Rate Capability Fade of 18650 Li-ion Cells

摘要：

　　The rate capability of 18650 lithium-ion cells was studied in the paper.The experimental results showed that the reversible capacity declined to 89.5,85.8 and 81.2% of the initial capacity after 300 cycles at discharge rate of 0.5,1 and 2C,respectively.The XRD and SAED analysis indicated that at a high current density partial positive electrode material LiCoO2 transformed gradually from well-layered structure to rock salt cubic crystal.Upon the cycling,the degradation of cathode materials structure and much thicker negative film on anode electrode surface contributed to the rate capability fade.

关键词： Rate capability fade 18650 Li-ion ceils Electrode Structure transformation

作者: Fang Lian Yan Li Yang Hu Shengwen Zhong Lihua Xu Qingguo Liu

作者单位: Department of Material Science and Engineering,University of Science and Technology Beijing,Beijing 100083,P.R.C

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 290-292

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）