湿法球磨制备LiCo_(1/3)Mn_(1/3)Ni_(1/3)O_2材料及表征  

Preparation of LiCo_(1/3)Mn_(1/3)Ni_(1/3)O_2 cathode material by sucrose combustion method

作　　者：谭江[1] 苏玉长[1] 方慧惠[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《电源技术》2009年第11期966-969,共4页Chinese Journal of Power Sources

基　　金：教育部高等学校骨干教师基金资助项目(2000)

摘　　要：以六水合硝酸镍、硝酸钴和二氧化锰为原料,以柠檬酸为分散剂和燃料,采用球磨工艺对原料进行混合,在950℃于空气气氛中保温10h制备了层状结构的LiCo1/3Mn1/3Ni1/3O2正极材料。通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)和电化学性能测试手段对所制备材料的结构、形貌及电化学性能进行表征。结果表明:所合成的材料为单相的六方层状结构,颗粒大小均匀。在2.75～4.3V电压区间,以0.1C恒电流充放电,首次充/放电比容量为184.3/156.7mAh/g,充/放电效率为85%。0.5C倍率下充放电,材料首次放电比容量为151.3mAh/g,经过30次循环后比容量保持在150.8mAh/g左右,循环性能优异。The layered LiCo1/3 Mn1/3Ni1/3O2 cathode materials with hexagonal structure were successfully synthesized by combustion method followed with sintering 950℃ for 10 h in air. The samples were characterized by XRD, SEM and electrochemical test. The results show that the uniform crystallites of LiCo1/3 Mn1/3Ni1/3O2 are obtained. The initial charge and discharge capacities are 184.3/156.7 mAh/g at 0.1 C between 2.75 V and 4.3 V. The initial discharge capacity is 151.3 mAh/g at 0.5 C. After 30 cycles, the discharge capacity is 150.8 mAh/g, which shows good cycling stability.

关 键 词：锂离子电池 LiCo1/3Mn1/3Ni1/3O2 燃烧方法 

分 类 号：TM912.9[电气工程—电力电子与电力传动]