Abstract: A button-type air cell which comprises:an air cathode prepared by adding a binder to carbon powders mixed with metal chelates;viscous gelled electrolyte set in contact with said air cathode;and wherein the metal chelates include metal phthalocyanines and metal porphyrins; and the metal atom of the metal chelates is symmetrically surrounded by four nitrogen atoms, said metal being cobalt, iron, nickel, manganese or copper.

Abstract: A zinc-silver oxide dry cell comprises a zinc anode, a silver oxide cathode, an immobilized body interposed between the anode and the cathode, and a metallic silver layer formed at least on the anode side surface of the cathode by reduction of silver oxide. Reduction of the siver oxide to form the metallic cathode layer on the cathode surface is effected by causing a reducing agent to contact with the cathode surface or by subjecting the cathode surface to a heat treatment, electrolysis or a mechanical force.

Abstract: A zinc-silver oxide dry cell comprises a zinc anode, a silver oxide cathode, an immobilized body interposed between the anode and the cathode, and a metallic silver layer formed at least on the surface of the anode side of the cathode in which the metallic silver layer is formed through a reduction reaction resulting from a light exposed to the surface of the cathode. The cathode of the dry cell requires no graphite for an electroconductive ingredient, making it possible to increase an amount of silver oxide which is active ingredient for the cathode and to consequently increase a discharge capacity correspondingly.