ROLLED COPPER FOIL FOR COLLECTOR OF SECONDARY BATTERY AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a rolled copper foil for a collector of a secondary battery, which has reduced anisotropy of Young's modulus and can improve electrical properties of the secondary battery.SOLUTION: A rolled copper foil for a collector of a secondary battery includes at least one kind of Cr, Zr and Ti in an amount of 0.01-0.6 mass% in total, with the remainder comprising copper and inevitable impurities. The rolled copper foil is characterized in that the area ratio of an area, where a crystal plane deviating by 15° or less from the (111) plane is oriented in the direction perpendicular to the rolling direction, is ≤45%.