▎ 摘　　要

NOVELTY - A silicon carbon negative electrode comprises 15-25 %mass graphene, 20-30 %mass carbon nanotubes, 15-25 %mass silicon particles, 10-20 %mass silicon dioxide, 2-4 %mass tetrahydrofuran, 10-20 %mass asphalt, 1-3 %mass organic solvent, 5-10 %mass polystyrene, 0.5-1 %mass conductive agent, and 0.5-1 %mass adhesive. USE - Silicon carbon negative electrode. ADVANTAGE - The silicon carbon negative electrode is safe and reliable. The graphene, carbon nanotubes and silicon particles as raw materials and asphalt for dissolving and coating can greatly eliminate the defects and impurities on the surface of the silicon carbon negative electrode, and greatly improve the electrochemical performance of graphite. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for manufacturing the silicon carbon negative electrode, which involves: (1) weighing the above-mentioned components according to the mass percentage; (2) mixing and processing by (2a) cleaning a reactor, adding half of tetrahydrofuran and slowly stirring for 1-2 hours, (2b) mixing tetrahydrofuran and asphalt, slowly stirring and heating at 30-40 degrees C until the asphalt melts into an asphalt solution, (2c) maintaining the temperature of the material and slowly pouring the silicon dioxide into the reactor while stirring, and (2d) closing the reactor, introducing an inert gas, lowering the temperature of material to 20-30 degrees C, reacting for 1-2 hours, and pouring the obtained mixture into a storage barrel for storing; (3) producing a silicon powder by (3a) cleaning the reactor, adding the organic solvent to the reactor and slowly stirring for 20 minutes, (3b) manually selecting silicon particles, soaking in water for 10 minutes, removing silicon particles, again soaking in the organic solvent inside the reactor, and slowly and manually turning and (3c) removing the silicon particles and placing in an ultrasonic machine for ultrasonic cleaning; (4) coating a silicon carbon by (4a) pouring the mixture from step (2d) into the silicon powder inside the reactor in step (3c), mixing and uniformly stirring to make it evenly dispersed, (4b) adding the adhesive to the reactor, heating at 30-40 degrees C and slowly stirring until the mixture is uniform, (4c) heat preserving and adding polystyrene and carbon nanotubes, and introducing a protective gas to react for 1-2 hours and (4d) after the reaction is completed, adding the conductive agent, slowly stirring for 20 minutes, adding graphene, and using a centrifuge to perform centrifugal stirring for 1-2 hours to obtain the silicon-carbon coating mixture; (5) sintering and drying by (5a) putting the silicon-carbon coating mixture obtained in step (4) into water to soak for 20 minutes and slowly stirring, (5b) taking out the soaked silicon-carbon coating mixture, putting into a calciner for calcination, and adjusting the temperature to 800-900 degrees C and (5c) passing the formed silicon-carbon coating mixture into the protective gas for cooling until it is cooled to room temperature to obtain a silicon-carbon negative electrode, taking out and storing in the storage barrel; and (6) checking damage and scratches on the surface of the silicon carbon negative electrode obtained in step (5), then plastic packaging, boxing and storing.