Uncovering the untapped potential of copper(I) sulphide toward lithium-ion storage under ultra-low temperatures. Issue 12 (1st March 2023)

• Record Type: Journal Article
• Authors: Chen, Yifan; Wang, Jinze; Hong, Youran; Yang, Yusi; Tan, Lulu; Li, Nan; Ma, Can; Wang, Jiangwei; Fan, Xiulin; Zhu, Yujie
• Is Part Of: Journal of materials chemistry. Volume 11:Issue 12(2023)
• Page Start: 6168
• Page End: 6180
• Publication Date: 2023-03-01
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d3ta00213f
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : The superior lithium storage performance of commercially available Cu2 S under ultra-low temperature (−60 °C) is uncovered. The detailed reaction mechanism and mechanistic understanding of the excellent low-temperature performances are proposed. Abstract : Recently, to enhance the low-temperature performance of lithium-ion batteries (LIBs), significant efforts have been devoted to developing novel electrolytes with low viscosities, high conductivities, and facile Li-ion desolvation, while much less attention is paid to exploring optimum electrode materials for low-temperature LIBs. In this contribution, we discover that commercial microsized Cu2 S exhibits a remarkably high performance toward lithium storage under ultra-low temperatures. Under room temperature, it delivers a reversible specific capacity of 318.8 mA h g −1 with very flat lithiation–delithiation plateaus around 1.75 V in Li metal cells. At −60 °C and a galvanostatic charge–discharge rate of 0.3C, it could still provide a reversible specific capacity of 168.8 mA h g −1 with stable cycling performance, promising its application in ultra-low-temperature Li-based batteries. Through a combination of microscopic, spectroscopic, and electrochemical characterization bolstered by theoretical calculations, the detailed reaction mechanisms and mechanistic understanding of the excellent low-temperature performances are proposed. This work points out the great opportunities to enhance the low-temperature performance of LIBs by discovering suitable electrode materials.