A d-glucosamine hydrochloride regulated solvation structure for long life aqueous zinc batteries

Abstract

In the past decade, aqueous zinc ion batteries (AZIBs) have been developed rapidly in the field of energy storage. However, their practical application is constrained by the issues of severe dendrite growth and side reactions. Herein, we introduce D-glucosamine hydrochloride (DGH) into a ZnSO₄ (ZSO) electrolyte to change the solvation structure of Zn²⁺. It effectively impedes the hydrogen evolution reaction (HER) at the electrode/electrolyte interface and restrains dendrite growth at the anode. Moreover, Zn//Zn symmetric cells work stably for 2700 h at 1 mA cm⁻² and 1 mA h cm⁻² with the ZSO + DGH electrolyte. The assembled Zn//NH₄V₄O₁₀ batteries deliver an initial capacity of 290.10 mA h g⁻¹ at a current density of 5.0 A g⁻¹.