| 摘要 |
PURPOSE:To enhance a charging and discharging characteristic by forming numerous pores, whose average particle diameter is within a limit, on the surface layer of a metal frame constituting a porous body of a three-dimentional structure which holds an electrode active material and collects a current. CONSTITUTION:Numerous pores whose average pore diameter is 5mum or less are formed in the vicinity of the surface layer of a metal frame constituting a porous body of a three-dimentional structure including mainly metal such as nickel. At the frame surface of the porous body or the portion thereof from the frame surface to the inside, there is previously provided a mixture layer made of one or two kinds or more of materials selected from main structure metal, alkali metal, alkaline earth metal and salts thereof. And then, a part or the whole of the material is eluded with an alkaline solution. |
