▎ 摘　　要

NOVELTY - A carbon nanotube/graphene composite film comprises graphene layer (1) and carbon nanotube (2). USE - Carbon nanotube/graphene composite film. ADVANTAGE - The film is suitable for cooling system for high heat flux areas. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of carbon nanotube/graphene composite film comprising taking graphene, adding polar solvent, stirring, adding additive, obtaining solution A, taking polymer carbon source and transition metal catalyst precursor, dissolving in polar solvent, adding additive, mixing, adding solution A and additive, mixing, filtering, drying, pumping inert gas, and sintering at 150-300 degrees C for 20-60 minutes and at 600-1200 degrees C for 30-120 minutes. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of carbon nanotube/graphene composite film. Graphene layer (1) Carbon nanotube (2)