Advanced Energy Materials

Cover image for Vol. 4 Issue 1

January 7, 2014

Volume 4, Issue 1

Pages 1–7

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Editorial
    8. Reviews
    9. Communications
    10. Full Papers
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      Energy Storage: Application of Redox Non-Innocent Ligands to Non-Aqueous Flow Battery Electrolytes (Adv. Energy Mater. 1/2014)

      Patrick J. Cappillino, Harry D. Pratt III, Nicholas S. Hudak, Neil C. Tomson, Travis M. Anderson and Mitchell R. Anstey

      Version of Record online: 6 JAN 2014 | DOI: 10.1002/aenm.201470001

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      Increasing the stability and energy density are key factors in the development and eventual acceptance of redox flow batteries for grid-scale energy storage. In article 1300566, Travis M. Anderson, Mitchell R. Anstey, and co-workers demonstrate that electrolytes comprising redox “non-innocent” ligands, which store equivalents of charge separate from the metal center, are a new avenue for electrical energy storage.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Editorial
    8. Reviews
    9. Communications
    10. Full Papers
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      Photoelectrochemical Reactions: All-Surface-Atomic-Metal Chalcogenide Sheets for High-Efficiency Visible-Light Photoelectrochemical Water Splitting (Adv. Energy Mater. 1/2014)

      Yongfu Sun, Zhihu Sun, Shan Gao, Hao Cheng, Qinghua Liu, Fengcai Lei, Shiqiang Wei and Yi Xie

      Version of Record online: 6 JAN 2014 | DOI: 10.1002/aenm.201470002

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      In article 1300611, Shiqiang Wei, Yi Xie, and co-workers describe the first synthesis of freestanding all-surface-atomic SnS sheets via a convenient and scalable liquid exfoliation strategy. The photoelectrode realizes a visible light conversion efficiency of 67.1% at 490 nm, which is much higher than the efficiency of other visible-light-driven water splitting. This is therefore very promising for overcoming the limited supply of fossil fuels and serious environmental problems.

  3. Back Cover

    1. Top of page
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    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Editorial
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      Flexible Electronics: Extremely Flexible Transparent Conducting Electrodes for Organic Devices (Adv. Energy Mater. 1/2014)

      Sunghoon Jung, Sunghun Lee, Myungkwan Song, Do-Geun Kim, Dae Sung You, Jong-Kuk Kim, Chang Su Kim, Tae-Min Kim, Kwon-Hyeon Kim, Jang-Joo Kim and Jae-Wook Kang

      Version of Record online: 6 JAN 2014 | DOI: 10.1002/aenm.201470005

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      In article 1300474, Jang-Joo Kim, Jae-Wook Kang, and co-workers report the development of extremely flexible transparent conducting electrodes for organic device applications. The electrodes are fabricated using a combination of metal-embedding architecture into a plastic substrate and ultrathin transparent electrodes and they exhibit high conductivity and extreme flexibility. These electrodes are used to fabricate flexible organic solar cells and organic light-emitting diodes that exhibit performances similar or superior to those of devices fabricated on glass substrates.

  4. Masthead

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      Masthead: (Adv. Energy Mater. 1/2014)

      Version of Record online: 6 JAN 2014 | DOI: 10.1002/aenm.201470004

  5. Contents

    1. Top of page
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    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Editorial
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    1. You have free access to this content
      Contents: (Adv. Energy Mater. 1/2014)

      Version of Record online: 6 JAN 2014 | DOI: 10.1002/aenm.201470003

  6. Editorial

    1. Top of page
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    3. Inside Front Cover
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      Electrons Edge Paper

      Dr. Martin Ottmar

      Version of Record online: 6 JAN 2014 | DOI: 10.1002/aenm.201301009

  7. Reviews

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    1. Graphene-Based Materials for Solar Cell Applications

      Zongyou Yin, Jixin Zhu, Qiyuan He, Xiehong Cao, Chaoliang Tan, Hongyu Chen, Qingyu Yan and Hua Zhang

      Version of Record online: 23 SEP 2013 | DOI: 10.1002/aenm.201300574

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      Graphene has attracted increasing attention because of its unique electrical, optical, optoelectronic, and mechanical properties, which have provided many opportunities for its application. An overview of the recent research on graphene and its derivatives is presented, with a particular focus on synthesis, properties, and applications in solar cells.

    2. Silicon-Based Nanomaterials for Lithium-Ion Batteries: A Review

      Xin Su, Qingliu Wu, Juchuan Li, Xingcheng Xiao, Amber Lott, Wenquan Lu, Brian W. Sheldon and Ji Wu

      Version of Record online: 1 OCT 2013 | DOI: 10.1002/aenm.201300882

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      The most recent advance in the applications of 0D (nanoparticles), 1D (nanowires and nanotubes), and 2D (thin film) silicon nanomaterials in lithium ion batteries (LIBs) are summarized. The synthetic routes, electrochemical performance, and underlying reaction mechanisms of these nanomaterials are described and the advantages and limitations using nanostructured silicon in LIBs are also discussed.

  8. Communications

    1. Top of page
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    1. Small-Molecule Solar Cells with Fill Factors up to 0.75 via a Layer-by-Layer Solution Process

      Yuze Lin, Lanchao Ma, Yongfang Li, Yunqi Liu, Daoben Zhu and Xiaowei Zhan

      Version of Record online: 6 AUG 2013 | DOI: 10.1002/aenm.201300626

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      An oligothiophene-based molecule (BDT-3T-CA) using a molecular engineering approach is applied to solution-processed layer-by-layer solar cells. The solar cells based on BDT-3T-CA/PC61BM (a fullerene derivative) exhibit power conversion efficiency (PCE) values as high as 4.16% and fill factor (FF) values up to 0.75. The FF of 0.75 is the highest value reported for solution processed small molecule solar cells.

    2. Surface-Coverage-Dependent Cycle Stability of Core-Shell Nanostructured Electrodes for Use in Lithium Ion Batteries

      Sangkyu Lee, Jaehwan Ha, Huanyu Cheng, Jung Woo Lee, Tae Sik Jang, Yeon-Gil Jung, Yonggang Huang, John A. Rogers and Ungyu Paik

      Version of Record online: 31 JUL 2013 | DOI: 10.1002/aenm.201300472

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      The relationship between surface coverage of the shell layer in core-shell nanostructured electrodes and the resulting electrochemical performance of the electrodes is described. Systematic studies and theoretical modeling reveal that partially covered core-shell nanostructured electrodes are beneficial to release the stress induced by lithiation and delithiation, leading to the excellent cycle performance without any capacity fading up to 50 cycles.

    3. Li2S-Carbon Sandwiched Electrodes with Superior Performance for Lithium-Sulfur Batteries

      Yongzhu Fu, Yu-Sheng Su and Arumugam Manthiram

      Version of Record online: 15 AUG 2013 | DOI: 10.1002/aenm.201300655

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      A sandwiched electrode containing pristine Li2S powder in between two layers of binder-free carbon nanotube electrodes is developed. The carbon matrix provides an ion and electron accessible environment, and a space for trapping the active material. Exceptionally high capacities with superior stability and rate capability are obtained.

    4. Electrochemical Deuteration of Metastable MgTi Alloys: An Effective Way to Inhibit Phase Segregation

      Thirugnasambandam G. Manivasagam, Pieter C. M. M. Magusin, Subramanian Srinivasan, Gopi Krishnan, Bart J. Kooi and Peter H. L. Notten

      Version of Record online: 1 SEP 2013 | DOI: 10.1002/aenm.201300590

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      Electrochemical deuteration of metastable Mg-Ti alloys is studied. To investigate the dynamics of deuterium atoms in the crystal host, the as-prepared hydrides are examined by means of NMR spectroscopy. Remarkably the host compound, which phase segregates upon gas phase deuteration at high temperatures, preserves its original structure during low temperature electrochemical deuteration. Deuterium atoms exchange dynamically between Mg-rich and Ti-rich sites.

    5. Solution-Processed Rhenium Oxide: A Versatile Anode Buffer Layer for High Performance Polymer Solar Cells with Enhanced Light Harvest

      Zhan'ao Tan, Liangjie Li, Fuzhi Wang, Qi Xu, Shusheng Li, Gang Sun, Xiaohe Tu, Xuliang Hou, Jianhui Hou and Yongfang Li

      Version of Record online: 16 AUG 2013 | DOI: 10.1002/aenm.201300884

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      High efficiency polymer solar cells using solution processed s-ReOx as the anode buffer layer are demonstrated. The s-ReOx layer can effectively change the light distribution within the photoactive layer and enhance its absorption. The solution-processable s-ReOx is a promising anode buffer layer material for high performance PSCs

    6. Application of Redox Non-Innocent Ligands to Non-Aqueous Flow Battery Electrolytes

      Patrick J. Cappillino, Harry D. Pratt III, Nicholas S. Hudak, Neil C. Tomson, Travis M. Anderson and Mitchell R. Anstey

      Version of Record online: 11 SEP 2013 | DOI: 10.1002/aenm.201300566

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      High energy-density, redox flow batteries (RFB) can provide cost-effective, grid-scale energy storage, facilitating the use of intermittent sources such as solar and wind power. A new electrolyte based on vanadium and redox-active ligands that stores equivalents of charge separately from the metal center is presented. Electrolytes composed of non-innocent ligands greatly enhance both the energy density and stability of non-aqueous RFBs

  9. Full Papers

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Editorial
    8. Reviews
    9. Communications
    10. Full Papers
    1. Engineering Grain Boundaries in Cu2ZnSnSe4 for Better Cell Performance: A First-Principle Study

      Wan-Jian Yin, Yelong Wu, Su-Huai Wei, Rommel Noufi, Mowafak M. Al-Jassim and Yanfa Yan

      Version of Record online: 14 AUG 2013 | DOI: 10.1002/aenm.201300712

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      The intrinsic grain boundaries of Cu2ZnSnSe4 introduce deep gap states and act as Shockley-Read-Hall recombination centers. The segregation of defects such as ZnSn, Na+i, and OSe eliminates the gaps states and produces the band bending around grain boundaries. The efficiencies of Cu2ZnSnSe4-based solar cell are expected to be further enhanced by proper treatment at grain boundaries.

    2. Understanding the Degradation Mechanisms of LiNi0.5Co0.2Mn0.3O2 Cathode Material in Lithium Ion Batteries

      Sung-Kyun Jung, Hyeokjo Gwon, Jihyun Hong, Kyu-Young Park, Dong-Hwa Seo, Haegyeom Kim, Jangsuk Hyun, Wooyoung Yang and Kisuk Kang

      Version of Record online: 21 AUG 2013 | DOI: 10.1002/aenm.201300787

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      The degradation mechanisms of LiNi0.5Co0.2Mn0.3O2 are investigated during cycling under high voltage conditions. The results indicate that the structural degradation occurs mainly on the surface of the materials where the phase transformation from rhombohedral to spinel is dominant. However, depending on the cutoff voltage, the formation of the rock salt phase can also occur, which is suspected to increase the charge transfer resistance

    3. Extremely Flexible Transparent Conducting Electrodes for Organic Devices

      Sunghoon Jung, Sunghun Lee, Myungkwan Song, Do-Geun Kim, Dae Sung You, Jong-Kuk Kim, Chang Su Kim, Tae-Min Kim, Kwon-Hyeon Kim, Jang-Joo Kim and Jae-Wook Kang

      Version of Record online: 23 JUL 2013 | DOI: 10.1002/aenm.201300474

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      Extremely flexible organic devices using a metal-embedded flexible substrate are designed and fabricated. The use of a metal grid and an indium tin oxide (ITO) film in combination results in an increase in conductivity without a reduction in the transmission. Additionally, the fabricated flexible devices do not show degradation in their performance even after being folded with a radius of ≈200 μm.

    4. The Effect of PCBM Dimerization on the Performance of Bulk Heterojunction Solar Cells

      Andreas Distler, Tobias Sauermann, Hans-Joachim Egelhaaf, Sheila Rodman, Dave Waller, Kap-Soo Cheon, Mike Lee and Dirk M. Guldi

      Version of Record online: 6 AUG 2013 | DOI: 10.1002/aenm.201300693

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      The light stability of poly[4,4′-bis(2-ethylhexyl)dithieno[3,2-b:2′,3′-d]silole)-2,6-diyl-alt-[2,5-bis(3-tetradecylthiophen-2-yl)thiazole[5,4-d]thiazole)-1,8-diyl] (PDTSTzTz):[6,6]-phenyl-C61-butyric acid methyl ester (PC60BM) solar cells is investigated. The photoinduced dimerization of the fullerene is responsible for the observed degradation. Both the dimerization and the associated device performance loss are found to be reversible upon annealing. The use of bisPC60BM prevents this degradation mechanism.

      Corrected by:

      Correction: The Effect of PCBM Dimerization on the Performance of Bulk Heterojunction Solar Cells

      Vol. 4, Issue 4, Version of Record online: 11 MAR 2014

    5. A Composite Gel Polymer Electrolyte with High Performance Based on Poly(Vinylidene Fluoride) and Polyborate for Lithium Ion Batteries

      Yusong Zhu, Shiying Xiao, Yi Shi, Yaqiong Yang, Yuyang Hou and Yuping Wu

      Version of Record online: 12 AUG 2013 | DOI: 10.1002/aenm.201300647

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      A composite membrane of a single-ion conductor, lithium polyvinyl alcohol oxalate borate (LiPVAOB), with electrospun poly(vinylidene fluoride), exhibits high safety, high conductivity for Li+ ions, slow evaporation of liquid electrolytes, and small overpotentials.

    6. All-Surface-Atomic-Metal Chalcogenide Sheets for High-Efficiency Visible-Light Photoelectrochemical Water Splitting

      Yongfu Sun, Zhihu Sun, Shan Gao, Hao Cheng, Qinghua Liu, Fengcai Lei, Shiqiang Wei and Yi Xie

      Version of Record online: 23 JUL 2013 | DOI: 10.1002/aenm.201300611

      Thumbnail image of graphical abstract

      All-surface-atomic semiconductors of SnS and SnSe freestanding sheets are synthesized using a scalable and convenient strategy. The all-surface-atomic SnS sheet-based photoelectrodes exhibit an incident photon-to-current conversion efficiency that is superior to that of other visible-light-driven water splitting. This allows manipulation of the basic properties of advanced materials on the atomic scale.

    7. Charge Storage Capacity of Renewable Biopolymer/Conjugated Polymer Interpenetrating Networks Enhanced by Electroactive Dopants

      D. H. Nagaraju, Tomasz Rebis, Roger Gabrielsson, Anders Elfwing, Grzegorz Milczarek and Olle Inganäs

      Version of Record online: 14 AUG 2013 | DOI: 10.1002/aenm.201300443

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      A renewable, inexpensive, brown liquor by-product of the paper industry, called lignin (biopolymer), forms interpenetrating networks with conjugated polymer and is used for charge storage. The goal is to understand and to improve the charge storage capacity of the biopolymer/conjugated polymer interpenetrating networks. The charge storage capacity of the interpenetrating networks is significantly enhanced by co-inserting the electroactive dopant.

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