Reduced Graphene Oxides Skeleton Hybrid Interface Enables Long Lifespan Zinc Metal Anodes

Abstract With the ever‐growing demands for the electrical energy storage market, aqueous zinc‐ion batteries (AZIBs) are showing great prospects owing to their good capacity, low cost, and high safety. Nevertheless, they also face significant challenges, particularly in the form of zinc dendrite growth and inadequate stability. Here, a strategy based on reduced graphene oxides‐zirconium dioxide (rGO/ZrO₂) hybrid interface to enable long lifespan zinc metal anodes is proposed. Via in situ electrochemical deposition and self‐assembly method, rGO and ZrO₂ are deposited on the zinc metal anode successively, and their loading is optimized subsequently. In the functionalized interface, rGO serves as the skeleton and improves electrolyte ion diffusion, while ZrO₂ relieves the electric field concentration problem and inhibits dendrite growth. As a result, the Zn@rGO@ZrO₂ symmetric cell achieves a highly reversible cycle of 3000 h at 2.0 mA cm⁻²/1.0 mA h cm⁻² and fast reaction kinetics.