Electrochemical Properties of LiFePO4/C Composite Improved by High Energy Milling

摘要：

The electrochemical properties of LiFePO4 as a cathode of lithium ion batteries considerably depend on a particle size of LiFePO4 and a condition of carbon coating. In this study,LiFePO4 powders were prepared using ultrasonic spray pyrolysis method, and then LiFePO4/C composites were made by infiltrating sucrose solution into LiFePO4 powders, drying, high-energy milling and annealing. The effects of high-energy milling were analyzed by comparing with electrochemical properties of powders synthesized without high-energy milling. It was found that the milling process drastically reduced the particle size of synthesized powders and electrical conductivity, and improved discharge capacity, cycle stability and rate performance.

关键词： Lithium ion battery Cathode, LiFePO4 Carbon coating Electrical conductivity High Energy Milling

作者: Chang-Sam Kim Sung Ik Hwang Shinwoo Kim

作者单位: Korea Institute of Science & Technology, P.O.Box 131, Seou1130-650, Korea Hoseo University, 165 SechuI-Ri, Baebang, Asan Chungnam 336-795, Korea

会议类型: 国际会议

会议名称: 10th International Symposium on Eco-Materials Processing and Design(第10届国际生态材料加工与设计研讨会)

会议地点: 西安

会议语种:英文

页码: 41-44

在线出版日期: 2009-01-13（万方平台首次上网日期，不代表论文的发表时间）