▎ 摘　　要

NOVELTY - The preparation method of composite nanocarbon material involves adding catalyst precursor to organic carbon source, adding graphene oxide to dispersant and ultrasonically crushing, mixing carbon nanotube precursor (A) and graphene oxide dispersion liquid (B) in reaction tower by different paths, pyrolyzing organic carbon source to form carbon atoms and reducing atmosphere, subjecting catalyst precursor to high-temperature pyrolysis and gas phase reduction to form catalyst, adding graphene and nanocarbon to reaction tower, then dispersing, forming and dispersing. USE - The method is useful for preparing composite nanocarbon material (claimed). ADVANTAGE - The method enables simple preparation of composite nanocarbon material with excellent electric conductivity, thermal conductivity, mechanical properties and stability. DETAILED DESCRIPTION - The preparation method of composite nanocarbon material involves adding catalyst precursor to organic carbon source to prepare carbon nanotube precursor (A), adding graphene oxide to dispersant and ultrasonically crushing to prepare graphene oxide dispersion liquid (B), mixing carbon nanotube precursor (A) and graphene oxide dispersion liquid (B) in reaction tower by different paths, pyrolyzing organic carbon source to form carbon atoms and reducing atmosphere, subjecting catalyst precursor to high-temperature pyrolysis and gas phase reduction to form catalyst, adding graphene and nanocarbon to reaction tower, then dispersing, naturally forming and uniformly dispersing.