▎ 摘　　要

NOVELTY - Nitrogen-doped graphene/conducting metal composite cable comprises a conductive metal main body which is covered on the surface of the conductive metal the graphene doped with nitrogen layer, the nitrogen-doped graphene layer and the conductive metal body forming a coaxial structure. USE - Used as nitrogen-doped graphene/conducting metal composite cable. ADVANTAGE - The cable has less resistance to cable and high electrical conductivity compared with the existing copper cable, improves conductivity by more than 20% under the same diameter condition, and reduces quality of copper cable under the load of the same current. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing nitrogen-doped graphene/conducting metal composite cable, comprising (i) cleaning the conductive metal body to obtain a clean surface; and (ii) heating the cleaned conductive metal body to 300-1000 degrees C, introducing a carbon and a nitrogen source, growing nitrogen-doped graphene on the surface of the conductive metal body and cooling under a reducing atmosphere.