Unlocking the potential of multi-electron p-type polyheterocycle cathode: when it meets small-size and high-charge anion

A multi-electron p-type polyheterocycle cathode compatible with the small-size and high-charge SO 4 2− anion unlocks high utilization (99.5%) of phenothiazine/piperazine units with ultralow activation energy (0.20 eV) for better Zn-organic batteries.