Comparative Study of Lead-free Ferroelectric Nanoparticles to Boost the Performance of Flexible Nanogenerators

• Published in: 2021 International Workshop on Impedance Spectroscopy (IWIS) pp. 26 - 29
• Main Authors: Jeder, Khawla, Bouhamed, Ayda, Ayed, Amina Ben, Nouri, Hanen, Khemakhem, Hamadi, Kanoun, Olfa
• Format: Conference Proceeding
• Language: English
• Published: IEEE 29-09-2021
• Subjects: Barium; BCZT; Doping; Ferroelectric; nanogenerator; Nanoparticles; Piezoelectric; Powders; Power system measurements; Production; Sol-gel; Spectroscopy; Voltage
• DOI: 10.1109/IWIS54661.2021.9711874

Due to its excellent piezoelectric, ferroelectric and dielectric properties, lead-free ceramic BaTiO3 has attracted much attention for the production of nanogenerator materials. In the present paper, lead-free piezoelectric materials (Ba, Ca)(Zr, Ti)O 3 was synthesized by the sol-gel method. In addition, Ca 2+ and Zr 4 + were substituted into the BaTiO3 crystal lattice to replace Ba 2+ and Ti 4+ , respectively, to enhance the material properties. Subsequently, the ((Ba, Ca)(Zr, Ti)O 3 powders were firstly mixed with poly(vinylidene fluoride)-co-hexafluoropropylene (PVDF-HFP) to prepare nanocomposite films. The performance of the fabricated nanocomposites was studied using both impedance and piezoelectric measurements. In this work, a maximum output voltage (∼1.8 V) and power density (\sim 1.9\ \mu \mathrm{W}/\text{cm}^{3}) were achieved for the composite incorporating BCZT particles. These results demonstrate the advantage of doping A and B sites for improving the piezoelectric performance.