Advanced Energy Materials

Cover image for Vol. 6 Issue 3

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

Editor-in-Chief: Joern Ritterbusch, Deputy Editor: Guangchen Xu

Impact Factor: 16.146

ISI Journal Citation Reports © Ranking: 2014: 3/89 (Energy & Fuels); 4/139 (Chemistry Physical); 4/144 (Physics Applied); 4/67 (Physics Condensed Matter); 5/260 (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 Optical Materials, Advanced Science, Energy Technology, Fuel Cells, Particle & Particle Systems Characterization, Small

  1. Communications

    1. Enhanced Electro-Optical Properties of Nanocone/Nanopillar Dual-Structured Arrays for Ultrathin Silicon/Organic Hybrid Solar Cell Applications

      Jian He, Zhenhai Yang, Peipei Liu, Sudong Wu, Pingqi Gao, Mei Wang, Suqiong Zhou, Xiaofeng Li, Hongtao Cao and Jichun Ye

      Article first published online: 25 JAN 2016 | DOI: 10.1002/aenm.201501793

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      Periodic nanocone–nanopillar dual-structured arrays are wet chemical etched on 20 μm-thick crystalline silicon substrates, enabling the realization of excellent light absorption properties and enhanced electrical contact with PEDOT:PSS. The finally textured silicon/PEDOT:PSS thin film hybrid solar cell shows a power conversion efficiency of 12.2%. These results provide a viable route toward high-performance thin film silicon/polymer hybrid cells by shape-controlled nanotexturing.

    2. Atomic Layer-by-Layer Co3O4/Graphene Composite for High Performance Lithium-Ion Batteries

      Yuhai Dou, Jiantie Xu, Boyang Ruan, Qiannan Liu, Yuede Pan, Ziqi Sun and Shi Xue Dou

      Article first published online: 25 JAN 2016 | DOI: 10.1002/aenm.201501835

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      An “atomic layer-by-layer” structure of Co3O4/graphene is developed as an anode material for lithium-ion batteries. Due to the atomic thickness of both the Co3O4 nanosheets and the graphene, the composite exhibits an ultrahigh specific capacity of 1134.4 mAh g−1 and an ultralong life up to 2000 cycles at 2.25 C, far beyond the performances of previously reported Co3O4/C composites.

  2. Full Papers

    1. New Insights into Defect-Mediated Heterostructures for Photoelectrochemical Water Splitting

      Xiaoqiang An, Tong Li, Bo Wen, Junwang Tang, Ziyu Hu, Li-Min Liu, Jiuhui Qu, C. P. Huang and Huijuan Liu

      Article first published online: 25 JAN 2016 | DOI: 10.1002/aenm.201502268

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      The potential of defect engineering in the synthesis of defect-mediated heterostructures is investigated. Both experimental observations and theoretical calculations demonstrate the spontaneous formation of defect-mediated interfaces in TiO2/BiVO4 heterojunctions. The synergetic effect between defective interfaces and quantum dots sensitization results in significantly increased photoconversion efficiency, which provides a new paradigm for designing photoelectrodes for solar fuel production.

    2. Lithium Doping to Enhance Thermoelectric Performance of MgAgSb with Weak Electron–Phonon Coupling

      Zihang Liu, Yumei Wang, Jun Mao, Huiyuan Geng, Jing Shuai, Yuanxu Wang, Ran He, Wei Cai, Jiehe Sui and Zhifeng Ren

      Article first published online: 25 JAN 2016 | DOI: 10.1002/aenm.201502269

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      Intrinsically weak electron–phonon coupling, reflected by the low deformation potential Edef ≈ 6.3 eV, plays a crucial role in the relatively high power factor of undoped MgAgSb. The optimized carrier concentration by Li doping leads to a sharp reduction in resistivity and significantly enhances the power factor (PF). Low lattice thermal conductivity can be simultaneously achieved via all-scale hierarchical phonon scattering architecture. Collectively, much higher (PF)ave ≈ 25 μW cm−1 K−2 with a high (ZT)ave ≈ 1.1 from 300 to 548 K is achieved for 0.01 Li doping.

    3. Operando Lithium Dynamics in the Li-Rich Layered Oxide Cathode Material via Neutron Diffraction

      Haodong Liu, Yan Chen, Sunny Hy, Ke An, Subramanian Venkatachalam, Danna Qian, Minghao Zhang and Ying Shirley Meng

      Article first published online: 25 JAN 2016 | DOI: 10.1002/aenm.201502143

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      The lithium and oxygen dynamics of two Li-rich compounds are investigated and compared via neutron diffraction under operando battery cycling to show the path-dependent rate of lithium migration from the lithium layer and transition metal layer is asymmetric for charging and discharging revealing the origin of irreversible lithium loss.

    4. Band Edge Engineering of Oxide Photoanodes for Photoelectrochemical Water Splitting: Integration of Subsurface Dipoles with Atomic-Scale Control

      Yasuyuki Hikita, Kazunori Nishio, Linsey C. Seitz, Pongkarn Chakthranont, Takashi Tachikawa, Thomas F. Jaramillo and Harold Y. Hwang

      Article first published online: 22 JAN 2016 | DOI: 10.1002/aenm.201502154

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      Flat band potential at an oxide semiconductor/aqueous electrolyte interface is systematically shifted over 1.3 V by atomically engineering an electrostatic dipole layer near this interface. Coherent stacking of polar oxide surfaces stabilizes a large internal electric field over atomic distances. This technique enables the decoupling of the bulk and interface constraints in designing photoelectrodes using complex oxides.

    5. Electrochemical Stability of Li10GeP2S12 and Li7La3Zr2O12 Solid Electrolytes

      Fudong Han, Yizhou Zhu, Xingfeng He, Yifei Mo and Chunsheng Wang

      Article first published online: 21 JAN 2016 | DOI: 10.1002/aenm.201501590

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      The thermodynamic electrochemical stability windows of Li10GeP2S12 and Li7La3Zr2O12 are calculated using first principles computation method, and also experimentally validated using a Li/electrolyte/electrolyte-carbon cell developed by us. Both solid electrolyte materials have narrower electrochemical windows than previously claimed by the battery community. These results can provide valuable information to address the most challenging interfacial problem for high-performance all-solid-state batteries.

    6. A Layer-Structured Electrode Material Reformed by a PO4-O2 Hybrid Framework toward Enhanced Lithium Storage and Stability

      Sul Hee Min, Mi Ru Jo, Si-Young Choi, Yong-Il Kim and Yong-Mook Kang

      Article first published online: 21 JAN 2016 | DOI: 10.1002/aenm.201501717

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      Improvement of the structure and surface stabilities of a LiCoO2 cathode is demonstrated by changing the surface design from an O2-framework to a PO4-framework of LiCoO2. With its advantages of easy synthesis, high structural stability, and high-surface stability from chemical attack, this surface modified LiCoO2 (phosphidated LiCoO2) shows great potential for use in lithium rechargeable batteries at high-voltage ranges.

    7. Solvent Engineering Boosts the Efficiency of Paintable Carbon-Based Perovskite Solar Cells to Beyond 14%

      Haining Chen, Zhanhua Wei, Hexiang He, Xiaoli Zheng, Kam Sing Wong and Shihe Yang

      Article first published online: 19 JAN 2016 | DOI: 10.1002/aenm.201502087

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      A solvent engineering strategy based on the two-step sequential method is exploited to prepare a high-quality perovskite layer for high-performance paintable carbon-based, hole transport material-free perovskite solar cells (14.38%). By lowering the solvent polarity for CH3NH3I solution, the conversion of PbI2 is accelerated and the Ostwald ripening process is suppressed, leading to an even perovskite layer with enhanced interface (perovskite/carbon) contact and performance.

  3. Communications

    1. Armoring Graphene Cathodes for High-Rate and Long-Life Lithium Ion Supercapacitors

      Xu-Yi Shan, Yuzuo Wang, Da-Wei Wang, Feng Li and Hui-Ming Cheng

      Article first published online: 19 JAN 2016 | DOI: 10.1002/aenm.201502064

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      An armored graphene cathode is developed for high rate and long-life lithium ion supercapacitors by the preliminary electrochemical coating. The obtained full-cell delivers a high energy density of 160 Wh kg−1 and a very small capacity decay of 0.011% per cycle indicating a potential prospect.

  4. Full Papers

    1. Going Beyond Lithium Hybrid Capacitors: Proposing a New High-Performing Sodium Hybrid Capacitor System for Next-Generation Hybrid Vehicles Made with Bio-Inspired Activated Carbon

      Ranjith Thangavel, Karthikeyan Kaliyappan, Kisuk Kang, Xueliang Sun and Yun-Sung Lee

      Article first published online: 19 JAN 2016 | DOI: 10.1002/aenm.201502199

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      A high-performing sodium hybrid capacitor is fabricated with Na3V2(PO4)3 and carbon derived from cinnamon sticks in an organic electrolyte. Excellent stability of 95% after 10 000 cycles at 1.1 mA cm−2 along with superior power density of 850 W kg−1 and energy density of 60 Wh kg−1 are achieved.

  5. Reviews

    1. Highly Efficient Materials Assembly Via Electrophoretic Deposition for Electrochemical Energy Conversion and Storage Devices

      Luhan Ye, Kechun Wen, Zuoxiang Zhang, Fei Yang, Yachun Liang, Weiqiang Lv, Yukun Lin, Jianmin Gu, James H. Dickerson and Weidong He

      Article first published online: 18 JAN 2016 | DOI: 10.1002/aenm.201502018

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      An overview of the electrophoretic deposition (EPD) technique for electro­chemical energy conversion and storage applications is presented. High-performance EPD electrochemical devices are discussed to illustrate the developing status of the promising method. Prospectives for further advances in EPD are also proposed.

  6. Full Papers

    1. Graphitic Nanoshell/Mesoporous Carbon Nanohybrids as Highly Efficient and Stable Bifunctional Oxygen Electrocatalysts for Rechargeable Aqueous Na–Air Batteries

      Jae Yeong Cheon, Kyoungho Kim, Young Jin Sa, Sun Hye Sahgong, Yugyeong Hong, Jinwoo Woo, Sung-Dae Yim, Hu Young Jeong, Youngsik Kim and Sang Hoon Joo

      Article first published online: 18 JAN 2016 | DOI: 10.1002/aenm.201501794

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      Highly integrated graphitic nanoshell/mesoporous carbon (GNS/MC) nanohybrids are prepared and show excellent catalytic activity and durability for oxygen evolution and reduction reactions. The design of GNS/MC allows for the combination of highly integrated, multiple structural motifs responsible for oxygen evolution and oxygen reduction reaction. Significantly, the GNS/MC is exploited as high-performance air cathode for the first demonstration of rechargeable aqueous Na–air battery.

  7. Communications

    1. Silk Nanofiber-Networked Bio-Triboelectric Generator: Silk Bio-TEG

      Hyun-Jun Kim, Jae-Hwan Kim, Ki-Woo Jun, Jong-Hun Kim, Wan-Chul Seung, Oh Hyeong Kwon, Jeong-Young Park, Sang-Woo Kim and Il-Kwon Oh

      Article first published online: 18 JAN 2016 | DOI: 10.1002/aenm.201502329

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      A silk nanofiber-networked bio-triboelectric generator (Silk Bio-TEG) is developed by using an eco-friendly and sustainable silk biomaterial with strong hydrogen bonding between peptide blocks. The electrospun Silk Bio-TEG shows highly durable and reliable energy harvesting performances due to its notably high surface-to-volume ratio, mechanically super-strong silk fibers, and fracture tolerant behavior of nanofiber-networks.

    2. Hierarchically Porous Nickel Sulfide Multifunctional Superstructures

      Bo You and Yujie Sun

      Article first published online: 18 JAN 2016 | DOI: 10.1002/aenm.201502333

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      Multifunctional nickel sulfide superstructures (h-NiSx) with 3D hierarchically porosity are prepared by template-free electrodeposition of porous metallic Ni microspheres arrays on a nickel foam and subsequent low-temperature sulfurization. With the designed nanoscale architecture, the resulting h-NiSx exhibit superior performance and strong robustness for overall water splitting electrocatalysis and capacitance application in alkaline electrolytes.

    3. Cross-Linked Chitosan as a Polymer Network Binder for an Antimony Anode in Sodium-Ion Batteries

      Hongcai Gao, Weidong Zhou, Ji-Hoon Jang and John B. Goodenough

      Article first published online: 18 JAN 2016 | DOI: 10.1002/aenm.201502130

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      A polymer network from a cross-linking chemistry between chitosan and glutaraldehyde is designed for a high performance antimony anode in sodium-ion batteries. The polymer network can mitigate efficiently the volume change of antimony anode upon sodiation/desodiation, leading to excellent cycling stability and high Coulombic efficiency.

    4. Etching-in-a-Box: A Novel Strategy to Synthesize Unique Yolk-Shelled Fe3O4@Carbon with an Ultralong Cycling Life for Lithium Storage

      Zhiming Liu, Xin-Yao Yu and Ungyu Paik

      Article first published online: 18 JAN 2016 | DOI: 10.1002/aenm.201502318

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      An etching-in-a-box strategy is developed to synthesize unique Fe3O4@C yolk-shelled nanocubes. Interestingly, inner cavities are generated in Fe3O4 cores during the etching process. With an optimized etching time of 2 h, an ultralong cycling life is achieved, in which even after 8000 cycles the material can still deliver a significant capacity of 475 mAh g−1 at 10 A g−1.

    5. Tailoring a New 4V-Class Cathode Material for Na-Ion Batteries

      Jongsoon Kim, Inchul Park, Hyungsub Kim, Kyu-Young Park, Young-Uk Park and Kisuk Kang

      Article first published online: 18 JAN 2016 | DOI: 10.1002/aenm.201502147

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      Na7V3(P2O7)4 is capable of exhibiting 4.13 V of the redox potential as a cathode material for Na ion batteires, as revealed by the structural and electrochemical characterizations from first-principles calculations and experiments. The cyclability of Na7V3(P2O7)4 is respectably stable (75% retention after 600 cycles), which is attributed to the low volume change (1%) during cycling.

  8. Full Papers

    1. Hard Carbon Anodes and Novel Electrolytes for Long-Cycle-Life Room Temperature Sodium-Sulfur Full Cell Batteries

      M. Kohl, F. Borrmann, H. Althues and S. Kaskel

      Article first published online: 14 JAN 2016 | DOI: 10.1002/aenm.201502185

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      A unique combination of the presodiation of hard carbon anodes, in a tailored NaPF6, diethyl carbonate, ethylene carbonate, and fluoroethylene carbonate containing an electrolyte, and the use of an Na2S/P2S5 doped tetraethylene glycol dimethyl ether electrolyte in subsequent full cells, leads to stable sodium-sulfur batteries operable at room temperature with discharge capacities up to 980 mAh g−1sulfur and 1000 reversible cycles.

  9. Communications

    1. High-Density Monolith of N-Doped Holey Graphene for Ultrahigh Volumetric Capacity of Li-Ion Batteries

      Xiaopeng Wang, Lingxiao Lv, Zhihua Cheng, Jian Gao, Liye Dong, Chuangang Hu and Liangti Qu

      Article first published online: 14 JAN 2016 | DOI: 10.1002/aenm.201502100

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      A convenient and scalable strategy to prepare N-doped holey-graphene monolith (NHGM) electrodes with high volumetric capacity for lithium-ion batteries is shown. The holey-graphene sheets are an excellent material featuring a high Li-ion storage, unimpeded ion channels, and high volumetric capacity. NHGM possesses the advantageous features of a high packing density, efficient ion channels, and favorable mass transport, resulting in a high volumetric capacity, high rate capability, and excellent stability as anode material for lithium-ion batteries.