尖晶石LiMn2O4正极材料的研究进展  

Research progress in spinel LiMn2O4 cathode material

作　　者：陈锐芳 撒召遥 苏长伟[1,2] 郭俊明[1,2] CHEN Rui-fang;SA Zhao-yao;SU Chang-wei;GUO Jun-ming(Key Laboratory of Comprehensive Utilization of Mineral Resources in Ethnic Regions,Yunnan Minzu University,Kunming,Yunnan 650500,China;Key Laboratory of Resource Clean Conversion in Ethnic Regions,Education Department of Yunnan,Yunnan Minzu University,Kunming,Yunnan 650500,China)

机构地区：[1]云南民族大学云南省高校绿色化学材料重点实验室,云南昆明650500 [2]云南民族大学生物材料绿色制备技术国家与地方联合工程研究中心,云南昆明650500

出　　处：《电池》2020年第5期496-500,共5页Battery Bimonthly

基　　金：国家自然科学基金(51561032,51972282,51462036,U1602273)。

摘　　要：分析尖晶石锰酸锂(LiMn2O4)正极材料的结构和充放电机理,并对常见的制备方法,如高温固相法、溶胶-凝胶法、共沉淀法、熔盐燃烧法、水热合成法和液相无焰燃烧法等进行介绍。分析尖晶石LiMn2O4的容量衰减机理,指出在循环过程中,发生的Jahn-Teller效应、锰溶解歧化反应、氧缺陷和有机电解液分解等现象是制约商品化应用的瓶颈。对尖晶石LiMn2O4的改性策略进行总结归纳,元素掺杂、表面包覆、显微结构控制和合成工艺的优化,可提高整体循环性能。The structure and charge-discharge mechanism of spinel lithium manganate(LiMn2O4)cathode materials were analyzed,the normal preparation methods,such as high temperature solid state method,sol-gel method,coprecipitation method,molten salt combustion method,hydrothermal synthesis method and liquid phase flameless combustion method were described.The capacity decay mechanism on spinel LiMn 2O 4 was analyzed,it was pointed out that the Jahn-Teller effect,manganese dissolution disproportionation reaction,oxygen defects and decomposition of organic electrolyte during cycling were the bottlenecks restricting its commercial application.The modification strategies on spinel LiMn 2O 4 was summarized,element doping,surface coating,microstructure control and synthesis process optimization were considered as effective strategies to improve the overall cycle performance.

关 键 词：锂离子电池 正极材料 尖晶石锰酸锂(LiMn2O4) 制备 

分 类 号：TM912.9[电气工程—电力电子与电力传动]