▎ 摘　　要

NOVELTY - Conductive multifunctional film layer coated composite anode material comprises conductive carbon/sulfur composite covered from inside to outside with graphene film layer, ion polymer functional film layer and conductive polymer functional film layer. USE - Conductive multifunctional film layer coated composite anode material. ADVANTAGE - The conductive multifunctional film layer coated composite anode material has structural performance, high specific capacity, high coulomb efficiency and long cycle life. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing conductive multifunctional film layer coated composite anode material which involves: (A) mixing the conductive carbon and sulfur according to 1:4-1:9, performing ultrasonic treatment for 30-180 minutes to dissolve into the organic solvent, and then performing low temperature vacuum evaporation to remove the organic solvent, where the vacuum degree is 500-5000 Pascal and evaporation temperature is 30-60 degrees C to obtain the carbon/sulfur composite; (B) adding carbon/sulfur composite into the graphene oxide aqueous solution, stirring, adding reducing agent, stirring for 2-10 minutes to obtain black flocculent precipitate, filtering, washing and drying to obtain the graphene coated carbon/sulfur composite particles having diameter of not less than 8 micron; (C) coating ion polymer on graphene coated carbon/sulfur composite by dispersing in the ion polymer monomer aqueous solution for 20-120 minutes at 10-40 degrees C, filtering, washing and drying to obtain the ion polymer coated graphene/carbon/sulfur composite material; (D) putting the ion polymer coated graphene/carbon/sulphur composite material in the low temperature vapor deposition vessel, introducing the gaseous polymer monomer and oxidant, depositing for 20-120 minutes under the vacuum state of 100-1000 Pascal and rotating container at 300-1200 revolutions/minute; and (E) cleaning, filtering the obtained product and drying to obtain the conductive multifunctional film layer coated composite anode material.