Poly(vinylidenefluoride-co-trifluoroethylene)(P(VDF-TrFE))is a copolymer of polyvinylidene fluoride(PVDF)that exhibits outstanding piezoelectric properties,mechanical properties,and biocompatibility.Therefore,the flexible piezoelectric sensors and energy harvesters based on P(VDF-TrFE)have a promising future in the fields of intelligent textiles,wearable electronic devices and medical and health systems.These devices can convert signals such as tactile,pressure,strain,acoustic waves or even physiological micro-vibrations into electrical signals or low-power electrical energy.This paper aims to provide an in-depth analysis of the mechanism of P(VDF-TrFE)piezoelectric properties,summarize various strategies to enhance the piezoelectricity of electrostatically spun P(VDF-TrFE)nanofibers,and provide a comprehensive overview of the applications of P(VDF-TrFE)-based flexible piezoelectric sensing and energy harvesting.Specifically,research advances in the areas of pressure and tactile sensing,acoustic sensing,biological tissue sensing,physiological micro-vibration sensing,and energy harvesting are summarized.Finally,the emerging application scenarios of electrospun piezoelectric polymer nanofibers are illustrated,the current challenges and future prospects in this field are discussed.
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