| 摘要 |
PURPOSE:To obtain a hydrogen storage alloy powder having oxidation resistance and easy to handle in the air with a simple operation by dipping a hydrogen storage alloy in hypophosphorous acid. CONSTITUTION:The powders of the commercially available misch metal, nickel, cobalt and aluminum are weighed and mixed in a specified composition ratio, and the mixture is heated and arc-melted to obtain a hydrogen storage alloy ingot. The ingot is dipped in hypophosphorous acid (about 30% concn.) for about 2hr, and the ingot is expanded and pulverized while generating hydrogen gas. The powder is washed with water, the aq. hypophosphorous acid is filtered off, and the powder is dried in the air at about 60 deg.C for about 2hr. Consequently, a hydrogen storage alloy powder having high activity and capable of rapidly initially activated is obtained. |
