▎ 摘　　要

NOVELTY - Preparation of lithium battery graphite alkenyl composite cathode material involves preparing graphene oxide, placing in 250 mL reaction bottle, adding proper concentrated sulfuric acid, stirring 2 g graphite powder and 1 g solid mixture of sodium nitrate, adding 6 g potassium permanganate, controlling reaction temperature at 20 degrees C, stirring, reacting, heating at 35 degrees C, stirring for 30 minutes, adding deionized water, stirring for 20 minutes, adding proper hydrogen peroxide, filtering, washing deionized water, and drying filter cake at 60 degrees C to obtain graphene oxide; taking graphite powder silver powder and carbon nanotube at weight ratio of 3-4:2-3:8-10, mixing, putting into ball mill, grinding, filling nitrogen as protective gas, ball milling, heating to 700-900 degrees C, circulating for 30-40 minutes, milling for 10-15 hours, and obtaining mixed fines; and taking out, carrying ultrasonic dispersion, mixing, keeping water bath temperature at 80-90 degrees C for 6-8 hours, and taking out. USE - Method for preparing lithium battery graphite alkenyl composite cathode material. ADVANTAGE - The method has simple process, low manufacturing cost, and high competitive strength. DETAILED DESCRIPTION - Preparation of lithium battery graphite alkenyl composite cathode material comprises preparing graphene oxide, placing in 250 mL reaction bottle, adding proper concentrated sulfuric acid, stirring 2 g graphite powder and 1 g solid mixture of sodium nitrate, adding 6 g potassium permanganate, controlling reaction temperature at 20 degrees C, stirring, reacting, heating at 35 degrees C, stirring for 30 minutes, adding deionized water, stirring for 20 minutes, adding proper hydrogen peroxide, filtering, washing deionized water, and drying filter cake at 60 degrees C to obtain graphene oxide; taking graphite powder silver powder and carbon nanotube at weight ratio of 3-4:2-3:8-10, mixing, putting into ball mill, grinding, filling nitrogen as protective gas, ball milling, heating to 700-900 degrees C, circulating for 30-40 minutes, milling for 10-15 hours, and obtaining mixed fines; taking out, carrying ultrasonic dispersion, mixing, keeping water bath temperature at 80-90 degrees C for 6-8 hours, taking out, cleaning distilled water, freeze-drying, putting into heating furnace, heating to 150-200 degrees C for 3-4 hours, filling argon gas as protective gas, and obtaining graphene oxide composite material; mixing polyvinylidene fluoride and 4-methyl phenyl boronic acid at weight ratio of 5-8:10-12, heating to 200-240 degrees C, putting into stirrer, and stirring for 4-6 hours; putting into pressure machine, and molding to obtain blank; and heating to 200-240 degrees C, drying for 8-10 hours, and obtaining lithium battery graphite alkenyl composite cathode material.