Aluminum base for current collector, current collector, positive electrode, negative electrode, and secondary battery

Abstract

The purpose of this invention is to provide an aluminum base for a current collector, which enables the production of a secondary battery having excellent cycle properties; and a current collector, a positive electrode, a negative electrode and a secondary battery, each of which is produced using the aluminum base. The aluminum base for a current collector has a surface in which at least two structures selected from the group consisting of a large-wave structure having an average opening size of more than 5 μm but up to 100 μm, a medium-wave structure having an average opening size of more than 0.5 μm but up to 5 μm, and a small-wave structure having an average opening size of more than 0.01 μm but up to 0.5 μm are superimposed on one another, wherein a maximum peak-to-valley height Pt of a profile curve of the surface is up to 10 μm.

Dependencies are inferred from the claim text.