Towards Superior Aqueous Zinc‐Ion Batteries: The Insights of Artificial Protective Interfaces

Abstract

Aqueous zinc ion batteries (AZIBs) with metallic Zn anode have the potential for large‐scale energy storage application due to their cost‐effectiveness, safety, environmental‐friendliness, and ease of preparation. However, the concerns regarding dendrite growth and side reactions on Zn anode surface hamper AZIB's commercialization. This review aims to give a comprehensive evaluation of the protective interphase construction and provide guildance to further improve the electrochemical performance of AZIBs. The failure behaviors of Zn metal anode including dendrite growth, corrosion, and hydrogen evolution are analyzed. Then, the applications and mechanisms of the constructed interphases are introduced, classified by the material species. The fabrication methods of the artificial interfaces are summarized and evaluated, including the in‐situ strategy and ex‐situ strategy. Finally, the characterization means of the interphases are discussed to give a full view for the study of Zn anode protection. Based on the analysis of this review, a stable and high‐performance Zn anode could be designed by carefully choosing applied material, corresponding protective mechanism, and appropriate construction technique. Additionally, this review for Zn anode modification and construction techniques for anode protection in AZIBs may be helpful in other aqueous metal batteries with similar problems.