Rocking-chair proton battery based on a low-cost “water in salt” electrolyte

Beibei Yang; Tian Qin; Yanyan Du; Yulin Zhang; Jin Wang; Tingting Chen; Ming Ge; Duan Bin; Cunwang Ge; Hongbin Lu

doi:10.1039/D1CC06325A

Rocking-chair proton battery based on a low-cost “water in salt” electrolyte†

Beibei Yang,‡^a Tian Qin,‡^a Yanyan Du,^a Yulin Zhang,^a Jin Wang,^a Tingting Chen,^a Ming Ge,^a Duan Bin,

*^a Cunwang Ge*^a and Hongbin Lu*^a

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* Corresponding authors

^a Department of Chemistry and Chemical Engineering, Nantong University, Nantong, Jiangsu, P. R. China
E-mail: dbin17@fudan.edu.cn, gecunwang@ntu.edu.cn, luhb@nju.edu.cn

Abstract

A novel “water in salt” electrolyte is reported for the design of a rocking-chair proton battery. In 20 M ZnCl₂ + 1 M HCl electrolyte, the electrochemical proton storage performance using MoO₃ is significantly improved. When coupled with a Ni-PBA cathode, the device exhibits a good cycling stability of 76.1% after 400 cycles. This work opens a new avenue for designing low-cost “water in salt” electrolytes for aqueous proton electrochemistry.

Chemical Communications

Rocking-chair proton battery based on a low-cost “water in salt” electrolyte†

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Rocking-chair proton battery based on a low-cost “water in salt” electrolyte

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