▎ 摘　　要

NOVELTY - Preparing polyvinylidene fluoride flower-shaped graphene composite piezoelectric film comprises (i) firstly preparing organic solvent, then dispersing the organic fluorine modified flower-shaped graphene in the organic solvent to obtain the mixed liquid I, (ii) adding polyvinylidene fluoride in the mixed liquid of step (i) to mix uniformly, preparing the polyvinylidene fluoride (PVDF) flower-shaped graphene mixed liquid II, (iii) coating and drying the mixed liquid II. USE - The piezoelectric film is useful in sensor and nano-generator. ADVANTAGE - The method enables to prepare polyvinylidene fluoride flower-shaped graphene composite piezoelectric film that improves the dispersibility of the PVDF matrix, and increases accumulation between the flower shaped graphene and PVDF substrate interface, thus greatly improving the piezo-electric performance of PVDF.