2 2 ELECTRODEPOSITED COPPER FOIL CURRENT COLLECTORS FOR NEGATIVE ELECTRODE OF LITHIUM-ION SECONDARY BATTERIES AND LITHIUM-ION SECONDARY BATTERIES

摘要

According to the present invention, in electrodeposited copper foil applied to a negative current collector of a lithium-ion secondary battery, surface roughness of a mat surface of the electrodeposited copper foil is 50-125 μm as Rsm. Therefore, a contact force between the electrodeposited copper foil used for the negative current collector and negative active material slurry can be increased.