Surface Engineering of Zinc Anodes toward Durable Aqueous Zinc‐Ion Batteries

ABSTRACT The practical applications of aqueous zinc‐ion batteries (AZIBs) are hindered by Zn anode issues including dendrite growth, hydrogen evolution, passivation, and corrosion. To overcome these issues, surface modification stands out as an effective approach to enhance interfacial stability while retaining the intrinsic merits of Zn anodes. This review systematically summarizes recent advances in surface modification strategies for zinc anodes, focusing on mechanistic understanding, methodological innovations, and electrochemical performance. The key techniques, including protective coating deposition, functional interlayer construction, and in situ interface engineering, are critically examined to clarify their roles in regulating Zn ²⁺ flux, inhibiting side reactions, and improving electrochemical kinetics. Furthermore, the interaction between modified anode surfaces and electrolyte components is discussed to offer a comprehensive perspective on anode‐electrolyte synergy. Finally, we identify the persistent challenges related to the scalability, long‐term durability under practical conditions, and cost‐efficiency. We also propose future research directions, including the design of multifunctional hybrid coatings and the integration of machine learning‐assisted material screening, in conjunction with first‐principles calculations to predict the diffusion and deposition behavior of zinc ion at the electrode–electrolyte interface. This review aims to provide guidance for the rational design of durable zinc anodes, to facilitate the commercialization of AZIBs.