ELECTRODE MATERIAL FOR ELECTROLYTIC CAPACITOR

摘要

An electrode material for electrolytic capacitor that attains a high capacitance not hitherto realized. There is provided an electrode material for electrolytic capacitor comprising a layer of valve metal particles furnished at the surface thereof with an oxide film, the layer having a void ratio of 20 to 60% and a specific surface area of 30OE0³ to 400OE0³ cm²/cm³, 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 substratum surface, and wherein the valve metal consists of aluminum, and wherein the composition ratio of Al/O of the valve metal particle layer furnished at the surface thereof with the oxide film is in the range of 2.0 to 5.5. The electrode material realizes a high capacitance.