MANUFACTURE OF HYDROGEN STORAGE ALLOY FOR BATTERY

PROBLEM TO BE SOLVED: To restrict lower cycle service life characteristics or shelf life as an alkaline storage battery by improving a hydrogen storage alloy of Mm-Ni and AB5 type even when the cobalt content in the alloy is small. SOLUTION: An alloy in which cobalt atom% in a hydrogen storage alloy...

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Bibliographic Details
Main Authors MORIWAKI YOSHIO, KAIYA HIDEO, IZUMI YOICHI, YAMAMURA KOJI
Format Patent
LanguageEnglish
Published 19.09.1997
Edition6
Subjects
ALLOYS
BASIC ELECTRIC ELEMENTS
CASTING
CHEMISTRY
ELECTRICITY
FERROUS OR NON-FERROUS ALLOYS
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
METALLURGY
PERFORMING OPERATIONS
POWDER METALLURGY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
TRANSPORTING
TREATMENT OF ALLOYS OR NON-FERROUS METALS
WORKING METALLIC POWDER
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Summary:PROBLEM TO BE SOLVED: To restrict lower cycle service life characteristics or shelf life as an alkaline storage battery by improving a hydrogen storage alloy of Mm-Ni and AB5 type even when the cobalt content in the alloy is small. SOLUTION: An alloy in which cobalt atom% in a hydrogen storage alloy is 15% or less is 10 to 100μm in the average particle size, at least one type to be selected from among cobalt metal, cobalt oxide, cobalt hydroxide, and cobalt salt is added to this alloy and is applied and agitated in the alkaline solution at the added specific gravity of 1.1 or more and at a temperature of 80 to 130 deg.C, and the cobalt concentration is higher than that of the center of the alloy particle.
Bibliography:Application Number: JP19960051264