▎ 摘　　要

NOVELTY - Preparing graphene/silicon-carbon composite material comprises e.g. (i) dissolving soluble organics in 1-10 mg/ml graphene oxide dispersion liquid, ultrasonically dispersing to form a suspension, adding to three-necked flask, placing on an ultrasonic atomizer, carrying out ultrasonic atomization; and (ii) sealing the one mouth of the resulting three-necked flask with a rubber plug, one port is connected to inert gas, the other port is connected to a tube furnace, and ultrasonically atomized mixed mist beads passing through tube under protection of inert gas, and performing vapor deposition. USE - The method is useful for preparing graphene/silicon-carbon composite material. ADVANTAGE - The composite material has the characteristics of large reversible capacity, capacity design, cycle performance and high current discharge capability, and high tap density. DETAILED DESCRIPTION - Preparing graphene/silicon-carbon composite material comprises (i) dissolving soluble organics in 1-10 mg/ml graphene oxide dispersion liquid, ultrasonically dispersing to form a suspension, adding to three-necked flask, placing on an ultrasonic atomizer, carrying out ultrasonic atomization at a frequency of 20000 Hz for 30 minutes to form a mixed mist; (ii) sealing the one mouth of the resulting three-necked flask with a rubber plug, one port is connected to inert gas, the other port is connected to a tube furnace, and ultrasonically atomized mixed mist beads passing through the tube under the protection of inert gas, performing the vapor deposition in an oven, which is performing on a copper foil substrate that is horizontally placed horizontally in a tube furnace, and then closing the ultrasonic atomizer after depositing at 400 degrees C for 1 hour; and (iii) heating the tube furnace to 800 degrees C at 5 degrees C/minute, and then opening the rubber flask of three-necked flask, adding the mixed solution of benzene and trimethylchlorosilane at a mass concentration of 50% and 50%, respectively, and then plugging the rubber stopper to open the ultrasonic atomization, the atomizer continues to perform ultrasonic atomization at a frequency of 20000 Hz, completely passing the mixed mist bead into the tube furnace, closing the ultrasonic atomizer after the mixed mist beads vapor-deposited in the tube furnace, and then taking out and cooling to room temperature for 6 hours to obtain the graphene/silica-carbon composite materials on the surface of copper foil; and in the step (iii), maintaining the inert gas flow in the three-necked flask at 500 ml/minute.