Patent ID: 8785039

Claim:
A positive electrode plate comprising: a battery-dedicated electrode foil which comprises an aluminum electrode foil in which metal aluminum is exposed, or which has on metal aluminum an aluminum oxide layer of 3 nm or less in film thickness; and a corrosion-resistant layer on a surface of the aluminum electrode foil, and being in direct contact with the metal aluminum of the aluminum electrode foil, or in contact with the aluminum oxide layer, the corrosion-resistant layer being made of a carbide of at least one substance selected from the group consisting of tungsten, tantalum, hafnium, niobium, molybdenum, and vanadium, wherein a thickness of the corrosion-resistant layer is 3 nm to 90 nm; and a positive electrode active material layer that contains a positive electrode active material and that is supported on a main surface of the battery-dedicated electrode foil.