HIGHLY DURABLE OVERVOLTAGE CATHOD WITH LOW HYDROGEN LEVEL, AND PROCESS FOR ITS PRODUCTION

摘要

PCT No. PCT/JP85/00183 Sec. 371 Date Feb. 4, 1986 Sec. 102(e) Date Feb. 4, 1986 PCT Filed Apr. 10, 1985 PCT Pub. No. WO86/06107 PCT Pub. Date Oct. 23, 1986.A highly durable cathode of a low hydrogen overvoltage with particles of an electrode active metal being stuck on the core material of the electrode, wherein a part or all of the electrode active metal particles is a hydrogen absorbing metal which is capable of electro-chemically absorbing and desorbing hydrogen. A method for manufacturing a highly durable cathode of a low hydrogen overvoltage, characterized in that an electrode core is immersed in a plating bath with particles of a hydrogen absorbing metal capable of electro-chemically absorbing and desorbing hydrogen being dispersed as at least one part of particles of an electrode active metal, and that the electrode active metal particles are electrolytically co-deposited on the electrode core together with a plating metal by the composite plating method. A method for manufacturing a highly durable cathode of a low hydrogen overvoltage, which comprises fabricating a sheet containing therein a hydrogen absorbing metal capable of electro-chemically absorbing and desorbing hydrogen, or electrode active metal particles composed of the hydrogen absorbing metal and another metal having a low hydrogen overvoltage, in such a manner that at least one part thereof may be exposed on at least one surface side of the sheet; and fixing the sheet to an electrode core on the surface opposite to the surface where the particles are exposed.