Ultrahigh-Output Triboelectric and Electromagnetic Hybrid Generator for Self Powered Smart Electronics and Biomedical Applications

摘要

Biomechanical energy harvesting shows great potential in the fields of smartelectronics and biomedical Internet of Things. However, it is a significantchallenge to develop a biomechanically driven energy harvester with highoutput power and fast charging as a sustainable power source for extendedpractical applications. Herein, an ultrahigh-output triboelectric and electromagnetichybrid generator (UHO-TEHG) is developed to efficiently harvestbiomechanical energy and provide self-powered systems for numerousapplications. The Halbach magnet array is used to concentrate additionalmagnetic flux in the coil and significantly enhance electromagnetic performance,while the novel poly(ethylene oxide) nanofibers enhance the triboelectricperformance. Through the implementation of a mechanical spring-massmodel, and rational integration of electromagnetic and triboelectric generators,the UHO-TEHG can provide an excellent output power of 1.02 W.Compared with existing mechanical energy harvesting devices, the fabricateddevice exhibits a much faster battery charging performance. Experimentalresults reveal remarkable performance related to biomechanical energy harvestingduring walking, running, hiking, mountaineering, and self-poweredwireless human motion sensor. Real-time charging of smartphones, smartwatches,Buds Live, and iTag via customized power management circuitsis demonstrated. In addition, the fabricated UHO-TEHG demonstrates thecapability to power healthcare monitoring systems using a laser-inducedhierarchical carbon nanofiber-based e-tattoo sensor.