| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive method for producing hydrogen storage alloy powder suitable for a nickel-hydrogen storage battery of high capacity having excellent high rate discharging characteristics and having a long charging and discharging cycle life. SOLUTION: In this method for producing hydrogen storage alloy powder, a hydrognen storage alloy having a CaCu5 type crystal structure in the main phase and containing Mg or Ca is heat-treated in an inert atmosphere or in a vacuum, is thereafter cooled and is then pulverized, rare earth oxide or hydroxide is added thereto, the same is subjected to wet or dry blending, and after that, further, heat treatment is performed in an inert atmosphere or in a vacuum. Moreover, a hydrogen storage alloy electrode for a nickel-hydrogen storage battery using the hydrogen storage alloy powder obtained by the above production method is provided. |
