Get access

Electrochemically Fabricated Polypyrrole–Cobalt–Oxygen Coordination Complex as High-Performance Lithium-Storage Materials

Authors

  • Dr. Bingkun Guo,

    1. Laboratory for Solid State Ionics, Institute of Physics, Chinese Academy of Sciences, 8 Nansanjie Str. Zhongguancun, Beijing 100190 (P. R. China), Fax: (+86) 10-82649050
    Search for more papers by this author
  • Dr. Qingyu Kong,

    Corresponding author
    1. Société civile Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin-BP 48, 91192 Gif-sur-Yvette CEDEX (France)
    • Société civile Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin-BP 48, 91192 Gif-sur-Yvette CEDEX (France)
    Search for more papers by this author
  • Dr. Ying Zhu,

    1. School of Chemistry and Environment, Beijing University of Aeronautics and Astronautics, Beijing 100191 (P. R. China)
    Search for more papers by this author
  • Ya Mao,

    1. Laboratory for Solid State Ionics, Institute of Physics, Chinese Academy of Sciences, 8 Nansanjie Str. Zhongguancun, Beijing 100190 (P. R. China), Fax: (+86) 10-82649050
    Search for more papers by this author
  • Prof. Zhaoxiang Wang,

    Corresponding author
    1. Laboratory for Solid State Ionics, Institute of Physics, Chinese Academy of Sciences, 8 Nansanjie Str. Zhongguancun, Beijing 100190 (P. R. China), Fax: (+86) 10-82649050
    • Laboratory for Solid State Ionics, Institute of Physics, Chinese Academy of Sciences, 8 Nansanjie Str. Zhongguancun, Beijing 100190 (P. R. China), Fax: (+86) 10-82649050
    Search for more papers by this author
  • Prof. Meixiang Wan,

    1. Organic Solids Laboratory, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, (P. R. China)
    Search for more papers by this author
  • Liquan Chen

    1. Laboratory for Solid State Ionics, Institute of Physics, Chinese Academy of Sciences, 8 Nansanjie Str. Zhongguancun, Beijing 100190 (P. R. China), Fax: (+86) 10-82649050
    Search for more papers by this author

Abstract

Current lithium-ion battery (LIB) technologies are all based on inorganic electrode materials, though organic materials have been used as electrodes for years. Disadvantages such as limited thermal stability and low specific capacity hinder their applications. On the other hand, the transition metal oxides that provide high lithium-storage capacity by way of electrochemical conversion reaction suffer from poor cycling stability. Here we report a novel high-performance, organic, lithium-storage material, a polypyrrole–cobalt–oxygen (PPy-Co-O) coordination complex, with high lithium-storage capacity and excellent cycling stability. Extended X-ray absorption fine structure and Raman spectroscopy and other physical and electrochemical characterizations demonstrate that this coordination complex can be electrochemically fabricated by cycling PPy-coated Co3O4 between 0.0 V and 3.0 V versus Li+/Li. Density functional theory (DFT) calculations indicate that each cobalt atom coordinates with two nitrogen atoms within the PPy-Co coordination layer and the layers are connected with oxygen atoms between them. Coordination weakens the C[BOND]H bonds on PPy and makes the complex a novel lithium-storage material with high capacity and high cycling stability.

Get access to the full text of this article

Ancillary