LiNi0.8Co0.15Al0.05O2正极活性材料的衰减机理及改性措施

doi:10.11896/j.issn.1005-023X.2017.01.003

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Abstract LiNi_0.8Co_0.15Al_0.05O₂ lithium ion batteries have extremely broad application prospect in electric vehicles and statio-nary storage batteries due to its high capacity and high power. To be more economically attractive, it requires the batteries to have a long life during both storage and operation, typically more than 15 years. However, it still remains a challenge to achieve this goal, that is to say the short service life of LIB is a technological bottleneck for its application in electronic vehicles. Therefore, investigating the degradation mechanism of lithium-ion cell plays an important role in the achievement of long life for lithium-ion cell. Extensive research has shown that the formation of surface film, appearance of a NiO-like resistance layer with Fm3m rock structure, the micro-crack generation and deterioration of conductive carbon matrix are considered to be the dominant factors for the degradation of capacity and power. The deterioration of the cathode can be suppressed to a certain degree by the conventional modification methods, such as atomic doping, surface coating.

Key words： NCA positive-electrode SEI film NiO-like phase micro-crack modifying methods

Published: 10 January 2017 Online: 2018-05-02

CLC number:

TB321

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	Articles by authors
	QIU Zhenping
	ZHANG Yingjie
	DONG Peng
	XIA Shubiao
	YAO Yao

Cite this article:

QIU Zhenping,ZHANG Yingjie,DONG Peng, et al. Degradation Analysis of LiNi_0.8Co_0.15Al_0.05O₂ Positive-electrode Active Material and Its Modification Methods[J]. Materials Reports, 2017, 31(1): 18-24.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.01.003 OR https://www.mater-rep.com/EN/Y2017/V31/I1/18

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