Bandwidth tunable vibration energy harvester based on hybrid triboelectric-piezoelectric array

Abstract

In this work, we present a highly effective and scalable design strategy of a triboelectric-piezoelectric hybrid array of three cantilever beams stacked over each other (wideband operation regime), which can also be rotated around their mean position to vibrate freely without impacting any other layer (narrowband operation regime). Contrary to a unique frequency response exhibited by conventional devices, the proposed device can switch between narrowband and wideband frequency responses around different central frequencies. This work elaborately discusses the frequency response of mechanical stopper-based PEG and TEGs at varying gap lengths, excitations, and resonant frequencies, and the design of the hybrid array is optimized based on it. The performance of this device is characterized using simulation analysis and experimental validation. Experimentally, the device generates net power greater than 0.3 µW (Piezoelectric) and 0.4 µW (Triboelectric) continually between the frequencies of 30 to 60 Hz in the wideband operation regime and output power of 0.81 µW, 0.65 µW, and 0.62 µW at 18, 27, and 36 Hz in the narrowband operation regime under mechanical excitation of 0.75g. The remarkable performance of the device at different frequency ranges demonstrates its potential in various harvesting and sensing applications.

The role of optical fiber sensors in the new generation of healthcare devices: a review

“…198 For this reason, different technologies for energy harvesting are proposed and we discuss some of them in this section. It is important to mention that this is not an exhaustive review in energy harvesting (interested readers are advised to check review papers focused on this topic [199][200][201][202] ). However, piezoelectric, triboelectric, and solar concentrators, as well as thermoelectric approaches are discussed in this section.…”

Advanced materials for triboelectric nanogenerator

“…Some work creatively utilised piezoelectric-triboelectric hybridisation to improve the output performance of TENG [49,50]. For these energy harvesting devices, some researchers adopted the addition of piezoelectric NPs to improve the output performance.…”

Are piezoelectric-electromagnetic hybrid energy harvesting systems beneficial?

“…The performance of single-mechanism and hybrid energy harvesting systems in this study is compared primarily in terms of power and efficiency. However, it should be noted that a hybrid configuration, which combines piezoelectric or triboelectric and electromagnetic transducers, holds the potential to offer benefits in terms of operation bandwidth and can provide a broader design space for a power electronic interface [44,45].…”