Cationic Co-doping in copper sulfide nanosheet cathodes for efficient magnesium storage

Xin Liu, Youqi Zhu*, Changliang Du, Jiachen Tian, Lifen Yang, Xiuyun Yao, Zhitao Wang, Xilan Ma, Jianhua Hou, Chuanbao Cao

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

24 引用 (Scopus)

摘要

Sluggish kinetics and inferior redox reversibility have limited the further development of the CuS cathode material in advanced rechargeable magnesium batteries. Herein, a cation-doping strategy is reported to regulate the electrochemical Mg2+ storage behaviors of Co-doped CuS nanosheet cathodes via an effective microwave assisted synthesis technique. With cationic Co-doping, the fast electrochemical diffusion kinetics and optimized reversible redox reaction could be achieved over Co-doped CuS nanosheet cathodes. Specifically, the optimized Co-doped CuS nanosheet cathodes deliver excellent reversible capacity of 297 mAh g−1 under 200 mA g−1, outstanding rate capabilities of 143.4 mAh g−1 at 1.0 A g−1, and enhanced long-term cyclic life with 0.0722 % capacity decay of per cycle at 1.0 A g−1. The enriched electrochemical performance of Co-doped CuS nanosheet cathodes can be attributed to the cation-doping effect that could efficiently shield the strong Coulombic effect among magnesium ions and host anions to accelerate Mg2+ diffusion kinetics. Therefore, the cationic Co-doping strategy provides a novel avenue to regulate the favorable cathode reaction for rapid magnesium storage.

源语言英语
文章编号142433
期刊Chemical Engineering Journal
463
DOI
出版状态已出版 - 1 5月 2023

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