▎ 摘　　要

NOVELTY - Method for preparing graphene-based organic composite material involves (i) dispersing graphene in an organic solvent to obtain dispersion liquid containing graphene, (ii) adding pyromellitic dianhydride and melamine to the dispersion obtained in step (i) to obtain reaction liquid, and (iii) subjecting the reaction solution obtained in step (ii) to solvothermal polymerization and reacting to obtain graphene-based polyimide composite material precursor, sequentially washing and drying the graphene-based polyimide composite material precursor and calcining to obtain graphene-based organic composite materials. USE - Method for preparing graphene-based organic composite material (claimed) used as a negative electrode material in sodium ion batteries. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for using graphene-based organic composite material involving mixing graphene-based organic composite material, carbon black and polydifluoroethylene to obtain mixed solution, applying the mixed solution to electrode sheet to obtain electrode material, and using pure sodium sheet as a counter electrode to form a sodium ion button half-cell.