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Updated: Jul 11, 2025

Zinc-Sponge Battery Electrodes that Suppress Dendrites
Published on: September 29, 2020
Ammonium fluoride additive-modified interphase chemistry stabilizes zinc anodes in aqueous electrolytes
Wei Zhang1,2, Xian Wu2, Qingjin Fu2
1Christopher Ingold Laboratory, Department of Chemistry, University College London, London WC1H 0AJ, UK. i.p.parkin@ucl.ac.uk.
Abstract:
Herein, ammonium fluoride is reported as an additive within 1 M ZnSO4 aqueous electrolyte to improve zinc anodes. The as-formed electrostatic shielding layer and ZnF2-rich solid-state interphase layer can jointly inhibit side reactions and dendrite growth. Consequently, symmetric Zn‖Zn cells, asymmetric Zn‖Cu cells and Zn‖MnO2 cells with the additives present dramatically enhanced performance in comparison to the ones with pure ZnSO4 electrolyte counterparts. This work proposes a facile but effective method to achieve highly reversible zinc anodes.
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