Autors: Aleksandrova, M. P., Pandiev, I. M.
Title: Printed Piezoelectric Harvester for Integration in a Wearable Energy Storage Device
Keywords: DC-DC boost converter, energy harvesting, flexible electronics, piezoelectric element, switched inductor

Abstract: Energy storage and harvesting technologies are intricately linked. Various technologies have been developed to convert environmental energies into electricity. For instance, piezoelectric nanogenerators (PENGs) capture mechanical motion/vibration energy. Additionally, efforts have been directed towards integrating these energy harvesting devices into flexible/wearable units suitable for wearable electronics. This study showcases a printed flexible piezoelectric energy harvester with PVDF-TrFE and silver electrode, organized as a double-sided coating onto the polyethylene terephthalate (PET) substrate, thus forming the front side electrode for the PENG and backside electrode for a storage thin film element. A dielectric film of Al2O3 and the top electrode of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)/ graphene composite are applied by printing, realizing layer-by-layer assembly. The capabilities of the energy harvesting devices were characterized by a one-point eclipsed bending test, and the experimental results are presented to substantiate the potential utility of the fabricated device. This method provides a more controlled and uniform loading scenario for accurate testing without dependence on the sample length. It was found that loading of 100 g/cm2 produces a symmetric electrical signal with a magnitude of ~ ±0.4 V from a sample with an area of 2.5 cm2. This voltage is sufficient to drive the charging of a sample supercapacitor, which will be investigated further.

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Issue

Proceedings of the International Spring Seminar on Electronics Technology, pp. 148-153, 2024, , https://doi.org/10.1109/ISSE61612.2024.10604189

Вид: публикация в международен форум, публикация в реферирано издание, индексирана в Scopus и Web of Science