Peapod-Like Composite with Nickel Phosphide Nanoparticles Encapsulated in Carbon Fibers as Enhanced Anode for Li-Ion Batteries

Authors

  • Dr. Huijuan Zhang,

    1. School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044 (PR China)
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  • Yangyang Feng,

    1. School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044 (PR China)
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  • Yan Zhang,

    1. School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044 (PR China)
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  • Ling Fang,

    1. School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044 (PR China)
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  • Wenxiang Li,

    1. School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044 (PR China)
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  • Prof. Qing Liu,

    Corresponding author
    1. School of Materials Science and Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044 (PR China)
    • Qing Liu, School of Materials Science and Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044 (PR China)===

      Kai Wu, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 (PR China)===

      Yu Wang, School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044 (PR China)===

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  • Prof. Kai Wu,

    Corresponding author
    1. Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 (PR China)
    • Qing Liu, School of Materials Science and Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044 (PR China)===

      Kai Wu, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 (PR China)===

      Yu Wang, School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044 (PR China)===

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  • Prof. Yu Wang

    Corresponding author
    1. School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044 (PR China)
    • Qing Liu, School of Materials Science and Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044 (PR China)===

      Kai Wu, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 (PR China)===

      Yu Wang, School of Chemistry and Chemical Engineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City 400044 (PR China)===

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Abstract

Herein, we introduce a peapod-like composite with Ni12P5 nanoparticles encapsulated in carbon fibers as the enhanced anode in Li-ion batteries for the first time. In the synthesis, NiNH4PO4H2O nanorods act as precursors and sacrificial templates, and glucose molecules serve as the green carbon source. With the aid of hydrogen bonding between the precursor and carbon source, a polymer layer is hydrothermally formed and then rationally converted into carbon fibers upon inert calcination at elevated temperatures. Meanwhile, NiNH4PO4H2O nanorods simultaneously turn into Ni12P5 nanoparticles encapsulated in carbon fibers by undergoing a decomposition and reduction process induced by high temperature and the carbon fibers. The obtained composite performs excellently as a Li-ion batteries anode relative to pure-phase materials. Specific capacity can reach 600 mAh g−1 over 200 cycles, which is much higher than that of isolated graphitized carbon or phosphides, and reasonably believed to originate from the synergistic effect based on the combination of Ni12P5 nanoparticles and carbon fibers. Due to the benignity, sustainability, low cost, and abundance of raw materials of the peapod-like composite, numerous potential applications, in fields such as optoelectronics, electronics, specific catalysis, gas sensing, and biotechnology can be envisaged.

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