Silica-based electrolyte regulation for stable aqueous zinc-manganese batteries

Abstract

A practical Zn-MnO₂ battery is still challenged by the deterioration stability under the low current density due to the activeness of water in aqueous electrolyte. Herein, we reported a novel and practical hybrid silica-based ZnSO₄/MnSO₄ mixed solution (Si-ZMSO) electrolyte, which obviously improved the cycle stability of Zn-MnO₂ battery. The Si-ZMSO electrolyte can widen the ESW of electrolyte and restrain the side reaction of zinc anode, which can achieve a good cyclic stability over 400 h for Zn∥Zn symmetrical battery. This novel hybrid electrolyte can also stabilize the cyclic performance of Zn-MnO₂ batteries compared to ZMSO electrolyte. In particular, it exhibits a good capacity retention after 200 cycles under the high cathode loading and low current density. This novel strategy is expected to advance the development of Zn-MnO₂ batteries.

Keywords

hybrid electrolyte / SiO_x nanofibers / Zn anode / cyclic stability / Zn-MnO₂ battery

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