Enhancing the cycling stability of Co-free high-Ni layered cathodes through MgO surface engineering

Zi-Ting Zhou; Rui-Jie Luo; Chong-Yu Du; Chong-Hin Tam; Jie Zeng; Zhe Qian; Zhe Mei; Yue Gu; Cheng Zhang; Shuang-Fu Li; Ming-Xuan Yang; Hang Wang; Huan Ni; Xiang Yin; Liu Na; Kai Wu; Yong-Ning Zhou

doi:10.1039/D5CC03625A

Enhancing the cycling stability of Co-free high-Ni layered cathodes through MgO surface engineering

Zi-Ting Zhou,

^a Rui-Jie Luo,^a Chong-Yu Du,^a Chong-Hin Tam,^a Jie Zeng,^a Zhe Qian,^a Zhe Mei,^a Yue Gu,^a Cheng Zhang,^a Shuang-Fu Li,^b Ming-Xuan Yang,^b Hang Wang,^b Huan Ni,^b Xiang Yin,^b Liu Na,^b Kai Wu^b and Yong-Ning Zhou

*^a

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* Corresponding authors

^a Department of Materials Science, Fudan University, Shanghai 200433, PR China
E-mail: ynzhou@fudan.edu.cn

^b Contemporary Amperex Technology Co., Ningde, China

Abstract

A magnesium oxide (MgO) coating strategy is proposed for improving the cobalt-free high-nickel LiNi_0.9Mn_0.1O₂ cathode. It is revealed that a MgO coating can stabilize reversible Ni³⁺/Ni⁴⁺ redox and suppress structural degradation. The MgO coated LiNi_0.9Mn_0.1O₂ exhibits a promising capacity retention of 66.67% after 1000 cycles at 1C rate in a wide voltage range of 2.8–4.4 V.

This article is part of the themed collection: Chemistry for a Sustainable World – Celebrating Our Community Tackling Global Challenges

Chemical Communications

Enhancing the cycling stability of Co-free high-Ni layered cathodes through MgO surface engineering

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Enhancing the cycling stability of Co-free high-Ni layered cathodes through MgO surface engineering

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