储能科学与技术 ›› 2016, Vol. 5 ›› Issue (4): 522-526.doi: 10.12028/j.issn.2095-4239.2016.04.017

• 研究及进展 • 上一篇    下一篇

SiO/C复合材料在锂离子电池中的应用

吴敏昌，沈  龙，乔永民，张  洁   

  1. 上海杉杉科技有限公司，上海 201209
  • 收稿日期:2015-11-13 修回日期:2015-11-20 出版日期:2016-07-01 发布日期:2016-07-01
  • 通讯作者: 吴敏昌（1978—），男，硕士，工程师，研究方向为锂离子电池负极材料应用，E-mail：wu.minchang@shanshantech.com。
  • 作者简介:吴敏昌（1978—），男，硕士，工程师，研究方向为锂离子电池负极材料应用，E-mail：wu.minchang@shanshantech.com。

Application of SiO/C composite anode material for lithium -ion batteries

WU Minchang, SHEN Long, QIAO Yongmin, ZHANG Jie   

  1. Shanghai Shanshan Tech. Co., LTD, Shanghai 201209, China
  • Received:2015-11-13 Revised:2015-11-20 Online:2016-07-01 Published:2016-07-01

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摘要： 硅基材料因其较高的比容量而受到研究者广泛的关注。本文选取高比容量SiOx与NG复合材料作为锂离子电池负极材料，研究了不同SiO/C复合比例对全电池的能量密度和循环性能的影响。不同比例SiOx/C复合材料的首次容量和首次效率有明显差别。与石墨材料相比，SiOx/C复合材料的膨胀程度略有增加。随着SiOx比例的增加，全电池的能量密度先是上升然后下降，但其循环稳定性却有所降低。当SiOx比例在4%时，全电池能量密度提升1.2%，500周循环后容量保持率在80%以上，可以满足商业化锂离子电池的使用要求。

关键词: SiO/C复合材料, 负极材料, 循环性能, 锂离子电池

Abstract:

Silicon-based anode materials have attracted a lot of interests due to their high specific capacities. In this paper, the SiOx & NG composite was measured as a high-capacity anode for lithium-ion batteries, and the effect of the SiO/C proportion on the energy density and cycle performance of full cell was investigated. The full cells with SiO/C composite in various proportions show different initial capacities and columbic efficiencies. Compared with natural graphite, SiO/C composites display a larger expansion. Moreover, the energy-density of full cell show an enhancement in a low SiO content but a gradual reduce with further increase of SiOx content, and the corresponding cycle performance of full cell decrease with the increasement of SiOx. When the proportion of SiOx is 4%, the energy density of full cell adds 1.2%, and the capacity retains over 80% after 500 cycles, which can satisfy the demands of commercial lithium ion batteries.

Key words: SiO/C composite, anode materials, cycling performance, lithium ion batteries