One‐Step Construction of a Polyporous and Zincophilic Interface for Stable Zinc Metal Anodes

The development and application of rechargeable aqueous zinc‐ion batteries are seriously hindered by the problems of corrosion and dendrite growth on Zn metal anodes. Herein, a polyporous 3D zinc framework coupled with a zincophilic ZnSe overlayer (3D‐Zn@ZnSe) is synchronously obtained by one‐step electrochemical scanning, which precisely repairs intrinsic defects of the Zn foil surface and remodels the electrolyte/anode interface. The 3D‐Zn host formed by the pioneering electro‐oxidation significantly reduces the local current densities and facilitates adapting to the volume change during the plating/stripping. Meanwhile, the ZnSe overlayer obtained by electro‐deposition restrains the side reactions and promotes efficient desolvation, resulting in the acceleration of the deposition kinetics of Zn2+ on the zinc anode. As a result, the anodes present an enhanced cycling stability of zinc plating/stripping for over 2000 h with low overpotential, and the assembled 3D‐Zn@ZnSe||V2O5 cell retains 90.63% of its original capacity after 8500 cycles. The one‐step fabrication of polyporous interfaces with a zincophilic overlayer presents a promising strategy on improving the stability and reversibility of zinc anode for zinc‐based batteries. One‐step electrochemical pre‐treatment not only constructs a polyporous 3D zinc framework, but also forms a zincophilic ZnSe overlayer. Moreover, the defects of zinc anode surface are also repaired. The remodeled anode/electrolyte interface not only effectively inhibits zinc dendrite growth and hydrogen generation, but also accommodates the volume change of the anode during plating/stripping, thus significantly extending the cycle life of the assembled cells.