| 摘要 |
PURPOSE:To prevent an active material from falling off from an electrode surface, by skin pass-rolling a substrate of spongy metallic porous material and then performing heat treatment in a non-oxidation atmosphere and thereafter impregnating the substrate of spongy metallic porous material with an active material. CONSTITUTION:A substrate of spongy metallic porous material is skin pass- rolled, and then heat treatment is performed in a non-oxidation atmosphere, and thereafter this substrate of spongy metallic porous material is impregnated with an active material. The skin pass rolling is a cold-rolling in which 0.5-2% light pressure is applied for removing strained patterns in a cold-rolled steel plate after annealing and for increasing its hardness and so on. This technology is skillfully applied to the substrate of spongy metallic porous material for electrode so that a diameter of porous hole is reduced on only surface layer to obtain a mechanically hard surface layer with diffusion junction performed by heating process. Thus, the active material impregnating inside can be prevented from falling off from the electrode surface. |
