Structural elucidation of the degradation mechanism of nickel-rich layered cathodes during high-voltage cycling

Jing Lai; Jun Zhang; Zuowei Li; Yao Xiao; Weibo Hua; Zhenguo Wu; Yanxiao Chen; Yanjun Zhong; Wei Xiang; Xiaodong Guo

doi:10.1039/D0CC00327A

Structural elucidation of the degradation mechanism of nickel-rich layered cathodes during high-voltage cycling†

Jing Lai,^a Jun Zhang,^b Zuowei Li,^a Yao Xiao,^a Weibo Hua,

*^c Zhenguo Wu,

*^a Yanxiao Chen,

^a Yanjun Zhong,

^a Wei Xiang^d and Xiaodong Guo^a

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* Corresponding authors

^a School of Chemical Engineering, Sichuan University, Chengdu 610065, P. R. China
E-mail: zhenguowu@scu.edu.cn

^b Ruyuan Dongyangguang Magnetic Materials Co., Ltd, Guangdong, Ruyuan, P. R. China

^c Institute for Applied Materials (IAM), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
E-mail: weibo.hua@kit.edu

^d College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, P. R. China

Abstract

Phase transition occurring during cycling plays a fundamentally important role in the cycling performance of nickel-rich cathodes. Here, splitting of two O3 phases, rather than the often observed O1 phases in the conventional LiCoO₂ electrode, was discovered in LiNi_0.85Co_0.10Mn_0.05O₂ at a high-voltage region (>4.6 V). Such degradation could be mitigated via Al doping.

Chemical Communications

Structural elucidation of the degradation mechanism of nickel-rich layered cathodes during high-voltage cycling†

Abstract

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Structural elucidation of the degradation mechanism of nickel-rich layered cathodes during high-voltage cycling

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