低共熔混合锂盐合成LiNi_(0.8)Co_(0.2)O_2的研究  

Preparation of LiNi_(0.8)Co_(0.2)O_(2)using eutectic mixed lithium salt

作　　者：常照荣[1] 齐霞[2] 吴锋[1] 汤宏伟[2] 孙东[2] 

机构地区：[1]北京理工大学化工与环境学院,北京100080 [2]河南师范大学化学与环境科学学院,河南新乡453007

出　　处：《应用化工》2005年第9期535-538,共4页Applied Chemical Industry

基　　金：国家自然科学基金资助项目(90206043)

摘　　要：在空气气氛中,采用低共熔混合物LiNO3-LiOH为锂盐,制备出了锂离子电池正极材料LiNi0.8Co0.2O2.XRD分析表明:此工艺制得的正极材料具有完整的层状结构.电性能测试表明:在0.5 mA/cm2的充放电电流密度和2.7～4.2 V的电压范围内,LiNi0.8Co0.2O2首次放电比容量为145.2 mA·h/g,充放电库仑效率为83.8%;循环20次后,放电比容量为124.8 mA·h/g.该方法能制备出电化学性能良好的LiNi0.8Co0.2O2正极材料.In air atmosphere, using eutectic mixture of LiNO3-LiOH as lithium salt to prepare cathode materials LiNi0.8Co0.2O2 for lithium ion battery. XRD results showed the prepared cathode materials had perfect layer structure. Electrochemical property tests testified that for charge-discharge current density of 0.5mA/cm^2 and voltage of 2.7 V and 4.2 V, the initial discharge specific capacity of prepared LiNi0.8Co0.2O2 was 145.2 mA·h/g and the coulomb efficiency was 83.8%. The discharge specific capacity remains 124.8 mA. h/g after the 20th cycles, indicating cathode material LiNi0.8Co0.2O2 with good electrochemical property can be prepared by this technology.

关 键 词：锂离子电池 熔融盐 正极材料 

分 类 号：TM912.2[电气工程—电力电子与电力传动]