HYDROGEN OCCLUDING ALLOY AND ELECTRODE MADE OF THE ALLOY

• Main Authors: KOMADA, N, CHRISTODOULOU, N, TAMO, Y, MATSUMOTO, M, KAKEHASHI, S
• Format: Patent
• Language: English; French; German
• Published: 26.02.1997
• Edition: 6
• Subjects: ALLOYS; BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS THEREOF; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; TREATMENT OF ALLOYS OR NON-FERROUS METALS

There is provided a hydrogen occluding alloy exhibiting high absorption and desorption speeds. A hydrogen occluding alloy comprising as an overall composition: 25 to 45 weight % Zr+Hf, wherein the Hf comprises not more than 4%, 1 to 15 weight % Ti, 10 to 20 weight % Mn, 2 to 12 weight % V, 0.6 to 5 weight % rare earth elements, and a balance Ni (of which content is not less than 25 weight %) and unavoidable impurities, and basically having a three-phase structure consisting of: a net-shaped continuous phase which is made of a Ni-Zr type alloy, a main phase (in the net-shaped continuous phase) made of a Zr-Ni-Mn based alloy, and a dispersed granular phase made of a rare earth elements-Ni type alloy distributed along the net-shaped continuous phase.