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LiMn₂O₄的容量衰减机理和结构稳定方法

Mechanisms of capacity fading and methods to stabilize structure of spinel LiMn₂O₄

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【Author】 LǚDong sheng1, LI Wei shan1, LIU Xu2,QIU Shi zhou2 (1. Department of Chemistry , South China Normal University, Guangzhou Guangdong 510631,China; 2.Guangzhou Battery Factory, Guangzhou Guangdong 510253,China)

【机构】华南师范大学化学系；广州电池厂；广州电池厂广州510631；广州510631；广州510253；广州510253；

【摘要】综述了近年来在尖晶石锂锰氧化物的容量衰减机理和结构稳定性方面的研究进展。研究表明电解液的分解、John-Teller效应、Mn在电解液中的溶出是LiMn2O4容量衰减的主要原因。介绍了提高尖晶石LiMn2O4结构稳定性的方法,其中最有效的方法是在LiMn2O4中掺入Co、Cr、Ni、Cu、Al、F等元素和在LiMn2O4表面包覆LiCoO2,B2O3,Al2O3,SiO2等。更多还原

【Abstract】 The recent development of investigations on the mechanisms of capacity fade and the methods to stabilize structure of spinel LiMn2O4 was introduced. Capacity fade of spinel LiMn2O4 was mainly attributed to electrolyte decomposition, John-Teller distortion and Mn dissolution. To improve cyclic stability of spinel LiMn2O4, many methods have been proposed. The most effective ones were doping with Co、Cr、Ni、Cu、Al、F,etc, and coating with LiCoO2,B2O3,Al2O3,SiO2, etc.更多还原