ELECTRODE MATERIAL FOR ELECTROLYTIC CAPACITOR

摘要

There is provided an electrode material for electrolytic capacitor that attains an unprecedentedly high capacitance. The electrode material for electrolytic capacitor comprises a layer of valve metal particles furnished on the surface thereof with an oxide film, the layer having a porosity of 20 to 60% and a specific surface area of 30 x 10 3 to 400 x 10 3 cm 2 /cm 3 , wherein the valve metal particles are mixed together, with the particle diameters exhibiting a given distribution at least within the range of 0.005 to 0.1 µm, and form a base material surface, and wherein the valve metal consists of aluminum, and wherein the composition ratio of Al/O of the layer of valve metal particles furnished on the surface thereof with the oxide film is within the range of 2.0 to 5.5. The electrode material thus realizes high capacitance.