摘要
锂离子电池三元正极材料镍钴锰酸锂因为具有放电容量高、生产成本低、层状结构稳定、热稳定性好等优点,被认为是当前最可能广泛应用的动力电池正极材料。但还存在容量保持率低、不可逆相变大、循环性能差、高温热稳定性能差等问题,表面包覆工艺被认为是一种简便有效地提高材料多项性能的方法。综述了三元正极材料镍钴锰酸锂表面包覆的方法、常用包覆物质,分析了包覆后材料性能提高的原因,并提出了包覆工艺的改善对策。
Due to its high discharge capacity, low production cost, stable layered structure and good thermal stability. The NCM cathode material for lithium-ion batteries is considered as the most widely applicable cathode e-lectrode material for power cells at present. However* there are problems such as low capacity retention rate* large irreversible phase transition? poor cycling performance* poor high temperature thermal stability. Surface coating process is considered as a simple and effective way to improve the properties of materials. In this paper* the surface coating of the NCM cathode materials and the common coating material were reviewed* the reasons for the improved properties of the coated materials are also discussed* and the improvement measures of coating was proposed.
作者
肖利
陈浩
夏志美
刘鹏程
陈晗
XIAO Li，CHEN Hao，XIA Zhimei，LIU Pengcheng,CHEN Han(School of Metallurgical. Material Engineering, Hunan University of Technology, Zhuzhou 412007, China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2018年第6期15-22,共8页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51774127)
关键词
锂离子电池
正极材料
镍钴锰酸锂
电化学性能
包覆工艺
lithium-ion battery； cathode material； NCM； electrochemical performance； coating pnnress
