| 摘要 |
PURPOSE:To provide an air electrode with good oxygen gas selective permeability and no permeability of water vapor and carbon dioxide in the air by bonding a complex film obtained by gelling sol solution of metal oxide in contact with a porous film, on the air side surface of a porous electrode main body having electrochemically reducing ability to oxygen gas and current collecting function. CONSTITUTION:A sol solution such as SnO2, ZnO, Al2O3 which is spreaded or impregnated in a porous film such as porous polypropylene, porous cellulose ester, or porous polycarbonate is gelled by removing and drying dispersion medium in the atmosphere and it is complexed with a porous film to form a complex film. The complex film is placed on the air side surface of an air electrode main body comprising silver filter, Raney nickel, a sinter of silver or nickel, metal foams, a compressed body of nickel plated stainless steel fine wires, or gold, palladium, or silver plated those compressed bodies, and they are bonded by a roll, press, or heating. A battery having this air electrode has good high rate discharge performance and leakage resistance. |
