PVDF-based and its Copolymer-Based Piezoelectric Composites: Preparation Methods and Applications

Recently, for their advantages of lightweight, easy-shaped, good corrosion resistance, biocompatibility, etc., a series of flexible poly (vinylidene fluoride)-based (PVDF-based) piezoelectric composites have been proposed for use in self-powered electronic devices, such as piezoelectric nanogenerators, sensors, wearable electronic units, etc. In this review, we classify the polymer-based piezoelectric composites, combine their preparation method, filler type, structure, and performance, etc., and explain in detail the effects of different preparation methods and filler types on the piezoelectric properties of the composites. Then, the influence of composition, structure, and forming method on the piezoelectric and energy-transforming performances are investigated. Finally, the development trends of these PVDF-based piezoelectric composites are prospected. This review may provide a reference for the academic and application of the polymer-based piezoelectric composites in energy transfer-related and harvesting-related areas.