摘要
为了解决尖晶石锰酸锂(LiMn2O4)电池正极在高温下容量降低过快的问题,通过简单方法将NiO包覆到LiMn2O4粉体表面,并对包覆前后LiMn2O4粉体材料的结构、形貌和相应正极材料的电化学性能进行了研究。结果表明:NiO包覆LiMn2O4粉体后其晶体结构没有发生改变,表面呈现钟乳石状突起;与包覆前相比,NiO包覆LiMn2O4粉体后的正极材料的循环性能和倍率性能分别提高了8.79%和14.04%。
In order to solve the problem of severe capacity fading for the anode of spinel LiMn2O4 battery at high temperature,NiO was coated on LiMn2O4 powders surface by a simple method,and the structure,morphology of the LiMn2O4 without and with coating and the electrochemical performance of the anode material were studied.The results show that,the structure of the LiMn2O4 particles with NiO coating had no changes,and its surface exhibided stalactite-like protrusions.Compared with the LiMn2O4 anode material without NiO coating,the cycling ability and rate capability of the anode material with NiO coating increased by 8.79% and 14.04%.
出处
《机械工程材料》
CAS
CSCD
北大核心
2015年第3期59-64,共6页
Materials For Mechanical Engineering
