An extended π-conjugated bipolar polymer cathode for rechargeable magnesium batteries: high capacity contributed by n- and p-doping and charge delocalization

An extended conjugated bipolar cathode material is developed for rechargeable Mg batteries, which undergoes p- and n-doping with charge delocalized to the large conjugated structures. The extended conjugated structure guarantees large charge density change and structure stability, leading to high capacity and good cycling stability.