Converting biomechanical energy wasted during human locomotion into electrical energy is a promising avenue for powering body-worn devices such as smartwatches, fitness bands, health monitoring sensors such as CGM, pulse sensor, etc. However, most of the conventional energy harvesting devices were not actually wearable and challenging for real time practical applications. 

In this project, we designed a novel curve-shaped wearable hybridized electromagnetic-triboelectric nanogenerator, operating as a fully-enclosed light-weight low-frequency energy harvester, driven by human motion. The device can power a commercial wrist watch continuously for 7 minutes from just 5 seconds of arm swinging during locomotion.