Electrolytic copper foil for graphene and method for producing the copper foil
The present disclosure relates to an electrolytic copper foil for graphene and a method for producing the copper foil. More particularly, the present disclosure relates to an electrolytic copper foil for graphene and a method for producing the copper foil, which may facilitate formation of graphene by blocking surface deformation during the electrolytic copper foil formation. In accordance with the present disclosure, the Rz roughness of the S-face of the electrolytic copper foil after 1 hour treatment at 200° C. in the synthesis of graphene on the electrolytic copper foil is defined based on the Relationship 1 below. This may also minimize the deformation of the surface of the electrolytic copper foil at high temperatures: 0.05≤( Rz roughness of M -face of electrolytic copper foil/ Rz roughness of S -face after treatment at 200° C. for 1 hour)/thickness of electrolytic copper foil≤0.2. Relationship 1:
1. An electrolytic copper foil for synthesis of a single-layer graphene thin film, wherein a Rz roughness of an S-face of the electrolytic copper foil after thermal-treatment is define based on a following Relationship 1:
0.05≤( Rz roughness of an M -face of the electrolytic copper foil/ Rz roughness of the S -face after the thermal-treatment)/thickness of the electrolytic copper foil≤0.2, Relationship 1:
wherein the thermal treatment is carried out at a temperature of 180 to 220 degrees Celsius for 50 to 80 minutes,
wherein a resistance of the single-layer graphene thin film that is synthesized on the electrolytic copper foil is 300 Ω/square or smaller; and
wherein the Rz roughness of the S-face of the electrolytic copper foil is 1.2-1.4 μm after a thermal-treatment performed at 200° C. for 1 hour in a synthesis of graphene on the electrolytic copper foil.
2. The electrolytic copper foil of claim 1 , wherein in the Relationship 1, the Rz roughness of the M-face of the electrolytic copper foil is 0.3 to 3.0 μm.
3. The electrolytic copper foil of claim 1 , wherein in the Relationship 1, the thickness of the electrolytic copper foil is 4 to 70 μm.