Zn2+-blocking effects of a proton-rich polyaniline layer enable Ah-level Zn–MnO2 batteries

Herein, we introduced a PANI layer to provide a proton-rich micro-environment for an organic modified MnO 2 cathode featuring Mn–N bonds, enabling selective H + insertion rather than Zn 2+ and reversible MnO 2 /Mn 2+ redox for advanced Zn–MnO 2 batteries.