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Chemical Communications

Non-topotactic transformation pathway in electrochemical Li+/Na+ ion-exchanged Na–Mn–Fe phosphates for sodium-ion batteries

Peiyao Li,†a   Kunmei Yang,†a   Yingde Huang,b   Yujing Chen,a   Dinghao Le,a   Pei Yang,a   Tian Chen,a   Xiahui Zhang ORCID logo *a  and  Junchao Zheng ORCID logo *a  

* Corresponding authors

a National Key Laboratory of Energy Metal Resources and New Materials, School of Metallurgy and Environment, Central South University, Changsha, Hunan 410083, China
E-mail: jczheng@csu.edu.cn

b School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China

Abstract

Herein, olivine-LiMn0.6Fe0.4PO4 is converted to triphylite-NaMn0.6Fe0.4PO4 via electrochemical ion-exchange, exhibiting unexpected non-topotactic phase transformation behavior. This cathode material demonstrates an energy density exceeding 400 Wh kg−1 in sodium-ion batteries. This study provides new insights into ion exchange chemistry.

Graphical abstract: Non-topotactic transformation pathway in electrochemical Li+/Na+ ion-exchanged Na–Mn–Fe phosphates for sodium-ion batteries

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Article information

DOI
https://doi.org/10.1039/D6CC00077K
Article type
Communication
Submitted
06 Jan 2026
Accepted
17 Feb 2026
First published
18 Feb 2026

Chem. Commun., 2026, Advance Article

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Non-topotactic transformation pathway in electrochemical Li+/Na+ ion-exchanged Na–Mn–Fe phosphates for sodium-ion batteries

P. Li, K. Yang, Y. Huang, Y. Chen, D. Le, P. Yang, T. Chen, X. Zhang and J. Zheng, Chem. Commun., 2026, Advance Article , DOI: 10.1039/D6CC00077K

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