Magnetic Suspension Damped Hybrid Nanogenerator for Water Wave Energy Harvesting

Abstract

Although the damped triboelectric nanogenerator with an assisted pendulum and spring structure has the significant advantages in harvesting water-wave energy, these designs have reduced the space utilization of devices. Meanwhile, the indispensable and high-weight power take-off device in the related researches greatly also reduces the space utilization and anti-overturning performance of device. Here, a magnetic suspension damped hybrid nanogenerator (MSDHN) is designed for water-wave energy harvesting. A magnetic suspension damping system with the high-efficient water-wave power capture is developed by using two magnets and an oriented guide rail. Meanwhile, the design of high-weight coils and magnet at the bottom giving the entire device excellent anti-overturning capability while the sandwich structure improves the electromagnetic generator output performance by the higher change of magnetic flux. Furthermore, the development of nanofiber film with the high-positive triboelectric performance and the structure optimization significantly enhance the output performance of triboelectric nanogenerator. Importantly, relying on the integrated structural design, the entire device has obtained the space utilization of 98.8%. Finally, thanks to the high output performance and space utilization, the magnetic suspension damped hybrid nanogenerator achieves an ultrahigh power density of 628.9 W m⁻³. This research will greatly promote the large-scale development and application of water-wave energy.