael J. Bedzyk, Paul Fenter, Yan Wang and Zhengcheng Zhang

      Version of Record online: 26 APR 2017 | DOI: 10.1002/aenm.201700109

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      A high voltage electrolyte based on fluoroethylene carbonate and bis(2,2,2-trifluoroethyl) carbonate is developed for high voltage LiNi0.5Mn0.3Co0.2O2/graphite cells cycled between 3.0–4.6 V. The enhanced oxidative stability of the fluorinated electrolyte is examined by electrochemical cycling, microscopy, and electroscopy. The reported electrolyte also passivates the graphite enabling reversible Li+ intercalation/deintercalation on the anode side.

    2. Self-Doped, n-Type Perylene Diimide Derivatives as Electron Transporting Layers for High-Efficiency Polymer Solar Cells

      Zhenfeng Wang, Nannan Zheng, Wenqiang Zhang, He Yan, Zengqi Xie, Yuguang Ma, Fei Huang and Yong Cao

      Version of Record online: 25 APR 2017 | DOI: 10.1002/aenm.201700232

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      Serials self-doped perylene diimides (PDIs) are investigated and applied as electron transporting layer in high-efficiency polymer solar cells. Variations of both the π-deficient PDI cores and the electron-donating amine/ammonium end-groups induce electronic interactions between them in different intensity, which facilitates the management of the electron transfer properties for applications in organic electronics.

    3. Cu, Co-Embedded N-Enriched Mesoporous Carbon for Efficient Oxygen Reduction and Hydrogen Evolution Reactions

      Min Kuang, Qihao Wang, Peng Han and Gengfeng Zheng

      Version of Record online: 25 APR 2017 | DOI: 10.1002/aenm.201700193

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      A bi-metallic (Cu and Co) embedded, N-doped mesoporous carbon framework is developed as an oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) electrocatalyst, by a Cu-confined thermal conversion strategy of Cu(OH)2 nanowires and ZIF-67 polyhedrons. This hybrid electrocatalyst presents abundant bi-metallic electrocatalytic active sites, high nitrogen doping level, strong synergetic coupling, and excellent mass transfer, thus significantly boosting electrocatalytic ORR and HER performances.

    4. Ultrafine Metal Nanoparticles/N-Doped Porous Carbon Hybrids Coated on Carbon Fibers as Flexible and Binder-Free Water Splitting Catalysts

      Yongqi Zhang, Xinhui Xia, Xun Cao, Bowei Zhang, Nguyen Huy Tiep, Haiyong He, Shi Chen, Yizhong Huang and Hong Jin Fan

      Version of Record online: 25 APR 2017 | DOI: 10.1002/aenm.201700220

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      A new way for metal–carbon composite: Ultrafine transition metal-based nanoparticles (Ni-Fe, Ni-Mo) embedded in N-doped carbon by employing in situ reduction of metal precursor and metal-assisted carbon etching process. They are applied as efficient hydrogen evolution reaction and oxygen evolution reaction catalysts for water splitting.

    5. An Improved Li–SeS2 Battery with High Energy Density and Long Cycle Life

      Zhen Li, Jintao Zhang, Hao Bin Wu and Xiong Wen (David) Lou

      Version of Record online: 25 APR 2017 | DOI: 10.1002/aenm.201700281

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      A high-performance cathode material is synthesized by confining SeS2 in a highly ordered mesoporous carbon framework with a polydopamine protection sheath for Li–SeS2 batteries. This new cathode material might overcome the bottlenecks of current Li–S systems for high energy density rechargeable batteries.

  57. Reviews

    1. Metal-Nanowire-Electrode-Based Perovskite Solar Cells: Challenging Issues and New Opportunities

      Jihoon Ahn, Hyewon Hwang, Sunho Jeong and Jooho Moon

      Version of Record online: 25 APR 2017 | DOI: 10.1002/aenm.201602751

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      Integration between metal nanowire network-based electrodes and perovskite solar cells enables diversification of fabrication processes and functionalities of perovskite solar cells. High-performance, semi-transparent, and flexible perovskite solar cells with metal nanowires are expected to be fabricated without resorting to vacuum processes. The challenging issues facing the integration are also investigated.

  58. Communications

    1. Excellent Comprehensive Performance of Na-Based Layered Oxide Benefiting from the Synergetic Contributions of Multimetal Ions

      Hu-Rong Yao, Peng-Fei Wang, Yi Wang, Xiqian Yu, Ya-Xia Yin and Yu-Guo Guo

      Version of Record online: 24 APR 2017 | DOI: 10.1002/aenm.201700189

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      An effective strategy based on the synergetic contributions of metal ions in transition metal layers is proposed to design high-performance layered oxides for Na-ion batteries. The as-obtained NaFe0.45Co0.5Mg0.05O2 shows superior comprehensive performance benefiting from the synergetic effect of Fe3+ with high redox potential, Co3+ with good kinetics, and inactive Mg2+ with compatible radii stabilizing structure.

  59. Full Papers

    1. Electrospun NaVPO4F/C Nanofibers as Self-Standing Cathode Material for Ultralong Cycle Life Na-Ion Batteries

      Ting Jin, Yongchang Liu, Yang Li, Kangzhe Cao, Xiaojun Wang and Lifang Jiao

      Version of Record online: 24 APR 2017 | DOI: 10.1002/aenm.201700087

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      NaVPO4F/C nanofibers are synthesized with NaVPO4F nanoparticles (≈6 nm) embedded in porous carbon matrix via an electrospinning method. For Na-storage, NaVPO4F/C nanofibers exhibit extraordinary electrochemical performance: a high capacity (126.3 mA h g−1 at 1 C), a superior rate capability (61.2 mA h g−1 at 50 C), and ultralong cyclability (96.5% capacity retention after 1000 cycles at 2 C).

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