Direct regeneration of spent LiFePO4via a graphite prelithiation strategy

Tao Wang; Xiaoshuang Yu; Min Fan; Qinghai Meng; Yao Xiao; Ya-Xia Yin; Hongliang Li; Yu-Guo Guo

doi:10.1039/C9CC08155K

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Direct regeneration of spent LiFePO₄via a graphite prelithiation strategy†

Tao Wang,‡^ab Xiaoshuang Yu,‡^a Min Fan,^bc Qinghai Meng,

*^b Yao Xiao,^b Ya-Xia Yin,

^bc Hongliang Li*^a and Yu-Guo Guo

*^bc

Author affiliations

* Corresponding authors

^a Institute of Materials for Energy and Environment, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, P. R. China
E-mail: lhl@qdu.edu.cn

^b CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, P. R. China
E-mail: ygguo@iccas.ac.cn, qhmeng@iccas.ac.cn

^c University of Chinese Academy of Sciences, Beijing 100049, P. R. China

Abstract

The capacity degradation mechanism of a spent LiFePO₄ (LFP) cathode was investigated systematically and the occurrence of FePO₄ in the cathode due to loss of Li⁺ was found to be mainly responsible for the short cycle life of LFP batteries. Given this, an easy, low-cost, and green cathode regeneration method was proposed. This work provides a new perspective for the recycling of spent batteries.

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Article information

DOI: https://doi.org/10.1039/C9CC08155K
Article type: Communication
Submitted: 17 Oct 2019
Accepted: 25 Nov 2019
First published: 26 Nov 2019

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Chem. Commun., 2020,56, 245-248

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Direct regeneration of spent LiFePO₄via a graphite prelithiation strategy

T. Wang, X. Yu, M. Fan, Q. Meng, Y. Xiao, Y. Yin, H. Li and Y. Guo, Chem. Commun., 2020, 56, 245 DOI: 10.1039/C9CC08155K

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Chemical Communications