中国物理B ›› 2018, Vol. 27 ›› Issue (8): 88201-088201.doi: 10.1088/1674-1056/27/8/088201

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Size effect of Si particles on the electrochemical performances of Si/C composite anodes

Bonan Liu(刘柏男), Hao Lu(陆浩), Geng Chu(褚赓), Fei Luo(罗飞), Jieyun Zheng(郑杰允), Shimou Chen(陈仕谋), Hong Li(李泓)   

  1. 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Key Laboratory of Green Process Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    4 Tianmu Energy Anode Material Ltd. Co., Changzhou 213300, China
  • 收稿日期:2018-04-29 修回日期:2018-05-24 出版日期:2018-08-05 发布日期:2018-08-05
  • 通讯作者: Hong Li E-mail:hli@iphy.ac.cn
  • 基金资助:

    Project supported from the “Strategic Priority Research Program” of the Chinese Academy of Sciences (Grant No. XDA09010102).

Size effect of Si particles on the electrochemical performances of Si/C composite anodes

Bonan Liu(刘柏男)1,2, Hao Lu(陆浩)1,2, Geng Chu(褚赓)3, Fei Luo(罗飞)4, Jieyun Zheng(郑杰允)1, Shimou Chen(陈仕谋)3, Hong Li(李泓)1,2   

  1. 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Key Laboratory of Green Process Engineering, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    4 Tianmu Energy Anode Material Ltd. Co., Changzhou 213300, China
  • Received:2018-04-29 Revised:2018-05-24 Online:2018-08-05 Published:2018-08-05
  • Contact: Hong Li E-mail:hli@iphy.ac.cn
  • Supported by:

    Project supported from the “Strategic Priority Research Program” of the Chinese Academy of Sciences (Grant No. XDA09010102).

摘要:

A series of Si/C composites were fabricated based on pitch and Si powders with particle sizes of 30, 100, 500, and 3000 nm. The size effects of the Si particles in the Si/C composites were investigated for lithium-ion battery anodes. The nanoscale Si and Si/C composites exhibited good capacity retentions. Scanning electron microscopy showed that exterior and interior cracks emerging owing to volume expansion as well as parasitic reactions with the electrolyte could well explain the performance failure.

关键词: silicon-carbon composite, solid-electrolyte interphase, size effect, anode, volume expansion

Abstract:

A series of Si/C composites were fabricated based on pitch and Si powders with particle sizes of 30, 100, 500, and 3000 nm. The size effects of the Si particles in the Si/C composites were investigated for lithium-ion battery anodes. The nanoscale Si and Si/C composites exhibited good capacity retentions. Scanning electron microscopy showed that exterior and interior cracks emerging owing to volume expansion as well as parasitic reactions with the electrolyte could well explain the performance failure.

Key words: silicon-carbon composite, solid-electrolyte interphase, size effect, anode, volume expansion

中图分类号:  (Lithium-ion batteries)

  • 82.47.Aa
65.40.gk (Electrochemical properties) 82.45.Fk (Electrodes) 62.23.Pq (Composites (nanosystems embedded in a larger structure))