摘要
综述了最近几年对于锂离子二次电池正极材料氧化锰锂的研究。研究的氧化锰锂材料主要有尖晶石结构的LiMn2 O4、Li4Mn5O9和Li4Mn5O12 以及层状结构的LiMnO2 。对于LiMn2 O4,通过引入适当的杂原子和采用新的溶胶 -凝胶法制备 ,可以有效地克服Jahn -Teller效应所造成的容量衰减现象。Li4Mn5O9和Li4Mn5O12 可以用低温方法合成 ,能作为 3V锂离子二次电池的理想正极材料 ,层状结构LiMnO2 的容量比目前常用的正极材料的质量容量均要高 ,可达 2 70mAh/g ,而且循环性能也比较理想。随电子技术的发展 ,以氧化锰锂为正极的锂离子二次电池将得到广泛的应用。
In this paper,the latest progress on lithium manganese oxide as cathode materials of lithium ion secondary battery was reviewed.The studied materials related to lithium manganese oxide include LiMn 2O 4,Li 4Mn 5O 9 and Li 4Mn 5O 12 with spinel structure and LiMnO 2 with layered structure.As to LiMn 2O 4,its capacity fading phenomena resulted from Jahn-Teller distortion has been overcome efficiently through introduction of suitable interatoms and by using a novel sol-gel preparation method.Li 4Mn 5O 9 and Li 4Mn 5O 12 synthesized by low temperature route can be ideal cathode materials for lithium ion secondary battery with average output voltage 3V.Weight capacity of LiMnO 2 with layered structure can be as high as 270mAh/g,which is higher than that of cathode materials used currently,and its cycle properties is quite satisfactory.With the development of electronics technologies,lithium ion secondary battery using lithium manganese oxide as cathode would be widely used.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2000年第1期18-22,共5页
Journal of Functional Materials
关键词
二次电池
氧化锰锂
锂离子电池
正极材料
lithium ion secondary battery
cathode
lithium manganese oxide
progress
