摘要
Jahn-Teller效应是LiMn2O4正极材料容量快速下降的重要原因之一,严重制约着其更广泛的商业应用。通过一种新的动态水热方法改性尖晶石LiMn2O4的表面,从而抑制其Jahn-Teller效应,提高电化学性能。通过对各种性能测试的分析,结果表明在LiMn2O4材料表面生成了LiNixMn-xO4固熔体,从而达到了抑制Jahn-Teller效应和提高循环性能的目的。
Jahn-Teller distortion was one of the most important reasons of capacity fade for spinel LiMn2O4 as cathode material, and its commercialization in lithium ion batteries was limited. The modified spinel LiMn2O4 via a novel dynamic hydrothermal process was prepared to suppress this distortion. Various instruments were used to investigate the structure and morphology of LiMn2O4. The results reveal that the shell of LiNixMn_n-xO4 solid solution is formed on the surface of LiMn2O4 particles, and the purpose of suppressing the Jahn-Teller distortion and further improving its cyclic performance are realized.
出处
《电源技术》
CAS
CSCD
北大核心
2015年第1期37-39,共3页
Chinese Journal of Power Sources
基金
上海工程技术大学研究生科研创新专项(13KY0401)
上海市教委物理学科建设项目(E10507140213)
