液相法合成锂离子电池正极材料Li_(1+x)Mn_2O_4  

Synthesis of Li_(1+x)Mn_2O_4 cathode material for lithium-ion batteries with solution method

作　　者：刘培松[1] 刘兴泉[1] 李庆[1] 陈召勇[1] 张伯兰[1] 于作龙[1] 

机构地区：[1]中国科学院成都有机化学研究所功能材料研究开发中心,四川成都610041

出　　处：《电化学》2000年第3期363-368,共6页Journal of Electrochemistry

基　　金：国家科委和四川省科委资助! (98 D 1 0 2 )项目

摘　　要：采用柠檬酸络合和溶液浸渍两种方法制备Li1+xMn2 O4正极材料 ,用XRD和BET测试了材料晶体结构和比表面积 ,考察焙烧温度、Li/Mn比、起始原料对产物结构和电化学性能的影响 ,结果表明 ,焙烧温度与Li/Mn比是影响材料电化学性能的关键因素 ,确定了制备Li1+xMn2 O4材料最佳条件为 0≤x≤ 0 .0 5 ,焙烧温度 75 0°C ,所得电池材料首次充放电容量达到 1 2 0mAh/g .循环 5 0次后 ,其充放电容量为 1 1 5mAh/g .The cathode materials Li 1+x Mn 2O 4 were prepared with citric acid complexing and solution impregnating methods.Structure characterization and specific surface area test were performed by means of XRD,BET methods ,the influences of calcination temperature,Li/Mn molar ratio and raw materials on the structure and electrochemical capacity of samples have beem examined.The results showed that the Li/Mn molar ratio and calcimation temperature were the key factors affecting the electrochemical capacity of cathode materias.The optimum conditions for synthesis of Li 1+x Mn 2O 4 cathode material were 0≤x≤0.05 and calcined at 750°C.The initial capacity of the sample reached 120 mAh/g and capacity retention after 50 cycles was 115 mAh/g.

关 键 词：锂离子电池 锂锰氧化物 正极材料 液相法合成 

分 类 号：TM911[电气工程—电力电子与电力传动]