自聚物裂解工艺制备5V正极材料LiNi0.5Mn1.5O4  

Preparation of LiNi0.5Mn1.5O4 cathode material for 5 V lithium ion battery by autopolymer pyrolysis process

作　　者：黄振德 彭迪 HUANG Zhen-de;PENG Di(Department of Petroleum and Chemical Engineering,Guangxi Industrial Vocational and Technical College,Nanning Guangxi 530001,China)

机构地区：[1]广西工业职业技术学院石油与化学工程系,广西南宁530001

出　　处：《电源技术》2020年第3期312-314,共3页Chinese Journal of Power Sources

基　　金：广西教育厅科研立项项目(200708LX315)。

摘　　要：采用溶胶凝胶法的新型自聚物裂解工艺合成5 V锂离子电池LiNi0.5Mn1.5O4正极材料,经XRD、SEM和充放电循环测试,合成材料具有尖晶石结构,粒径大小分布均匀,在0.2 C充放电下首次放电比容量达到141 mAh/g,循环100次容量保持率为93%,与其它溶胶凝胶法的柠檬酸乙二醇工艺和高分子PAA工艺合成材料相比,电化学性能良好。The LiNi0.5Mn1.5O4 cathode material of 5 V lithium ion battery was synthesized by new autopolymer pyrolysis process from sol-gel method.The material is analyzed by X-ray diffraction(XRD),scanning electron microscope(SEM) and charge-discharge cycle.It is characterized that as-synthesized material has a spinel structure with narrow particle size distribution.The initial discharge specific capacity reaches 141 mAh/g under 0.2 C charge-discharge conditions.After 100 times of charge-discharge cycles,the capacity retention rate keep 93%.Compared with other sol-gel process-citric acid glycol process and polymer PAA process,the electrochemical performance is good.

关 键 词：尖晶石LiNi0.5Mn1.5O4 溶胶凝胶法 自聚物裂解工艺 

分 类 号：TM912[电气工程—电力电子与电力传动]