Electrolytic copper foil, method for producing same, and high-capacity Li secondary battery negative electrode including same

An electrolytic copper foil having a first surface and a second surface, the electrolytic copper foil comprising:

• a first protective layer at the first surface;
• a second protective layer at the second surface;
• and
• a copper film disposed between the first and second protective layers, wherein
• a binding coefficient of the electrolytic copper foil at the first surface or the second surface, defined as Mathematical Expression 1 below, is 1.5 to 9.4,
• (Mathematical Expression 1)
• Binding coefficient=Rp/μm+ peak density/30+ amount of attachment of Cr/(mg/m2)
• (wherein the Rp (μm) is a peak height measured according to JIS B 0601 (2001) standard, wherein the peak density is a number of peaks per unit length of 4 mm, wherein the peak density is measured according to ASME B46.1 (2009) standard with a peak count level of ±0.5 μm and wherein the amount of attachment of Cr (mg/m2) is measured by dissolving the first surface or the second surface of the electrolytic copper foil (110) with a nitric acid solution to obtain a dissolved solution, diluting the dissolved solution with water to obtain a diluted solution, and analyzing the diluted solution using an atomic absorption spectrometer).