锂离子电池三元正极材料LiNi0.8Co0.1Mn0.1O2的研究进展

杨凯旭

化工新型材料 ›› 2022, Vol. 50 ›› Issue (8) : 67 -73.

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化工新型材料 ›› 2022, Vol. 50 ›› Issue (8) : 67-73. DOI: 10.19817/j.cnki.issn1006-3536.2022.08.013
综述与专论

锂离子电池三元正极材料LiNi0.8Co0.1Mn0.1O2的研究进展

    杨凯旭
作者信息 +

Research progress on ternary cathode material LiNi0.8Co0.1Mn0.1O2 for Li-ion battery

  • Yang Kaixu
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摘要

LiNi0.8Co0.1Mn0.1O2(NCM811)是高镍三元正极材料的典型代表,具有比容量高、成本低等优点,被认为是极具竞争力的锂离子电池理想候选正极材料之一。然而,NCM811正极材料的高镍含量使阳离子混排、表面缺陷和微裂纹等结构缺陷更加突出,导致材料的容量衰减快、循环性和热稳定性差,限制了其大规模的商业化应用。首先简要论述了NCM811结构缺陷的起源及其对电化学性能的影响机制,在总结形貌调控、体相掺杂、表面包覆和特殊结构设计等四个方面提高电化学性能的最新研究进展基础上,展望了NCM811正极材料未来的发展方向。

Abstract

LiNi0.8Co0.1Mn0.1O2(NCM811) is the typical representative of high-nickel ternary cathode material,which owns the advantages of high specific capacity and low cost.It is considered as one of the most competitive cathode materials for Li-ion batteries.However,the high-nickel content of NCM811 cathode material makes the structural defects such as cation mixings,surface defects and microcracks become more prominent,those problems lead to quick attenuation of capacity,poor cycling and thermal stability,which limits its wide application in the field of business.The origin of structural defects and its influence mechanism on electrochemical performance were discussed at first.Then it sumed up the newst research progress which was meant to improve the electrochemical performance from four aspects:morphology control,doping,surface coating and special structure design,respectively.The perspective was discussed to provide the future direction of NCM811 cathode materials at last.

关键词

锂离子电池 / NCM811 / 结构缺陷 / 改性 / 电化学性能

Key words

lithium ion battery / NCM811 / structural defect / improvement / electrochemical performance

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锂离子电池三元正极材料LiNi0.8Co0.1Mn0.1O2的研究进展[J]. 化工新型材料, 2022, 50(8): 67-73 DOI:10.19817/j.cnki.issn1006-3536.2022.08.013

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