In Situ Construction of Crystalline–Amorphous Hybrid Passive Interphase for Stable and Reversible Zinc Metal Anode

One advantage of aqueous zinc-ion batteries (AZIBs) is the utilization of zinc metal as an anode. However, the long-term stable operation of zinc metal anodes is hindered by dendrites and corrosion. Herein, we introduce a Zn–Y–V-oxide-based in situ passive interphase (PI) with a crystalline–amorphous hybrid structure that has been optimized for highly reversible Zn anodes. This interface layer enhances the corrosion resistance of the Zn anode in the electrolyte, reduces side reactions, and optimizes electro-crystallization orientation, resulting in dendrite-free plating. The Zn anode modified with PI exhibits remarkable stability, sustaining a reversible plating/stripping process for 2000 h at 1 mA·cm–2 while maintaining high cycling stability and good capacity retention when paired with NH4V4O10 or α-MnO2 cathodes. Our research presents a straightforward one-step reaction for the fabrication of an in situ PI, offering an approach toward durable long-lasting AZIBs.