Tuning the Performance of Flexible Lead-Free Zn-BCZT/PVDF-HFP Piezoelectric Nanogenerator

• Published in: 2021 18th International Multi-Conference on Systems, Signals & Devices (SSD) pp. 884 - 888
• Main Authors: Ayed, Amina Ben, Bouhamed, Ayda, Nouri, Hanen, Khemakhem, Hamadi, Kanoun, Olfa
• Format: Conference Proceeding
• Language: English
• Published: IEEE 22-03-2021
• Subjects: Conductivity; Force; Generators; Lead; Nanocomposites; Nanoparticles; output power; Piezoelectric devices; piezoelectric generators; polymer; voltage
• ISSN: 2474-0446
• DOI: 10.1109/SSD52085.2021.9429475

Recently, environmentally, friendly and flexible piezoelectric generators have attracted considerable interest in powering wearable and implantable devices. In this present work, a lead free and flexible piezoelectric nanogenerator with good efficiency is demonstrated, based on composite film of zinc doped \text{Ba}_{0.85}\text{Ca}_{0.15}\text{Ti}_{0.09}\text{Zr}_{0.10}\mathrm{O}_{3} (Zn-BCZT) nanoparticles embedded into polyvinylidenefluoride-co-hexafluoropropylene (PVDF-HFP) polymer. The effect of the different doping contents of Zn-BCZT on the electrical behavior and the output performance of piezoelectric nanogenerator were investigated. As a result, composite film with 7 wt.% contents Zn-BCZT shows an excellent performance, which generated the maximum open-circuit voltage of 2.24 V. Moreover, impedance spectra show increased conductivity with increasing of Zn-BCZT content. Besides, Zn-BCZT/PVDF-HFP nanogenerators generate the maximum power equal to 2.26\ \mu\mathrm{W} across a load resistance of 860\ \mathrm{k} \mathrm{\Omega} with 7% of content. The output voltage of the nanogenerator shows good linear relationship with the applied force. Due to the susceptibility of the force, the obtained piezoelectric composite can be used in several applications such as a sensor.