▎ 摘　　要

NOVELTY - Preparing composite material comprises (i) dividing graphene powder in water, stirring and ultrasonating to uniformly disperse to obtain solution A, (ii) diversifying nitrogen-containing compounds in corresponding solvent, and completely dissolving dissolution to obtain solution B, and (iii) heating solution B, adding solution A after specific temperature, stirring for while, stop heating, crystal precipitating static until, centrifuging, washing and freezing to obtain composite material. USE - The method is useful for preparing composite material. ADVANTAGE - The method: improve surface affinity of graphene, couples with nano-size effect of graphene, and reduces mechanical sensitivity; and is simple and suitable for industrial production.