Ammonium fluoride additive-modified interphase chemistry stabilizes zinc anodes in aqueous electrolytes

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.