HIGH-STRENGTH, LOW-WARPING ELECTROLYTIC COPPER FOIL AND METHOD FOR PRODUCING SAME

摘要

This electrolytic copper foil is characterized by the tensile strength in an ordinary state (hereinafter referred to as "ordinary state tensile strength") being 45-55 kgf/mm2, and the average amount of lift of the four 100 mm corners being no greater than 2 mm, and the tensile strength after heating for 60 minutes at 180°C (hereinafter referred to as "post-heating tensile strength") is at least 85% of the ordinary state tensile strength. The problem addressed by the present invention is to provide an electrolytic copper foil that has a high ordinary state tensile strength and post-heating tensile strength and a low amount of warping, particularly an electrolytic copper foil useful as a secondary battery anode collector.