|
Breakthroughs in mechanical energy harvesters have been achieved by taking advantage of triboelectric nanogenerators as sustainable energy supplies for widely distributed sensors. However, achieving high performance and stable power generation is still a remained challenge. Herein, we report a discoidal direct-current triboelectric nanogenerator based on the multiple-phase difference coupling principle that allows for stable high-efficiency mechanical energy harvesting with low crest factor. The contribution of low crest factor is benifited from that of phase difference between electrode pairs by the regularly shifted electrical output from each phase. Our study shows that the crest factor of direct-current output is down to 1.07, indicating its outstanding ability of stable electricity generation. Moreover, attributed to the soft polyester fur used as triboelectric material, the device shows decent output performance and durability, achieving a peak power density of 10.38 mW and little abrasion of tribo-layers after 80,000 rotation cycles. More interesting, the proposed device can dive the optical computing chip successfully for signal processing, forming a self-powered monitoring system in electromagnetic environments, and demonstrating a promising strategy of sustainable and stable power supply towards self-powered sensing systems.
|
