BATTERY CURRENT COLLECTOR, METHOD FOR PRODUCING THE SAME, AND NONAQUEOUS SECONDARY BATTERY

摘要

The invention relates to a battery current collector including a metal foil for carrying at least a positive electrode active material or a negative electrode active material. At least one side of the metal foil has a compressed base plane and non-compressed protrusions arranged at a predetermined interval, and the non-compressed protrusions are formed at the same time as formation of the base plane. The surface roughness of the base plane is different from the surface roughness of the protrusions, and the surface roughness of the base plane is preferably an arithmetic mean roughness of 0.8 μm or less.