| 摘要 |
PURPOSE:To manufacture a hydrogen storage alloy electrode whose initial characteristic is improved while maintaining an excellent cycle characteristic by covering a part of the hydrogen storage alloy surface with alkali - soluble metal, and covering the other exposure part with alkali - insoluble metal. CONSTITUTION:In a hydrogen storage alloy electrode containing hydrogen storage alloy 21 to store or release hydrogen reversibly, a part of the alloy 21 powder surface is covered with alkali soluble metal such as Al or the oxide 22. This covering can be carried out, for example, by a mechanical alloying treatement. Next, the other exposure part of the alloy 21 is covered with alkali - insoluble metal 23 such as Ni by an electroless plating and so on. Since an alkali treatment is carried out on this covered alloy 21, the alkali - soluble metal metal 22 is dissolved, and a reacted surface is formed. Since alloy 21 powder obtained in this way is molded in an electrode, an initial characteristic can be improved while maintaining a conventional cycle characteristic. |
