▎ 摘　　要

NOVELTY - The method involves dissolving phosphate/phosphoric acid in water. A tubular furnace is filled with phosphate-graphene gel precursorat nitrogen to obtain phosphate-graphene composite anode material. The phosphate-graphene composite anode material and a carbon nano-tube are dispersed in pyrene/pyrene derivative solution to obtain pyrene derivative modified phosphate-graphene composite anode material and a pyrene derivative modified carbon nano-tube. The carbon nano-tube and the phosphate-graphene composite anode material are decompressed, filtered and dried to obtain a product. USE - Graphene-carbon nano-tube composite structure construction phosphate based flexible lithium ion secondary battery anode preparation method. ADVANTAGE - The method enables realizing secondary battery anode preparation process in a simple manner with low cost, avoiding need of conductive agent during battery manufacturing process, reducing working procedure, active substance and conductive agent, obviously improving electrode energy density and ensuring better circulation property, multiplying power property, mechanical property, electrochemical property and high safety performance and reliability. DETAILED DESCRIPTION - The pyrene derivative solution is water/ethanol. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a flexible lithium ion secondary battery anode.