欢迎访问《电化学(中英文)》期刊官方网站,今天是

电化学(中英文) ›› 2014, Vol. 20 ›› Issue (1): 51-55.  doi: 10.13208/j.electrochem.130227

• 研究论文 • 上一篇    下一篇

等离子体辅助球磨Si-C复合负极材料及其电化学性能研究

陈宇龙,胡仁宗,刘辉,孙威,朱敏*   

  1. 华南理工大学 材料科学与工程学院,先进储能材料广东省重点实验室,广东 广州 510641
  • 收稿日期:2013-02-27 修回日期:2013-07-01 出版日期:2014-02-25 发布日期:2014-02-24
  • 通讯作者: 朱敏 E-mail:memzhu@scut.edu.cn
  • 基金资助:

    国家自然科学基金项目(No. 51201065, No. 51231003)、中央高校基本科研业务费专项资金(No. 2012ZM0001)和广东省自然科学基金博士科研启动项目(No. S2012040008050)资助

Electrochemical Performance of Si-C Composites Prepared by Discharge-Plasma Assisted Milling

CHEN Yu-long, HU Ren-zong, LIU Hui, SUN Wei, ZHU Min*   

  1. School of Materials Science and Engineering, South China University of Technology,Guangdong Key Lab of Advanced Materials for Energy Storage, Guangzhou 510640, China
  • Received:2013-02-27 Revised:2013-07-01 Published:2014-02-25 Online:2014-02-24
  • Contact: ZHU Min E-mail:memzhu@scut.edu.cn

摘要: 首次采用介质阻挡放电等离子体辅助高能两次球磨制得Si-C复合材料,其结构为微纳尺度硅颗粒均匀分散于微米级碳基体上. Si-C复合电极首周期循环放电容量为1259 mAh·g-1,20和100周期循环的容量分别为474和396 mAh·g-1. 该电极充放电曲线和交流阻抗测试的结果表明,复合材料中的硅和碳均参与锂离子嵌/脱反应,且其电荷传导阻抗明显低于纯Si.

关键词: 锂离子电池, 负极, 硅碳复合物, 放电等离子体, 高能球磨

Abstract: Silicon-carbon (Si-C) composites, with microstructure of multi-scaled Si particles being homogenously dispersed in micro-sized carbon matrix, had been prepared by dielectric barrier discharge plasma assisted two-step milling for the first time. The Si-C composite anode had a discharge capacity of 1259 mAh·g-1 at the first cycle, while the capacity retained 474 and 396 mAh·g-1 after 20 and 100 cycles, respectively. Charge-discharge curves and AC impedance response indicated that both silicon and carbon phases in the composite anode were involved during the lithiation/delithiation reactions and the electron transport resistance in the Si-C composite anode was much lower than that in the pure Si anode.

Key words: lithium-ion batteries, anode, Si-C composites, discharge plasma, ball milling

中图分类号: