Frequency band broadening and charge density enhancement of a vibrational triboelectric nanogenerator with two stoppers

Vibrational triboelectric nanogenerators (V-TENG) can be used to harvest broadband vibration energy due the nonlinear impact force induced by a stopper. However, V-TENGs with single stopper have limited bandwidth and surface charge density, which has their application in wideband harvesting. Herein, V-TENG two stoppers pumping effect is proposed for frequency band broadening density enhancement. The theoretical analysis experimental validation indicated could improve 75% compared one at gap distance of 0.5 mm. Moreover, pump constructed output channels, improved about 14 times. With varying from 18 38 Hz, continually power 400 LEDs commercial capacitor quickly. This work shown an encouraging method enhancing performance V-TENGs, also great prospects harvesting machines, cars, ships, human motions self-powered electronics. mechanism enhancement technique vibrational TENG were systematically elaborated. introduction double-sided strengthens characteristics broadens band. Furthermore, high-performance based on (CPV-TENG) according channels V-TENG. • Research simulation. Demonstration features under different conditions exploration. A CPV-TENG effects