▎ 摘　　要

NOVELTY - Preparation of graphene oxide silicon-carbon composite anode material includes ball milling powder, drying, sieving, wet mixing with ethanol liquid medium, adding 95-98% acid solution, pickling, mixing, and oxidizing; adding 50-70% nitric acid solution as oxidant to carry out oxidation intercalation reaction to obtain oxidized intercalation substance, washing with water, adding to graphite expansion furnace under inert gas atmosphere, heating, discharging, and collecting expanded graphite material; putting to Acheson furnace to carry out graphitization purification, adding to impregnation tank, adding coating material medium-temperature asphalt, soaking, extruding, placing extrudate to closed furnace, carbonizing, insulating, and naturally cooling; and adding to graphitization furnace to carry out graphitization purification, and subjecting to laser pulse treatment. USE - The method is for preparation of graphene oxide silicon-carbon composite anode material. ADVANTAGE - The anode material has enhanced electrical conductivity, thermal conductivity and self-lubricating properties. DETAILED DESCRIPTION - Preparation of graphene oxide silicon-carbon composite anode material comprises: (A) ball milling powder at speed of 400-800 revolutions/minute for 15-30 hours, drying to 50-100 degrees C, sieving, wet mixing with ethanol liquid medium, adding 95-98% acid solution comprising hydrochloric acid solution or sulfuric acid solution at mass ratio of 1:3-5, pickling, mixing for 20-30 minutes, and oxidizing at room temperature; (B) adding 50-70% nitric acid solution as oxidant at mass ratio of 1:3 1:8 to carry out oxidation intercalation reaction at less than 70 degrees C for 70-100 minutes to obtain oxidized intercalation substance, washing with water until pH is 6-7, adding to graphite expansion furnace under inert gas atmosphere comprising nitrogen and argon mixture at volume ratio of 95:5-90:10, heating from room temperature to 700-1000 degrees C, discharging when temperature of discharge port is 50 degrees C, and collecting expanded graphite material; (C) putting to Acheson furnace to carry out graphitization purification at 2500-2800 degrees C for 192-240 hours, adding to impregnation tank, adding coating material medium-temperature asphalt, soaking at 250-650 degrees C and at 7-12 KPa for 8-15 hours, extruding through screw extruder, placing extrudate to closed furnace, carbonizing to 120-370 degrees C at rate of 2.5 degrees C/hour for 100 hours under nitrogen or argon atmosphere, increasing temperature to 370-570 degrees C at rate of 3.5 degrees C/hour for 57 hours, increasing temperature to 570-870 degrees C at rate of 4 degrees C/hour for 75 hours, increasing temperature to 870-1200 degrees C at rate of 3 degrees C/hour for 110 hours, insulating to room temperature for 24 hours, and naturally cooling to room temperature; and (D) adding to graphitization furnace to carry out graphitization purification at 2800-32000 degrees C for 450-500 hours, and subjecting to laser pulse treatment to obtain required particle size.