Chemical Welding of the Electrode–Electrolyte Interface by Zn‐Metal‐Initiated In Situ Gelation for Ultralong‐Life Zn‐Ion Batteries

, the cell still operates stably for 240 h, alongside a high Zn utilization with 87% depth of discharge. The in situ gel electrolyte integrating robust interface and preparation of all-in-one cells demonstrate a commercializable path for aqueous Zn-storage devices.