掺碳制备锂离子电池正极材料LiFePO_4  

Preparation on cathode materials of LiFePO_4 doping carbon for lithium-ion battery

作　　者：曲涛[1] 田彦文[1] 钟参云[1] 丁扬[1] 翟玉春[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《分子科学学报》2005年第4期37-41,共5页Journal of Molecular Science

基　　金：辽宁省自然科学基金资助项目(9810300702)

摘　　要：采用固相法合成LiFePO4和掺碳的LiFePO4,并对不同掺碳量的 LiFePO4进行电化学性能测试,室温条件下,在0．1 C倍率下充放电,样品d (ωc=8．5％)的初始放电容量为151．7 mA·h／g．10次循环后,其放电比容量仍 有149．5 mA·h／g,容量损失较小．这表明,在合适的制备工艺条件下,掺碳能获 得结构稳定、电化学性能良好的锂离子电池正极材料LiFePO4．LiFePO4 and LiFePO4 doping carbon were prepared by solid-state reaction.Sample d（ωC=8.5%）had good electrochemical performance whose initial capacity was 151.7 mA·h/g. It retained specific capacity 149.5 mA·h/g after 10 circles and had small capacity fading at room temperature. It showed that LiFePO4 with steady structure and good electrochemical performance could be obtained in appropriate conditions.

关 键 词：锂离子电池 正极材料 LIFEPO4 掺碳 固相法 

分 类 号：O646[理学—物理化学]