锂离子电池正极材料LiFePO_4的合成及其改性  

Modification Study on LiFePO4Used as Cathode Materials for Lithium-ion Batteries

作　　者：徐娜[1] 黄舒烨[1] 林滨梅[1] 张俊喜[1] 吴一平[1] 张万友[2] 

机构地区：[1]上海电力学院电化学研究室国家电力公司热力设备腐蚀与防护重点实验室,上海200090 [2]东北电力大学应用化学系,吉林吉林132012

出　　处：《上海电力学院学报》2006年第3期269-272,共4页Journal of Shanghai University of Electric Power

基　　金：教育部科技研究项目(205055);中国航天科工集团支撑技术基金(DLO1-2004);上海市重点学科建设基金(P1304)

摘　　要：采用共沉淀法合成了锂离子正极材料LiFePO4,考察了不同合成条件对材料结构及性能的影响.研究结果表明:通过碳包覆改性后,LiFePO4的容量可明显提高,SiO2的掺杂对LiFePO4的结构没有影响.同时讨论了上述两种改性方法对材料性能的影响机制.A series of LiFePO4 materials are synthesized by co-precipitation method. The structural and electrochemical performances of materials under different synthesis conditions are examined. Modified LiFePO4/C composites are synthesized by coating and doping, and examined by the such methods as XRD, SEM and constant current charge/discharge. The effects of modification are anatomized both qualitatively and quantitatively.

关 键 词：锂离子电池 橄榄石型LiFePO4 正极材料 改性 

分 类 号：TQ131.1[化学工程—无机化工] O646.21[理学—物理化学]