Metallic porous body and method of manufacturing the same and battery current collector having the same

A metallic porous body that is free from clogging in the filling process of an active material, that allows the active material to fill the body uniformly even to the deep inside, and that thereby enables a secondary battery to combine large battery capacity and a high output; a method of manufacturing the metallic porous body; and a current collector having the metallic porous body. The metallic porous body is composed of a metallic framework having a three-dimensional network with a continuous-pore structure formed by linking substantially polyhedral cells. The substantially polyhedral cells have an average cell diameter of 200 to 300 µ m and an average window diameter of 100 to 200 µm. The metallic porous body can be obtained by the following method, for instance: First, a plastic porous body is provided that has an average cell diameter of 200 to 300 µm and an average window diameter of 100 to 200 µm. Second, a conductive layer is formed on the surface of the framework of the plastic porous body to produce a conductive porous body having a resistivity of 1 k©·cm or less. Finally, a continuous metalplated layer is formed on the surface of the conductive layer by electroplating, with the conductive porous body serving as the cathode. The above-mentioned current collector is provided by filling an active material into the pores of the metallic porous body.