▎ 摘　　要

NOVELTY - Preparing a piezoelectric film involves dissolving the vinylidene fluoride-trifluoroethylene copolymer in the solvent to form vinylidene fluoride-trifluoroethylene pre-solution, and dissolving graphene in a solvent to form a graphene suspension. The vinylidene fluoride-trifluoroethylene pre-solution and graphene suspension are mixed and dispersed to obtain a vinylidene fluoride-trifluoroethylene graphene solution. The vinylidene fluoride-trifluoroethylene/graphene solution is coated on a substrate and dried to form a film to be processed. The film to be processed is polarized to obtain the required piezoelectric film. USE - Method for preparing a piezoelectric film. ADVANTAGE - The method enables to prepare a piezoelectric film with high temperature resistance.