Rechargeable aluminum-air electrochemical cell

Secondary aluminum-air electrochemical cell comprising:

• a first positive electrode (3) and a second positive electrode (3) electrically connected to one another, to form the cathode (2);
• a negative electrode (5) that forms the anode (1), placed between the first positive electrode (3) and the second positive electrode (3);
• a first separation membrane (4) placed between the first positive electrode (3) and the negative electrode (5);
• a second separation membrane (4) placed between the second positive electrode (3) and the negative electrode (5);
• a non-aqueous electrolyte (7) that covers the first positive electrode (3), the second positive electrode (3), the negative electrode (5), the first separation membrane (4) and the second separation membrane (4);
• a micro-perforated housing (6) that comprises the first positive electrode (3), the second positive electrode (3), the negative electrode (5), the first separation membrane (4), the second separation membrane (4) and the electrolyte (7);
• where each positive electrode (3) comprises:
• a metal mesh;
• a gas diffusion layer, pressed into the metal mesh, selected from a pyrolytic graphite sheet or a non-woven carbon fabric;
• and a catalytic ink dispersed on the gas diffusion layer, wherein the catalytic ink comprises:
• a catalyst that comprises at least one metal oxide selected from ruthenium oxide RuO2, manganese oxide MnO2, iridium oxide IrO2, nickel oxide Ni2O3 and lanthanum oxide La2O3;
• a support for the catalyst based on reduced graphene oxide;
• and an alcoholic solution;
• where each separation membrane (4) has a pore size ranging between 60 and 90 pm, where the negative electrode (5) comprises aluminum.