| 摘要 |
PURPOSE:To improve reaction activity of the surface of a hydrogen storage alloy, maintain high discharging capacity for a long duration, and improve the durability and storage property of the alloy by mixing powder of the hydrogen storage alloy and powder of another metal by a mill in sealed condition. CONSTITUTION:A powder mixed by a mill is prepared by pulverizing and mixing a mixed powder of a hydrogen storage alloy powder and a powder of at least one of other metals by a mill apparatus in sealed condition. The mixed-by-mill powder is directly press-formed on a net or a porous plate made of a metal. In this case, a viscosity increasing agent is added to the mixed-by-mill powder in a prescribed ratio and the mixed-by-mill powder is press-formed on a conductive substrate and then heating treatment at highest 1100 deg.C is carried out. Consequently, the surface of the hydrogen absorbing alloy is coated with other metals without being oxidized. As a result, with no decrease of the reaction activity of the surface of the hydrogen storage alloy, the high discharging capacity is maintained for a long duration and at the same time hydrogen absorbing alloy electrodes with high durability and excellent storage property are easily obtained. |
