A Scalable Nanogenerator Based on Self-Poled Piezoelectric Polymer Nanowires with High Energy Conversion Efficiency

摘要: Nanogenerators based on piezoelectric materials convert ever-present mechanical vibrations into electrical power for energetically autonomous wireless and electronic devices. Nanowires of polymers are particularly attractive harvesting energy in this way, as they flexible, lightweight sensitive to small vibrations. Previous studies have focused exclusively nanowires grown by electrospinning, but involves complex equipment, high voltages $\approx$ 10 kV that electrically pole the thus render them piezoelectric. Here we demonstrate poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) using a simple cost-effective template-wetting technique, can be successfully exploited nanogenerators without poling. A typical nanogenerator comprising 10$^{10}$ highly crystalline, self-poled, aligned spanning 2 cm$^2$ is shown produce peak output voltage 3 V at 5.5 nA response low-level The mechanical-to-electrical conversion efficiency 11% exhibited our template-grown comparable with best previously reported values. Our work therefore offers scalable means achieving high-performance next generation self-powered electronics.