Abstract
HighlightsAqueous zinc-manganese batteries with reversible Mn2+/Mn4+ double redox are achieved by carbon-coated MnOx nanoparticles.Combined with Mn2+-containing electrolyte, the MnOx cathode achieves an ultrahigh energy density with a peak of 845.1 Wh kg−1 and an ultralong lifespan of 1500 cycles.The electrode behaviors and reaction mechanism are systematically discussed by combining electrochemical measurements and material characterization.
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