Get access
Advertisement

Controllable Synthesis of a Monophase Nickel Phosphide/Carbon (Ni5P4/C) Composite Electrode via Wet-Chemistry and a Solid-State Reaction for the Anode in Lithium Secondary Batteries

Authors

  • Yi Lu,

    1. State Key Laboratory of Silicon Materials and Department of Materials, Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
    Search for more papers by this author
  • Jiang-Ping Tu,

    Corresponding author
    1. State Key Laboratory of Silicon Materials and Department of Materials, Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
    • State Key Laboratory of Silicon Materials and Department of Materials, Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.
    Search for more papers by this author
  • Qin-Qin Xiong,

    1. State Key Laboratory of Silicon Materials and Department of Materials, Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
    Search for more papers by this author
  • Jia-Yuan Xiang,

    1. Narada Power Source Co. Ltd., Hangzhou, 311105, P.R. China
    Search for more papers by this author
  • Yong-Jin Mai,

    1. State Key Laboratory of Silicon Materials and Department of Materials, Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
    Search for more papers by this author
  • Jun Zhang,

    1. State Key Laboratory of Silicon Materials and Department of Materials, Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
    Search for more papers by this author
  • Yan-Qiang Qiao,

    1. State Key Laboratory of Silicon Materials and Department of Materials, Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
    Search for more papers by this author
  • Xiu-Li Wang,

    Corresponding author
    1. State Key Laboratory of Silicon Materials and Department of Materials, Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
    • State Key Laboratory of Silicon Materials and Department of Materials, Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.
    Search for more papers by this author
  • Chang-Dong Gu,

    1. State Key Laboratory of Silicon Materials and Department of Materials, Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
    Search for more papers by this author
  • Scott X. Mao

    1. Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA 15261, USA
    Search for more papers by this author

Abstract

A monophase nickel phosphide/carbon (Ni5P4/C) composite with a thin carbon shell is controllably synthesized via the two-step strategy of a wet-chemistry reaction and a solid-state reaction. In this fabrication, the further diffusion of phosphorus atoms in the carbon shell during the solid-state reaction can be responsible for a chemical transformation from a binary phase of Ni5P4-Ni2P to monophase Ni5P4. Galvanostatic charge-discharge measurements indicate that the Ni5P4/C composite exhibits a superior, high rate capacibility and good cycling stability. About 76.6% of the second capacity (644.1 mA h g−1) can be retained after 50 cycles at a 0.1 C rate. At a high rate of 3 C, the specific capacity of Ni5P4/C is still as high as 357.1 mA h g−1. Importantly, the amorphous carbon shell can enhance the conductivity of the composite and suppress the aggregation of the active particles, leading to their structure stability and reversibility during cycling. As is confirmed from X-ray-diffraction analysis, no evident microstructural changes occur upon cycling. These results reveal that highly crystalline Ni5P4/C is one of the most promising anode materials for lithium-ion batteries.

Get access to the full text of this article

Ancillary