Shielding‐Anchoring Double Protection Tactics of Imidazo[1,2‐b]pyridazine Additive for Ultrastable Zinc Anode

Abstract

Abstract Aqueous zinc‐based energy storage devices have competitive advantages such as high power density, good safety, and wide source. However, because of the direct touch among zinc anode and aqueous electrolyte, dendrite growth and electrode side reactions are easy to occur in the plating and striping process, which seriously hinders the further development of aqueous zinc‐based energy storage devices. Therefore, it is urgent to solve the above problems to expand the existing energy storage devices. In this work, by adding an imidazo[1,2‐b]pyridazine (IP) electrolyte additive, the dendrites' growth and corrosion on the zinc anode surface could be effectively inhibited by the shielding‐anchoring double effects, which are verified by the comprehensive in situ and ex situ characterization techniques as well as the theoretical calculation support. Accordingly, the IP‐based electrolyte encourages extremely high stable zinc anode (cycling 2200 h at 1 mA cm −2 ) with high average Coulombic efficiency (98.72%). Moreover, the IP‐based Zn‐V 2 O 5 full battery also exhibits excellent reversible capacity, reaching 160.8 mAh g −1 after 400 cycles at 2 A g −1 . Through a straightforward alteration to the Zn anode surface, this study considerably enhances the use of highly stable and secure aqueous zinc‐ion batteries.