Porous, multi-layered piezoelectric composites based on highly oriented PZT/PVDF electrospinning fibers for high-performance piezoelectric nanogenerators

Abstract Piezoelectric nanogenerators (PENGs) that can harvest mechanical energy from ambient environment have broad prospects for multi-functional applications. Here, multi-layered piezoelectric composites with a porous structure based on highly oriented Pb(Zr 0.52 Ti 0.48 )O 3 /PVDF (PZT/PVDF) electrospinning fibers are prepared via laminating method to construct high-performance PENGs. PZT particles as reinforcing phases embedded in PVDF and facilitate the formation of polar ? phase PVDF. The multi-layered, effectively promotes overall polarization surface bound charge density, resulting efficient electromechanical conversion. PENG 10 wt% PZT/PVDF composite 220 µm film thickness outputs an optimal voltage 62.0 V power 136.9 µW, which 3.4 6.5 times those casting film-based PENG, respectively. Importantly, shows high sensitivity 12.4 V·N ?1 , presenting significant advantage comparison PENGs other structures. In addition, show excellent flexibility Young’s modulus 227.2 MPa elongation 262.3%. This study great potential application fiber flexible harvesting devices.