Issue 4, 2023

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

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 LiMn0.8Fe0.2PO4@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 LiMn0.8Fe0.2PO4@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.

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

Supplementary files

Article information

Article type
Research Article
Submitted
29 Oct 2022
Accepted
23 Dec 2022
First published
20 Jan 2023

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

LiMn0.8Fe0.2PO4@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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