Energy harvesting and storage with ceramic piezoelectric transducers coupled with an ionic liquid-based supercapacitor

• DOI: 10.1016/j.est.2023.106660
• Publication Date: 2023-01-14T11:16:27Z
• Authors: Giacomo Selleri; Federico Poli; Riccardo Neri; Leonardo Gasperini; Chiara Gualandi; Francesca Soavi; Davide Fabiani
• Keywords: Lead zirconate titanate

One of the main issues wearable electronic devices regards their power supply and autonomy. The exploitation mechanical energy from body motion vibrations can be realized by using piezoelectric materials coupled with a proper storage device. To this aim, Self-Powered Supercapacitors (SPSCs) have been investigated over last decades, either as internally integrated SPSC (iSPSC), where element device is used Super Capacitor (SC) separator, or via an external integration (eSPSC), unit SC are connected bridge rectifier. In paper, eSPSC developed integrating stuck commercial ceramic disks ionic liquid-based micro-SC. detail, stack 15 lead zirconate titanate (PZT) harvesting mechanically stressed compressive force 85 N at 2 Hz. output successfully charged 22 mF supercapacitor up to 3.1 V after h test, achieving stored value equal 110 mJ. proposed system outperforms state-of-the-art assembled micro-SC (both iSPSC eSPSC). use two different units (piezo-energy unit) allows independent sizing tuning according current unit.