化工学报 ›› 2024, Vol. 75 ›› Issue (11): 4020-4036.DOI: 10.11949/0438-1157.20240740
胡成志(), 王国贤, 唐伟建, 李阿飞, 陈章贤, 杨则恒, 张卫新(
)
收稿日期:
2024-07-01
修回日期:
2024-09-11
出版日期:
2024-11-25
发布日期:
2024-12-26
通讯作者:
张卫新
作者简介:
胡成志(1999—),男,博士研究生,hcz199903@163.com
基金资助:
Chengzhi HU(), Guoxian WANG, Weijian TANG, Afei LI, Zhangxian CHEN, Zeheng YANG, Weixin ZHANG(
)
Received:
2024-07-01
Revised:
2024-09-11
Online:
2024-11-25
Published:
2024-12-26
Contact:
Weixin ZHANG
摘要:
层状镍钴锰酸锂(LiNi1-x-y Co x Mn y O2,0<x+y<1)因具有能量密度高和成本低等优点,是备受关注的动力锂离子电池正极材料之一。然而,该材料在充放电循环过程中因锂离子脱出和晶格氧逸散引起的不可逆相变、过渡金属离子溶出等因素导致容量衰减、结构损坏和安全隐患,严重制约了其在电动汽车上的应用。表面包覆改性技术通过增加正极材料与电解质之间的界面稳定性、抑制微裂纹产生以及提高电池的热稳定性,能够有效提升正极材料的循环稳定性和安全性能。本文在分析高镍三元正极材料界面降解机制的基础上,系统介绍本课题组在提升高镍正极材料电化学性能方面开展的一系列创新性包覆策略,旨在为高性能锂离子电池正极材料的开发应用提供新的思路。
中图分类号:
胡成志, 王国贤, 唐伟建, 李阿飞, 陈章贤, 杨则恒, 张卫新. 高比能锂离子电池高镍正极材料的表面包覆改性研究进展[J]. 化工学报, 2024, 75(11): 4020-4036.
Chengzhi HU, Guoxian WANG, Weijian TANG, Afei LI, Zhangxian CHEN, Zeheng YANG, Weixin ZHANG. Research progress on surface coating modification of nickel-rich cathode materials for high energy density lithium-ion battery[J]. CIESC Journal, 2024, 75(11): 4020-4036.
图5 基于近平衡态沉积策略在NCM811正极材料表面均匀包覆Li2TiO3[68]
Fig.5 Uniform coating of Li2TiO3 on the surface of NCM811 cathode material based on near-equilibrium deposition strategy[68]
图8 基于乳酸辅助策略在NCM811正极材料表面构建非晶稳定包覆层[76]
Fig.8 Constructing amorphous stabilizing coating on NCM811 cathode material surface via lactic acid assisted strategy[76]
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