| 摘要 |
PROBLEM TO BE SOLVED: To suppress attenuation of a capacity with the lapse of cycles and improve the rate characteristic by sticking a conductive metal and carbon powder, in a uniform and highly-dispersed manner, on surfaces of a hydrogen storage alloy, whereby a part of the metal forms a film on the surfaces of the hydrogen storage alloy, and uniformly mixes the hydrogen storage alloy, the metal which is not stuck on the surfaces, and the carbon powder. SOLUTION: A hydrogen storage alloy powder and a conductive metal are mixed for one hour/or more, without including other solid matters and without pulverizing effect, and a powder so obtained is mixed with a pulverizing effect in an inert gas atmosphere. The mixing time is set not less than one hour and not more than 10 hours per 100 g of gross powder weight. Next, a powder so obtained and acetylene black are put into (a container) in this order, so as to level off at a height from the bottom part without mixing these powders, then mixed until the height from the bottom part of the mixed powder becomes 60% or less, as compared with that just after the powders are put in, and a powder so obtained is mixed with a binding material and then molded. |
