球磨对LiVPO_4F的合成及性能的影响  

Effects of ball milling on the synthesis and performance of LiVPO_4F

作　　者：钟胜奎[1] 尹周澜[1] 王志兴[2] 郭华军[2] 李新海[2] 

机构地区：[1]中南大学化学化工学院,湖南长沙410083 [2]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《电池》2006年第6期449-450,共2页Battery Bimonthly

基　　金：国家自然科学基金资助项目(50302016)

摘　　要：通过碳热还原法合成了正极材料LiVPO4F,利用XRD、SEM和充放电测试研究了球磨对LiVPO4F的合成和电化学性能的影响,结果表明:没有球磨的样品不能合成单相的LiVPO4F;球磨1 h和2 h合成的LiVPO4F样品的首次放电比容量分别为117 mAh/g和130 mAh/g,库仑效率分别为84.8%和87.2%,50次循环后,容量衰减率分别为16.2%和14.6%。The cathode material LiVPO4F was prepared by carbon-thermal reduction method. The effects of ball milling on the synthesis and electrochemical performance of LiVPO4F were studied by XRD, SEM and charge-discharge tests. The results showed that the single phase LiVPO4F could not be prepared without ball milling. The initial discharge specific capacity of LiVPO4F samples with the ball milling of 1 h and 2 h was 117 mAh/g and 130 mAh/g, the coulomb efficiency was 84.8% and 87.2%, the capacity fading rate was 16.2% and 14.6% after 50 cycles, respectively.

关 键 词：锂离子电池 正极材料 LIVPO4F 碳热还原法 

分 类 号：TM912[电气工程—电力电子与电力传动]