▎ 摘　　要

NOVELTY - The radiating fin comprises a first graphene powder and copper graphene composite powder. The copper-graphene composite powder is mixed in the first graphene powder. The copper-graphene composite powder is composed of graphene-copper powder and graphene powder. The copper-graphene composite powder is spherical shaped. The mass ratio of the first graphene powder and the copper-graphene composite powder is 39-52:8-15. USE - Sheet-shaped radiating fin for an electronic device (claimed) i.e. folding mobile phone. ADVANTAGE - The radiating performance and hydrophobic performance of the electronic device are improved. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a preparation method of radiating fin; and (2) an electronic device. DESCRIPTION OF DRAWING(S) - The drawing shows a flow chart for preparing the radiating fin. (Drawing includes non-English language text) Step for providing the original graphene material and crushing the original graphene material to obtain the first graphene powder and the second graphene powder (S1) Step for preparing graphene-copper powder (S2) Step for compositing the graphene-copper powder and the second graphene powder in a certain proportion to form copper-graphene composite powder (S3) Step for vibrating and mixing the copper-graphene composite powder with the first graphene powder to obtain mixed powder (S4) Step for preparing heat sink by printing the mixed powder through three-dimensional printing technology (S5)