Synthesis and Electrochemical Performance of Graphene-like WS2

Authors

  • Dr. Xiangpeng Fang,

    1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China), Fax: (+86) 10-82649050
    2. Dongguan Amperex Technology Limited, Dongguan, 523808 (China)
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  • Dr. Chunxiu Hua,

    1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China), Fax: (+86) 10-82649050
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  • Chengren Wu,

    1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China), Fax: (+86) 10-82649050
    2. Dongguan Amperex Technology Limited, Dongguan, 523808 (China)
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  • Xuefeng Wang,

    1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China), Fax: (+86) 10-82649050
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  • Dr. Lanyao Shen,

    1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China), Fax: (+86) 10-82649050
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  • Dr. Qingyu Kong,

    Corresponding author
    1. Société Civile Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin-BP 48, Gif-sur-Yvette Cedex, 91192 (France), Fax: (+33) 01-69359456
    • Société Civile Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin-BP 48, Gif-sur-Yvette Cedex, 91192 (France), Fax: (+33) 01-69359456
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  • Dr. Jiazhao Wang,

    1. Institute for Superconducting and Electronic Materials, University of Wollongong, Squires Way, Fairy Meadow, NSW 2519 (Australia)
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  • Prof. Yongsheng Hu,

    1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China), Fax: (+86) 10-82649050
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  • Prof. Zhaoxiang Wang,

    Corresponding author
    1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China), Fax: (+86) 10-82649050
    • Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China), Fax: (+86) 10-82649050
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  • Prof. Liquan Chen

    1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China), Fax: (+86) 10-82649050
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Abstract

Graphene-like and platelike WS2 were obtained by solid-state reactions. High-resolution (HR) TEM, BET, and Raman scattering studies show that the graphene-like WS2 is a few-layer-structured material. It exhibits better electrochemical performances than the platelike WS2. Structural characterization indicates that metallic W and Li2S are the end products of discharge (0.01 V versus Li+/Li), whereas metallic W and S are the recharge (3.00 V) products. In addition, X-ray absorption near-edge structure (XANES) characterization shows that the d electrons of W deviate towards the Li (or S) atom during the discharge/charge process, thus forming a weak bond between W and Li2S (or S).

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