LiMn0.8Fe0.2PO4@C cathode prepared via a novel hydrated MnHPO4 intermediate for high performance lithium-ion batteries

Taotao Zeng; Dai-Huo Liu; Changling Fan; Runzheng Fan; Fuquan Zhang; **shui Liu; Tingzhou Yang; Zhongwei Chen

doi:10.1039/D2QI02306G

LiMn_0.8Fe_0.2PO₄@C cathode prepared via a novel hydrated MnHPO₄ intermediate for high performance lithium-ion batteries†

Taotao Zeng,^ab Dai-Huo Liu,

^bc Changling Fan,

*^ad Runzheng Fan,^a Fuquan Zhang,^ad **shui Liu,*^ad Tingzhou Yang^b and Zhongwei Chen

*^b

Author affiliations

* Corresponding authors

^a College of Materials Science and Engineering, Hunan University, Changsha 410082, China
E-mail: fancl@hnu.edu.cn, jshliu@hnu.edu.cn

^b Department of Chemical Engineering, Waterloo Institute for Nanotechnology, Waterloo Institute for Sustainable Energy, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
E-mail: zhwchen@uwaterloo.ca

^c Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, **nxiang, China

^d Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, Hunan University, Changsha 410082, China

Abstract

With the rapid development of global electro-mobility and the impact of the Russian–Ukrainian war, the increasing cobalt and nickel prices have resulted in supply chain issues for the lithium-ion battery industry. Several types of cathode materials based on low-cost metals, such as manganese and iron, have been widely studied for lithium-ion batteries. Herein, a well-crystallized LiMn_0.8Fe_0.2PO₄@C cathode with a homogeneous structure is synthesized using hydrated MnHPO₄ as the precursor. Due to the synergistic effect of oxalic acid on the chelation and reduction of transition metals, a highly stable intermediate hydrated MnHPO₄ is constructed, which exhibits a similar structure to LiMnPO₄, further promoting the structural transformation from MnHPO₄ to LiMnPO₄. The obtained LiMn_0.8Fe_0.2PO₄@C exhibits a high electrical conductivity of 6.823 × 10⁻² S cm⁻¹ and excellent cycling stability with a capacity retention of 98.62% after 200 cycles. This work provides a scalable route for the design of low-cost and high-performance cathode materials for commercial lithium-ion batteries.

This article is part of the themed collection: 2023 Inorganic Chemistry Frontiers HOT articles

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Article information

DOI: https://doi.org/10.1039/D2QI02306G
Article type: Research Article
Submitted: 29 Oct 2022
Accepted: 23 Dec 2022
First published: 20 Jan 2023

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Inorg. Chem. Front., 2023,10, 1164-1175

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LiMn_0.8Fe_0.2PO₄@C cathode prepared via a novel hydrated MnHPO₄ intermediate for high performance lithium-ion batteries

T. Zeng, D. Liu, C. Fan, R. Fan, F. Zhang, J. Liu, T. Yang and Z. Chen, Inorg. Chem. Front., 2023, 10, 1164 DOI: 10.1039/D2QI02306G

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