锂离子电池正极材料LiFePO_4/C的合成及性能  

Synthesis and performance of Li-ion battery cathode material LiFePO_4/C

作　　者：张勇[1] 杜培培[1] 王力臻[1] 张爱勤[1] 冯辉[1] 张小平[2] 

机构地区：[1]郑州轻工业学院河南省表界面科学重点实验室,郑州450002 [2]许昌学院文旅学院,许昌461000

出　　处：《化工新型材料》2011年第2期66-68,共3页New Chemical Materials

基　　金：国家自然科学基金资助项目(21001097);河南省科技厅基础与前沿技术研究项目(102300410107);河南省高等学校青年骨干教师资助计划项目(豫教高[2009]844号);郑州市科技攻关项目(0910SGYG23259);郑州市金水区科技攻关项目(金科字[2009]35号(35))

摘　　要：用溶胶-凝胶法和微波法相结合制备了碳包裹的LiFePO4／C材料。XRD、SEM和电化学测试表明：真空干燥下微波18min所得样品为橄榄石型非晶结构，粒径在30-lOOnm，0．2C充放电的首次放电比容量为120mAh／g，第16次循环的比容量为113mAh／g。Carbon coated LiFePO4 cathode materials was prepared by sol-gel method with microwave process. The results of XRD, SEM and electrochemical tests showed that the optimal condition were： dried in vacuum and microwave time 18 min, on this condition, the sample had a olivine-type amorphous structure and grain size was in the range from 30 nm to 100 nm, when charge-discharge at 0.2 C, its initial specific discharge capacity was 120 mAh/g, the specific capacity at the 16^th cycle was 113 mAh/g.

关 键 词：LIFEPO4 锂离子电池 正极材料 碳包裹 

分 类 号：TM912[电气工程—电力电子与电力传动]