▎ 摘　　要

NOVELTY - The preparation method of graphene/carbon black composite particles involves: (1) adding graphene oxide to solvent to obtain graphene oxide solution, then placing in ultrasonic system to carry out ultrasonic dispersion to obtain enriched graphene solution, adding carbon black and graphene oxide to solvent, then subjecting to ultrasonic dispersion to obtain graphene oxide/carbon black solution, controlling the temperature below 50 degrees C, adding dispersant and carbon black to carbon black solution, and mixing solution so that the dispersant is completely dissolved. USE - The method is useful for preparing graphene/carbon black composite particles (claimed). ADVANTAGE - The method prepares graphene/carbon black composite particles with large porosity and specific surface area, and excellent wear resistance and mechanical performance. DETAILED DESCRIPTION - The preparation method of graphene/carbon black composite particles involves: (1) adding graphene oxide to solvent to obtain graphene oxide solution, then placing in ultrasonic system to carry out ultrasonic dispersion using frequency of 100-4000 HZ at a temperature of 0-95 degrees C for 0.1-5 hours to obtain enriched graphene solution having concentration of 1-20 g/ml, adding carbon black and graphene oxide in mass ratio (1-50):1 to solvent, then subjecting to ultrasonic dispersion using frequency of 100-5000 W for 0.1-4 hours to obtain graphene oxide/carbon black solution, controlling the temperature below 50 degrees C, adding dispersant and carbon black in mass ratio (1-20):1 to carbon black solution, and mixing the solution at room temperature for 1-180 minutes so that the dispersant is completely dissolved to obtain uniformly dispersed carbon black solution; (2) adding reducing agent and graphene oxide in mass ratio (0.1-30):1 to graphene/carbon black solution, mixing for 1-180 minutes, then heating the mixed solution at a constant temperature of 10-80 degrees C, reacting for 0.5-36 hours to obtain graphene/carbon black gel, repeatedly washing 1-10 times above-obtained graphene/carbon black gel with ethanol, repeatedly washing graphene/carbon black liquid gel with ethanol, and replacing liquid in gel by using same solvent for dissolving graphene oxide; and (3) drying graphene/carbon black liquid gel in drying facility, and performing vacuum drying or freeze-drying treatment to obtain product.