Crystal Plane Shielding and D-Band Modulation Synergistically Achieve Durable (100) Textured Zinc Anodes

Abstract

Problems of dendrites formation, hydrogen evolution reaction (HER) and zinc anode corrosion have restricted the performance of aqueous zinc-ion batteries (AZIB). In this work, we introduce 2-butene-1,4-diol (BED) into ZnSO4 (ZSO) electrolyte which can both guide the zinc orientation and suppress the HER reaction by surface reconstruction. The preferential adsorption of BED on zinc (100) guides the vertically deposition of zinc, avoiding the dendrites generated by random deposition. In addition, BED restructures the electronic structure of the zinc surface, which inhibits the conversion of H+ to Had. As a result, ZSO electrolyte with BED can be stably cycled for more than 3000 h (1 mA cm-2, 1 mA h cm-2). Also, Zn||V2O5 full cell at 5 A g-1 preserves 80.4% capacity with 218.1 mA h g-1 after 1000 cycles. Our research constructs durable (100) plane anodes and provides new insights into the mechanisms by which additives enhance the performance of zinc anodes.