Electrolytic copper foil for lithium secondary battery and Lithium secondary battery comprising the same

摘要

An electrolytic copper foil for a lithium secondary battery according to an embodiment of the present invention is an electrolytic copper foil for a lithium secondary battery applied as a negative electrode current collector of a lithium secondary battery, and an annealing temperature value and a variable y of a lithium secondary battery electrolytic copper foil corresponding to the variable x on the xy two-dimensional graph When the correlation between the elongation increase ratio value of the electrolytic copper foil for lithium secondary battery corresponding to y = ax + b (100 ≤ x ≤ 200) is expressed, the a value corresponds to a range of 0.0009 to 0.0610.