High-rate cathode CrSSe based on anion reactions for lithium-ion batteries

Si-Yu Yang; Ding-Ren Shi; Tian Wang; Xin-Yang Yue; Lei Zheng; Qing-Hua Zhang; Lin Gu; Xiao-Qing Yang; Zulipiya Shadike; Hong Li; Zheng-Wen Fu

doi:10.1039/D0TA08012H

High-rate cathode CrSSe based on anion reactions for lithium-ion batteries†

Si-Yu Yang,‡^a Ding-Ren Shi,‡^a Tian Wang,^a Xin-Yang Yue,^b Lei Zheng,^c Qing-Hua Zhang,^d Lin Gu,

^d Xiao-Qing Yang,

^e Zulipiya Shadike,*^e Hong Li

*^fg and Zheng-Wen Fu

*^a

Author affiliations

* Corresponding authors

^a Shanghai Key Laboratory of Molecular Catalysts and Innovative Materials, Department of Chemistry, Fudan University, Shanghai, China
E-mail: zwfu@fudan.edu.cn

^b Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, P. R. China

^c Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan, China

^d Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, PO Box 603, Beijing 100190, P. R. China

^e Chemistry Division, Brookhaven National Laboratory, Upton, NY, USA
E-mail: zshadike@bnl.gov

^f Tianmu Lake Institute of Advanced Energy Storage Technologies, Yangtze River Delta Physics Research Center, Liyang City, Jiangsu, China

^g Institute of Physics, Chinese Academy of Sciences, Beijing, China

Abstract

Studies of transition metal dichalcogenides (TMDs) can be traced back to the 1970s but they have been abandoned for a while due to the fire hazard of lithium metal batteries. Herein, a new layered material, CrSSe, is reported, whose intercalative capacity can achieve 190 mA h g⁻¹ with charges all compensated by anionic S and Se. Fascinating performances of half-cells are also presented, with a capacity retention rate of 81.5% upon 1000 cycles at 20C and a high output of 101.7 mA h g⁻¹ even at 200C. In addition, an ideal way to build a type of full battery without lithium anodes for CrSSe is also displayed; a Li₃N film was synthesized on the electrode surface as a lithium source. Overall, the discovery of CrSSe enriches the chemistry of TMDs and the application in full batteries opens up opportunities for enabling lithium-free cathodes to be widely utilized in practical applications.

This article is part of the themed collection: Journal of Materials Chemistry A HOT Papers

Journal of Materials Chemistry A

High-rate cathode CrSSe based on anion reactions for lithium-ion batteries†

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High-rate cathode CrSSe based on anion reactions for lithium-ion batteries

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