Selective lithium extraction and Fe–P component reconstruction toward high-performance Na4Fe3(PO4)2P2O7 as cathode materials of sodium ion batteries

Pei Yang; Chao Sun; Pei-yao Li; Qing Wen; Yu-jing Chen; Tian Chen; Xia-hui Zhang; Jun-chao Zheng

doi:10.1039/D5CC02521D

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Selective lithium extraction and Fe–P component reconstruction toward high-performance Na₄Fe₃(PO₄)₂P₂O₇ as cathode materials of sodium ion batteries†

Pei Yang,^a Chao Sun,

^a Pei-yao Li,^a Qing Wen,^a Yu-jing Chen,^a Tian Chen,^a Xia-hui Zhang

*^a and Jun-chao Zheng

*^a

Author affiliations

* Corresponding authors

^a School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China
E-mail: xhzhang@csu.edu.cn, jczheng@csu.edu.cn

Abstract

Na₂S₂O₈ oxidation reclaims 98.08% Li from spent LiFePO₄, while residual Fe–P components are reconstituted into Na₄Fe₃(PO₄)₂P₂O₇/C via Na-insertion and carbon coating. The regenerated cathode delivers 99.74% capacity retention (400 cycles, 1C) and 97.23% retention after 600 cycles (5C), demonstrating superior cyclability for sustainable battery recycling and low-cost energy storage.

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Article information

DOI: https://doi.org/10.1039/D5CC02521D
Article type: Communication
Submitted: 03 mag 2025
Accepted: 30 giu 2025
First published: 01 lug 2025

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Chem. Commun., 2025, Advance Article

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Selective lithium extraction and Fe–P component reconstruction toward high-performance Na₄Fe₃(PO₄)₂P₂O₇ as cathode materials of sodium ion batteries

P. Yang, C. Sun, P. Li, Q. Wen, Y. Chen, T. Chen, X. Zhang and J. Zheng, Chem. Commun., 2025, Advance Article , DOI: 10.1039/D5CC02521D

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