Design and Structure of Electrolytes for All‐Weather Aqueous Zinc Batteries

Abstract Rechargeable aqueous zinc batteries (AZBs) utilizing water‐borne electrolytes are intrinsically safe electrochemical devices that are promising in next‐generation energy storage. Such application requires adaptivity to global climate, especially at grid‐scale, thus their stability of electrochemical performance at varying temperatures is critical. Many essential properties of AZBs, i.e., ion transfer, redox kinetics, etc., are largely governed by the aqueous electrolytes in the batteries because of the relatively limited stable phase temperature of water. This limitation is extremely vital in cold regions since charging and discharging become more difficult at the sub‐zero range due to water freezing. Despite the development of various electrolyte strategies in recent years, comprehensive reviews focusing on this topic remain limited. This research reviews the diverse reasons underneath the failure of AZBs at extreme temperatures and provides a thorough analysis of possible resolutions from an electrolyte perspective. It starts with the challenges faced by AZBs at both high and low temperatures concerning the electrolytes. Different strategies addressing these challenges are discussed, providing insights into aqueous batteries under extreme temperature conditions. Finally, the review concludes with a summary and outlook on the design and structure of electrolytes for all‐weather AZBs, integrating innovative strategies from both aqueous and non‐aqueous battery systems.