Aluminum electrode foil for electrolytic capacitor and electrolytic capacitor using the foil

摘要

An aluminum electrode foil for an electrolytic capacitor has a sponge-like etching layer formed on at least one of the surfaces thereof, and the sponge-like etching layer is reduced in a direction of thickness. The aluminum density of the reduced sponge-like etching layer @ d2' is set from 0.8 to 2.2 g/cm<3>. <IMAGE>