The key role of concentrated Zn(OTF)2 electrolyte in the performance of aqueous Zn-S batteries

Zhao Xu; Yan Zhang; Wenshan Gou; Mengmeng Liu; Yifei Sun; Xuguang Han; Wei Sun; Changming Li

doi:10.1039/d2cc02075k

The key role of concentrated Zn(OTF)₂ electrolyte in the performance of aqueous Zn-S batteries

Chem Commun (Camb). 2022 Jul 19;58(58):8145-8148. doi: 10.1039/d2cc02075k.

Authors

Zhao Xu¹, Yan Zhang¹, Wenshan Gou¹, Mengmeng Liu¹, Yifei Sun¹, Xuguang Han¹, Wei Sun², Changming Li^{1

3}

Affiliations

¹ Institute of Advanced Cross-field Science, College of Life Sciences, Qingdao University, Qingdao, 11065, P. R. China. yzhang_iacs@qdu.edu.cn.
² College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou, 571158, P. R. China.
³ Institute of Materials Science and Devices, School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215011, P. R. China.

PMID: 35775961
DOI: 10.1039/d2cc02075k

Abstract

In this communication, the electrolyte chemistry in aqueous Zn-S batteries was illustrated systematically. Compared to Zn(AC)₂ and ZnSO₄, Zn(OTF)₂ electrolyte can achieve better electrochemical performance due to the impact of larger CF₃SO₃^- anions on the solvation shell structure of Zn²⁺. Moreover, a reversible capacity of 788 mA h g^-1 in concentrated Zn(OTF)₂ electrolyte (3 M) is obtained and shows higher retention due to higher Zn-nucleation overpotential and slower corrosion reactions.