In-situ electrochemical activation accelerates the magnesium-ion storage

Xuelian Qu, Guodong Li, Fengmei Wang, Ying Zhang, Tianyi Gao, Yutong Luo, Yun Song, Fang Fang, Dalin Sun (), Fei Wang () and Yang Liu ()
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Xuelian Qu: Fudan University
Guodong Li: Fudan University
Fengmei Wang: Fudan University
Ying Zhang: Fudan University
Tianyi Gao: Fudan University
Yutong Luo: Fudan University
Yun Song: Fudan University
Fang Fang: Fudan University
Dalin Sun: Fudan University
Fei Wang: Fudan University
Yang Liu: Fudan University

Nature Communications, 2025, vol. 16, issue 1, 1-10

Abstract: Abstract Rechargeable magnesium batteries (RMBs) have emerged as a highly promising post-lithium battery systems owing to their high safety, the abundant Magnesium (Mg) resources, and superior energy density. Nevertheless, the sluggish kinetics has severely limited the performance of RMBs. Here, we propose an in-situ electrochemical activation strategy for improving the Mg-ion storage kinetics. We reveal that the activation strategy can effectively optimize surface composition of cathode that favors Mg-ion transport. Cooperating with lattice modifications, the CuSe | |Mg batteries exhibit a specific capacity around 160 mAh/g after 400 cycles with a capacity retention of over 91% at the specific current of 400 mA/g. Of significant note is the slight decay in specific capacity from 205 to 141 mAh/g has been observed with an increase in specific current from 20 to 1000 mA/g. This strategy provides insights into accelerating Mg-ion storage kinetics, achieving a promising performance of RMBs especially at high specific current.

Date: 2025
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DOI: 10.1038/s41467-025-56556-9

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