Innentitelbild: Activating and Stabilizing a Reversible four Electron Redox Reaction of I−/I+ for Aqueous Zn‐Iodine Battery (Angew. Chem. 25/2024)

The energy density of aqueous zinc ion batteries is greatly affected by the low energy density, low potential and low power density of the cathode material. In their Research Article (e202403187), Xijin Xu, Huiqiao Li et al. report a method to activate and stabilize a highly reversible four‐electron redox reaction between I− and I+ by introducing Br− as a mediator, which greatly promotes the capacity and effectively suppresses iodine shuttling for high cycling stability.