前驱体磷酸铁的制备及其对磷酸铁锂电化学性能的影响  

Preparation of precursor FePO_4 and its effects on electrochemical properties of LiFePO_4

作　　者：刘贡钢[1] 叶红齐[1] 刘辉[1] 谢东丽[1] 董虹[1] 

机构地区：[1]中南大学化学化工学院,湖南长沙410083

出　　处：《应用化工》2013年第2期225-228,共4页Applied Chemical Industry

基　　金：国家自然科学基金项目(21276284);湖南省自然科学基金项目(11JJ3025)

摘　　要：以Fe3+为铁源,采用均相沉淀法制备前驱体磷酸铁,通过碳热还原法制得磷酸铁锂正极材料,研究其电化学性能。结果表明,以优化条件下所得磷酸铁为前驱体制备的磷酸铁锂,在0.1 C充放电倍率下,其首轮放电比容量达154 mA.h/g,充电比容量为156 mA.h/g,首轮充放电效率达98.9%,循环倍率性能优良。Precursor FePQ was prepared via homogeneous precipitation with Fe3＊ as iron source, then LiFePO4 was synthesized by carbon-thermal reduction method using obtained FePQ as precursor,its elec- trochemical performance was studied. The results demonstrated that, when precursor was prepared by hom- ogeneous at optimal conditions, the first discharge and charge capacity of obtained LiFePO4 can be up to 154 mA· h/g and 156 mA · h/g at O. 1 C charge-discharge rate,the efficiency of first eharge-discharge reached 98.9% ,the material exhibited excellent circulating ratio performance.

关 键 词：磷酸铁锂 均相沉淀法 磷酸铁 电化学性能 

分 类 号：TQ152[化学工程—电化学工业] TM912.9[电气工程—电力电子与电力传动]