▎ 摘　　要

NOVELTY - Graphene-coated silkworm multi-level porous carbon-sulfur composite anode material has a discharge capacity of /-1000 milliamp hour/gram at maximum capacity of 1.0C and discharge capacity of /-800 milliamp hour/gram with high specific capacity of 1.0C and capacity retention rate is /-90%. USE - Graphene-coated silkworm multi-level porous carbon-sulfur composite anode material. ADVANTAGE - Graphene-coated silkworm multi-level porous carbon-sulfur composite anode material. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene-coated silkworm multi-level porous carbon-sulfur composite anode material, which involves: (A) preparing multi-stage porous carbon sandwiches; (B) mixing zinc chloride (ZnCl2) powder; (C) placing in high-temperature tube furnace; (D) inletting protective gas, blowing and heating the reaction to obtain porous carbon SPCH; (E) inputing porous carbon on the sulfur-laden by sujecting silkworm multi-level porous carbon into the quartz tube; (F) pouring the sulfur powder into the quartz tube, avoiding directly contact with the porous carbon; (G) pumping vacuum, sealing and putting into drying oven, and raising the temperature to 120-160 degrees C for 8-20 hours; (H) collecting the product material and naturally cooling to room temperature to obtain the SPCH/S1 composite material; (I) carring out secondary sulfur-loading by placing SPCH/S1 composite material in sodium thiosulfate solution; (J) adding hydrochloric acid solution dropwise; (K) standing for chemical deposition of secondary sulfur-loaded reaction for 2-5 hours; (L) filtering centrifugally and drying to obtain multi-stage pore composite sulfur positive pole material; (M) carrying out the graphene coating process by placing the SPCH/S composite material in aqueous solution of graphene oxide, where mass ratio of the SPCH/S and graphene oxide is 5-19:1; and (N) stirring for mixing, putting in microwave reactor for heating and reacting to obtain graphene coated carbon-sulfur composite anode material i.e. G-SPCH/S.