COPPER FOIL FOR CURRENT COLLECTOR OF LITHIUM SECONDARY BATTERY

摘要

PURPOSE: A copper foil is provided to prevent the reduction of electrode capacity and unstable movement of a lithium secondary battery since an active material is uniformly coated in both sides of the copper foil. CONSTITUTION: A copper foil for a current collector of a lithium secondary battery includes at least one nodule cluster in which nodules are gathered in case of M surface of the copper foil. An aspect ratio of the nodule cluster is 0.001-2 and a surface roughness difference of M surface and S surface is 0.5 micron or less. The surface roughness of M surface is 1.5 micron or less.