▎ 摘　　要

NOVELTY - Preparing highly graphitized graphite thick film comprises (ia) adding the nanosheet material and diamine into the organic solvent separately, mixing, continuously adding dianhydride to react, coating the obtained polyamic acid solution on the carrier, performing drying and thermal imidization to obtain a polyimide film doped with nanosheet material; (ib) adding nanosheet material and polyimide material into the organic solvent separately, mixing, applying the obtained polyimide glue to the carrier, and drying to obtain a polyimide film doped with nanosheet material; (iii) carbonizing the polyimide film doped with nano-sheet material; and (iv) graphitizing the carbonized sample. USE - The method is useful for preparing highly graphitized graphite thick film. ADVANTAGE - The method is simple and has broad industrialized prospects and strong practicability and does not require spraying during the preparation process and saves energy, realizes industrialized production. The film is light in weight and flexible, and increases the degree of graphitization inside the polyimide thick film, solves the problems of fragility of the finished product and incomplete graphitization inside and improves the electrical and thermal conductivity of the finished product and broadening its application range. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for graphite thick film prepared by above mentioned method, where the thickness of the graphite thick film is 75-150 mu m.