Zinc Dendrite Suppression Effect of Amine Additives for Zinc Anodes

Zinc secondary batteries is a promising candidate for large-scale energy storage facilities owing to their high specific energy capacity, safe aqueous electrolytes, abundant zinc resources, environmental sustainability, and cost-effectiveness. However, the application of zinc as a negative electrode in alkaline electrolytes has been hindered by shape change and dendrite growth during extended charge/discharge cycling. These dendrite growth issues significantly degrade the cycle characteristics and directly result in shortened battery lifetimes. This study addresses these challenges by demonstrating the effect of a small quantity of additive, 3,3-diaminopropylamine (Bis3), within a highly concentrated KOH aqueous electrolyte on dendrite formation during the cycling of zinc secondary batteries. The results indicate that Bis3 addition to a concentrated KOH electrolyte effectively inhibits the formation of zinc dendrites.