Electrolytic copper foil and Current collector for lithium secondary battery and Secondary battery comprising the same

摘要

The present invention relates to an electrolytic copper foil, and a current collector for a lithium secondary battery and a lithium secondary battery comprising the electrolytic copper foil. The electrolytic copper foil according to an embodiment of the present invention is an electrolytic copper foil used as a current collector for a lithium secondary battery. The half-width of a peak curve with respect to a surface (111) showed on an X-ray diffraction analysis graph obtained in a state without treating heat is 0.08 or more and 0.15 or less, wherein the graph is showed that an X-axis variable is diffraction angle, 2 theta, and an Y-axis variable is diffracted X-ray intensity.