Abstract: The present invention relates to a secondary cell in the form of a hybrid system of a zinc-air battery and a silver oxide-zinc battery, comprising an anode, a cathode, and an electrolyte. The anode contains zinc (Zn) and/or zinc oxide (ZnO2), and the cathode is configured as a gas diffusion electrode which contains a mixture of silver (Ag) and/or silver oxide (Ag2O/AgO) with a catalyst for the electrochemical oxygen evolution, wherein the catalyst is selected from cobalt oxide Co3O4), manganese oxide (Mn3O4 or MnO2), cobalt-nickel oxide (CoNiO2), lanthanum-calcium-cobalt oxide (LaxCa1-xCoO3), ruthenium oxide (RuO2), iridium oxide (IrO2), platinum (Pt), palladium (Pd), and mixtures thereof. The invention further relates to an accumulator which comprises one or a plurality of secondary cells, as well as a method for charging and a method for discharging a secondary cell or an accumulator.

Abstract: The present invention relates to a secondary cell in the form of a hybrid system of a zinc-air battery and a silver oxide-zinc battery, comprising an anode, a cathode, and an electrolyte. The anode contains zinc (Zn) and/or zinc oxide (ZnO2), and the cathode is configured as a gas diffusion electrode which contains a mixture of silver (Ag) and/or silver oxide (Ag2O/AgO) with a catalyst for the electrochemical oxygen evolution, wherein the catalyst is selected from cobalt oxide Co3O4), manganese oxide (Mn3O4 or MnO2), cobalt-nickel oxide (CoNiO2), lanthanum-calcium-cobalt oxide (LaxCa1-xCoO3), ruthenium oxide (RuO2), iridium oxide (IrO2), platinum (Pt), palladium (Pd), and mixtures thereof. The invention further relates to an accumulator which comprises one or a plurality of secondary cells, as well as a method for charging and a method for discharging a secondary cell or an accumulator.