Efficient direct repairing of lithium- and manganese-rich cathodes by concentrated solar radiation

Hailong Wang, Xin Geng, Linyu Hu, Jun Wang, Yunkai Xu, Yudong Zhu, Zhimeng Liu, Jun Lu (), Yuanjing Lin () and Xin He ()
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Hailong Wang: Sichuan University
Xin Geng: Sichuan University
Linyu Hu: Southern University of Science and Technology
Jun Wang: Southern University of Science and Technology
Yunkai Xu: Zhejiang University
Yudong Zhu: Southern University of Science and Technology
Zhimeng Liu: Sichuan University
Jun Lu: Zhejiang University
Yuanjing Lin: Southern University of Science and Technology
Xin He: Sichuan University

Nature Communications, 2024, vol. 15, issue 1, 1-13

Abstract: Abstract Lithium- and manganese-rich layered oxide cathode materials have attracted extensive interest because of their high energy density. However, the rapid capacity fading and serve voltage decay over cycling make the waste management and recycling of key components indispensable. Herein, we report a facile concentrated solar radiation strategy for the direct recycling of Lithium- and manganese-rich cathodes, which enables the recovery of capacity and effectively improves its electrochemical stability. The phase change from layered to spinel on the particle surface and metastable state structure of cycled material provides the precondition for photocatalytic reaction and thermal reconstruction during concentrated solar radiation processing. The inducement of partial inverse spinel phase is identified after concentrated solar radiation treatment, which strongly enhances the redox activity of transition metal cations and oxygen anion, and reversibility of lattice structure. This study sheds new light on the reparation of spent cathode materials and designing high-performance compositions to mitigate structural degradation.

Date: 2024
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DOI: 10.1038/s41467-024-45754-6

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