▎ 摘　　要

NOVELTY - Complex material comprises 2-5 pts. wt. silicon carbide fine powder, 15-34 pts. wt. polycarbonate, 7-15 pts. wt. sodium hydrogencarbonate, 10-20 pts. wt. chloroform, 2-6 pts. wt. bamboo fiber, 3-8 pts. wt. polyethylene, 2-10 pts. wt. isopentanol, 10-18 pts. wt. graphene, 4-8 pts. wt. aluminum powder, 1.5-4 pts. wt. sodium chloride pentahydrate, 5-10 pts. wt. ethyl acetate and 1-3 pts. wt. acrylamide. USE - The material is useful in lithium battery (claimed). ADVANTAGE - The battery has initial discharge capacity of more than 860 mAh/g, the first discharge efficiency of more than 75%, the discharge capacity loss rate after 1500 cycles of less than 3.9%, current capacity of 30C discharge capacity of more than 640mAh/g and the current is 30C and the capacity rate of more than 97.2%. The complex material improves the first discharge efficiency and reduces the number of cycles after multiple cycles. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for producing complex material, comprising (i) mixing the polycarbonate, sodium hydrogencarbonate, pentaerythritol and chloroform at room temperature for 40-90 minutes and removing the chloroform to obtain a first mixture, (ii) placing the silicon carbide fine powder, the aluminum powder, the bamboo fiber and the polyethylene in a ball mill tank and ball milling for 4-6 hours under a protective atmosphere of an inert gas to obtain a second mixture, (iii) mixing graphene, sodium chloride pentahydrate and ethyl acetate, adding acrylamide, stirring at 40-50 degrees C for 60-100 minutes and removing ethyl acetate to obtain a third mixture and (iv) mixing the first mixture, the second mixture and the third mixture, heating and carbonizing under an inert gas atmosphere, cooling naturally to room temperature, washing the solid residue with an alkaline solution, washing with deionized water and drying under vacuum conditions.