镍钴锰酸锂三元正极材料的改性研究进展
Research Progress on the Modification of Lithium Nickel-cobalt-Manganate Ternary Cathode Materials
李安瑞 1王春梅 2王一飞 1张若楠 1宋振浩 1苏丹1
作者信息
- 1. 华北理工大学材料科学与工程学院,唐山0632102
- 2. 华北理工大学材料科学与工程学院,唐山0632102;河北省无机非金属材料重点实验室,唐山0632103;河北省工业固废综合利用技术创新中心,唐山 063210
- 折叠
摘要
锂离子电池的容量、循环寿命和安全性等性能很大程度上依赖于正极材料.镍钴锰酸锂(NCM)三元正极材料具有能量密度高、成本低、相对安全等优点而备受关注.但阳离子混排、界面副反应、不可逆相变等问题的存在严重影响了电池的循环和倍率等性能.综述了 NCM正极材料的结构特点、问题成因,并从掺杂、表面包覆、单晶和浓度梯度结构等角度探讨了其改性研究情况,对其未来研究方向进行了展望.
Abstract
Cathode materials determine the specific capacity,cycle life and safety of lithium-ion battery to a large extent.Lithium nickel-cobalt-manganate(NCM)ternary cathode materials have attracted more attention due to their high energy density,low cost and relative safety.However,the issues such as cation mixing,interfacial side reactions and irreversible phase transition severely impact the battery's cycling and rate performance.In this paper,the structural characteristics and the problem genesis of NCM cathode materials were reviewed.Furthermore,the modification research progresses of doping,surface coating,single crystal and concentration gradient structure of the materials were discussed.Further research directions were also anticipated.
关键词
锂离子电池/三元正极材料/镍钴锰酸锂/掺杂和包覆/结构设计Key words
Lithium-ion batteries/Ternary cathode material/Lithium nickel-cobalt-manganate/Doping and coating/Structural design引用本文复制引用
出版年
2024
NETL
NSTL
万方数据