▎ 摘　　要

NOVELTY - Graphene high-energy lithium battery composite anode paste comprises active material, dispersant, binder, conductive agent and solvent, the active material is composed of 10-20 pts. wt. modified lithium iron phosphate, 5-8 pts. wt. lithium cobalt oxide, 6-9 pts. wt. nickel acid lithium, the dispersant is composed of 3-7 pts. wt. sodium polyacrylate, 2-4 pts. wt. fatty alcoholpolyoxyethylene ether, 0.5-1.5 pts. wt. sodium lignosulfonate, the adhesive is composed of 1-2 pts. wt. gelatine, 3-5 pts. wt. modified polyacrylate. USE - Used as graphene high-energy lithium battery composite anode paste. ADVANTAGE - The paste solves the problem of anode slurry resulting in reduced lithium battery energy storage, poor cycle performance and stability, improves the discharge specific capacity, has anti-attenuation performance enhancement, high cycle life and high capacity and stability. DETAILED DESCRIPTION - Graphene high-energy lithium battery composite anode paste comprises active material, dispersant, binder, conductive agent and solvent, the active material is composed of 10-20 pts. wt. modified lithium iron phosphate, 5-8 pts. wt. lithium cobalt oxide, 6-9 pts. wt. nickel acid lithium, the dispersant is composed of 3-7 pts. wt. sodium polyacrylate, 2-4 pts. wt. fatty alcoholpolyoxyethylene ether, 0.5-1.5 pts. wt. sodium lignosulfonate, the adhesive is composed of 1-2 pts. wt. gelatine, 3-5 pts. wt. modified polyacrylate, the conductive agent is composed of 0.5-1.2 pts. wt. cobalt disulfide, 10-15 pts. wt. graphite, 2.5-4 pts. wt. nano carbon fiber, 2.5-3.5 pts. wt. acetylene black, 20-30 pts. wt. butyrolactone, the solvent is distilled water, the preparation of modified lithium iron phosphate includes adding hydrated lithium hydroxide, hydrated iron oxalate, copper acetate, tetra-hydrate magnesium acetate, tetrabutyl titanate, active carbon with ratio of 1:2:1:3:1:1, mixing, adding anhydrous ethanol of 0.8 times the total weight of the mixture, adding into high energy ball mill and ball milling for 5 hours, grinding by argon gas to protect, transferring 400 degrees C under the protection of nitrogen, sintering for 3 hours, adding in quartz glass reactor of the microwave device, starting the microwave generator, maintaining microwave power at 600-700w for 40-60 minutes to obtain the modified lithium iron phosphate. The modified polyacrylate is prepared under the protection of nitrogen, adding polyacrylate with nano-silane, ethanol into reaction container with weight ratio of 1:1:3, heating at 60 degrees C and reacting for 10 hours, washing until supernatant is colorless by normal hexane, reducing the temperature to 50 degrees C, adding 0.7 times of polyacrylate N-dopamine and uniformly stirring, reacting for 10 hours at room temperature, neutralizing by ammonia solution to pH to 7-8 to obtain modified polyacrylate. An INDEPENDENT CLAIM is also included for preparing graphene high-energy lithium battery composite anode paste comprising adding active material, modified lithium cobaltate, lithium iron phosphate, lithium nickel, mixing, adding into the mill for 8-10 hours to obtain the active material, ball milling at speed of 500-600 rotations/minutes, dispersing agent by the fatty alcohol polyoxyethylene ether and sodium lignosulfonate into the agate tank, adding 3-5 of agate ball, on the planetary ball mill at a rotating speed frequency of 18 Hz stirring for 1-3 hours, adding sodium polyacrylate, continuing to stir for 1-2 hours, taking out and placing in 120 degrees C oven, baking for 5-10 minutes, to obtain the dispersant. The binder is prepared by taking gelatine and modified polyacrylic ester, adding anhydrous ethanol of 0.8 times weight of the mixture, microwave processing for 2-3 hours, controlling the microwave power to 800-1000 w to obtain adhesive. The conductive agent preparation includes adding graphite, cobalt disulfide and nano-carbon fiber and butyrolactone, adding acetylene black for 15-20 minutes, applying a magnetic field intensity of 4650-4800 GS to obtain the conductive agent. The composite anode slurry preparation comprises uniformly mixing the solvent and binder at 30-40 degrees C, adding conductive agent and dispersant, carrying out ultrasonically dispersing for 1-2 hours, controlling the ultrasonic frequency is 50-65 KHz, continuously stirring and mixing uniformly for 2-4 hours, adding active material, stirring at speed of 3000-5000 rotations/minutes to obtain the graphene high-energy lithium battery composite anode paste.