物理化学学报 >> 2014, Vol. 30 >> Issue (2): 305-310.doi: 10.3866/PKU.WHXB201312022

电化学和新能源 上一篇    下一篇

Si-O-C骨架支撑型高循环性能锂离子电池硅基负极材料

王建涛, 王耀, 黄斌, 杨娟玉, 谭翱, 卢世刚   

  1. 北京有色金属研究总院动力电池研究中心, 北京100088
  • 收稿日期:2013-10-24 修回日期:2013-12-02 发布日期:2014-01-23
  • 通讯作者: 卢世刚 E-mail:slu@grinm.com
  • 基金资助:

    国家高技术研究发展计划(863) (2011AA11A256,2013AA050903,2013AA050906)资助项目

Silicon Supported on Stable Si-O-C Skeleton in High-Performance Lithium-Ion Battery Anode Materials

WANG Jian-Tao, WANG Yao, HUANG Bin, YANG Juan-Yu, TAN Ao, LU Shi-Gang   

  1. R&D Center for Vehicle Battery and Energy Storage, General Research Institute for Nonferrous Metals, Beijing 100088, P. R. China
  • Received:2013-10-24 Revised:2013-12-02 Published:2014-01-23
  • Contact: LU Shi-Gang E-mail:slu@grinm.com
  • Supported by:

    The project was supported by the National High Technology Research and Development Program of China (863) (2011AA11A256, 2013AA050903, 2013AA050906).

摘要:

通过经济有效的方法制备得到一种具有长循环寿命的高效稳定性硅/硅氧碳/无定形碳的复合负极材料结构. 在这种结构中,以具有稳定化学性能的硅氧碳结构作为骨架,来支撑和隔离硅纳米颗粒结构. 材料中包含的无定形碳组分可提高硅/硅氧碳结构的电导性能. 这种复合负极结构在0.3C电流充放电情况下,不仅能发挥出637.3 mAh·g-1的比容量,而且在经过100 周的充放电循环后,其容量保持率也达到86%. 这种新型硅基负极材料的设计为其他功能材料的设计提供了一种潜在可能的方法.

关键词: 硅/硅氧碳/碳, 复合材料, 锂离子电池, 负极, 长循环寿命

Abstract:

A Si/SiOC/graphite composite structure with high efficiency and long-term cycling stability was synthesized using a cost- effective method. In this structure, a SiOC network with good chemical stability acts as a skeleton to support and segregate Si nanostructures. The graphite incorporated in the Si/SiOC composite is used as a conductive material to enhance the electrical conductivity. Such Si/SiOC/graphite composite anodes show excellent cycling stability, with a specific capacity of ~637.3 mAh·g-1 and ~86% capacity retention over 100 cycles at a rate of 0.3C. The design of this new structure has the potential to provide a basis for the development of other functional composite materials.

Key words: Si/SiOC/graphite, Composite material, Lithium-ion battery, Anode, Long-term cycling

MSC2000: 

  • O646