锰酸锂表面改性提高循环性能的研究进展  

Review of the Research of the Surface Modification of Lithium Manganese Oxide to Improve the Cycle Performance

作　　者：张靖[1] 孙新艳[1] 何岗[1] 洪建和[1] 何明中[1] 

机构地区：[1]中国地质大学(武汉)材料科学与化学工程学院,武汉430074

出　　处：《材料导报》2012年第13期20-25,61,共7页Materials Reports

基　　金：国家自然科学基金(50821140308;50972135);材料复合新技术国家重点实验室(武汉理工大学)开放基金(2010-KF-6)

摘　　要：尖晶石型LiMn2O4正极材料目前还存在初始容量较低、容量衰减快、高温性能差等问题。表面改性是一种常用的改性方法,它能有效地改善锰酸锂的性能。主要介绍了金属氧化物、含Li化合物、聚合物、金属、氟化物、氧化物玻璃以及一些含氧盐对锰酸锂的表面改性及对其循环性能影响的研究进展,概括了锰酸锂不同表面改性方法的优缺点,并提出了可行的改进方案。Spinel I.iMn2O4 cathode material has the shortage such as lower initial capacity, fast capacity fading and poor performance at elevated temperature at present. Surface modification is a common modification method, it can effectively improve the performance of lithium manganese oxide. The research of the impacts on the cycle perfor- mance of surface modification of lithium manganese oxide by metal oxides, Li-containing compounds, polymers, me tals, fluorides, amorphous oxides and some oxygenated salts is reviewed. And the advantages and disadvantages of different methods of surface modification of lithium manganese oxide are summarized, also some feasible methods to improve the performance of lithium manganese oxide are proposed.

关 键 词：锂离子电池正极材料LiMn2O4 表面改性高温性能 

分 类 号：TB383[一般工业技术—材料科学与工程]