COPPER FOIL FREE FROM GENERATION OF WRINKLE, ELECTRODE COMPRISNG THE SAME, SECONDARY BATTERY COMPRISING THE SAME AND METHOD FOR MANUFACTURING THE SAME

摘要

An embodiment of the present invention, a copper layer having a matte surface and a shiny surface; And a rust prevention film disposed on the copper layer, and has a residual stress of 0.5 to 25 Mpa based on an absolute value, and the copper layer includes: copper; And carbon (C); In the copper layer, the content of the carbon (C) is 2 to 20 ppm, and the copper layer is a (111) plane containing crystalline particles, (200 ) Plane, (220) plane, and (311) plane, among the sum of diffraction intensity of the (111) plane, the (200) plane, the (220) plane, and the (311) plane, The ratio occupied by the diffraction intensity is 10 to 40%, and the crystalline particles of the (220) plane at room temperature provide a copper foil having an average particle size of 70 to 120 nm.