共沉淀法制备锂离子电池正极材料LiFePO_4  

Preparation of cathode material of LiFePO_4 for lithium-ion battery by co-precipitation method

作　　者：钟参云[1] 田彦文[1] 曲涛[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《材料与冶金学报》2005年第4期272-274,285,共4页Journal of Materials and Metallurgy

基　　金：辽宁省科技厅公关项目(2003224005)

摘　　要：采用共沉淀法制备橄榄石结构的L iFePO4锂离子电池正极材料,通过X射线衍射(XRD)、透射电镜(TEM)、循环伏安(CV)和恒电流充放电测试等方法对其结构、表观形貌及电化学性能进行了分析研究.结果表明,该方法制备的L iFePO4为均一的橄榄石型晶体结构,颗粒微细;低倍率下充放电测试比容量可达126.3 mA.h/g;循环性能良好,充放电100次循环后,容量损失率仅为9.4%.Cathode material of olivine LiFePO4 for lithium-ion battery was prepared by co-precipitation method. The structure, morphology of particles and electrochemical performance of the samples were investigated by X-ray diffraction, transmission electron microscope, cyclic vohammetry and constant current charge-discharge test. The results show that LiFePO4 prepared by this method are fine powders with single olivine phase; the specific discharge capacity is 126. 3 mAh/g at a low discharging rate; the circulation performance is good with only 9.4% capacity fading after 100 discharge - charge circles..

关 键 词：锂离子电池 LIFEPO4 共沉淀法 

分 类 号：TM912.9[电气工程—电力电子与电力传动]