METHOD FOR PRODUCING AN ELECTROLYTIC COPPER FOIL

A method for producing an electrolytic copper foil is provided. The method includes preparing a copper electrolytic solution including at least one addition agent and performing an electroplating step including: electrolyzing the copper electrolytic solution to form a raw foil layer. The raw foil layer has a first surface and a second surface opposite to the first surface. In the X-ray diffraction spectrum of the first surface, a ratio of the diffraction peak intensity I(200) of the (200) crystal face of the first surface relative to the diffraction peak intensity I(111) of the (111) crystal face of the first surface is between 0.5 and 2.0. A ratio of the diffraction peak intensity I(200) of the (200) crystal face of the second surface relative to the diffraction peak intensity I(111) of the (111) crystal face of the second surface is between 0.5 and 2.0.