High power density and flexible self-powered piezoelectric nanogenerator based on solution crystallization

摘要

A flexible self-powered piezoelectric nanogenerator (FSPN) of high power density was constructed using a poly (vinylidene fluoride) (PVDF) polymer matrix based on solution crystallization. Since the solubility parameter of the N-methylpyrrolidone (NMP) was closed to that of the PVDF, the FSPNs fabricated by PVDF and NMP showed a high concentrations of beta-phase and a high power density of 6.6 W/m(3) together with excellent mechanical properties and transparent. In addition, the FSPN retained its excellent performance even after 2000 cycles of cantilever vibration, which hold a great potential for harvesting mechanical energy for self-powered systems and provide a simpler solution for energy collection and utilization in our actual lives.