Synergistic electronic and crystal structure regulation of Na2+2xFe2−x(SO4)3 via Zr doping for high-performance sodium-ion batteries

Xianbi Zhang; Shuang Xiang; Xiaobing Huang; Dan Sun; Yougen Tang; Haiyan Wang

doi:10.1039/D5CC04836B

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Synergistic electronic and crystal structure regulation of Na_2+2xFe_2−x(SO₄)₃via Zr doping for high-performance sodium-ion batteries

Xianbi Zhang,^a Shuang Xiang,^a Xiaobing Huang,

^b Dan Sun,

*^a Yougen Tang

*^a and Haiyan Wang

*^a

Author affiliations

* Corresponding authors

^a Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha, P. R. China
E-mail: sundan4330@csu.edu.cn, ygtang@csu.edu.cn, wanghy419@csu.edu.cn

^b College of Chemistry and Materials Engineering, Hunan University of Arts and Science, Changde 415000, Hunan, China

Abstract

Na_2.5Fe_1.71Zr_0.02(SO₄)₃ with a synergistically optimized electronic and crystal structure is designed for high-performance sodium ion batteries. The orbital interaction induced by Zr doping significantly improves its intrinsic conductivity. Additionally, the longer Na–O bonds after Zr doping accelerate the Na⁺ transfer kinetics. Ultimately, Na_2.5Fe_1.71Zr_0.02(SO₄)₃ exhibits a high specific capacity of 96.4 mAh g⁻¹ at 0.1C with 85% retention after 10 000 cycles at 30C.

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Article information

DOI: https://doi.org/10.1039/D5CC04836B
Article type: Communication
Submitted: 22 Aug 2025
Accepted: 30 Sep 2025
First published: 01 Oct 2025

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Chem. Commun., 2025, Advance Article

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Synergistic electronic and crystal structure regulation of Na_2+2xFe_2−x(SO₄)₃ via Zr doping for high-performance sodium-ion batteries

X. Zhang, S. Xiang, X. Huang, D. Sun, Y. Tang and H. Wang, Chem. Commun., 2025, Advance Article , DOI: 10.1039/D5CC04836B

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