A non-resonant rotational triboelectric energy harvester with high output performance

Energy harvesting technology has received significant attention around the globe over decades. However, it meets with difficulties of achieving high output performance under non-resonant frequency. In this paper, a non-resonant rotational triboelectric energy harvester with high output performance, which relied on the coupling of triboelectrification and electrostatic induction, was presented. The harvester introduced a cylindrical stator and disk-shaped rotor, which are made of NdFeB. Without complicated movement mechanism, the stator and rotor, of a higher pair have theoretical line contact by magnetic attractive force. Under a hand shake frequency of about 8Hz, the peak-peak value can reach to 140V. The maximum power of 0.31mW was obtained at a resistance of about 10⁷Ω. In addition, the voltage can reach up to 154V when running at a speed of 8 km/h on the treadmill. The harvester can be potentially used as a power supply to intelligent wearable devices.