Eintrag in der Universitätsbibliographie der TU Chemnitz
Volltext zugänglich unter
URN: urn:nbn:de:bsz:ch1-qucosa2-1025328
Missaoui, Sarra
Kanoun, Olfa (Prof. Dr.-Ing.) ; Joseph, Yvonne (Prof. Dr. rer. nat.)
High-Performance Piezoelectric Nanogenerators Based on Sol-Gel Synthesized BCZT Hybrid Nanocomposites
Kurzfassung in englisch
Piezoelectric nanogenerators (PENGs) convert mechanical energy into electricity for self-poweredwearable electronics. This thesis develops eco-friendly lead-free BCZT-MWCNT-PDMS
nanocomposites for energy harvesting. BCZT was synthesized by the sol-gel method, enabling
stoichiometric control and nanoscale particle formation. An optimized 15 wt.% BCZT composite
generated a power density of 15.5 µW/cm³. Incorporating MWCNTs promoted conductive network
formation, self-polarization, and dipole alignment without electrical poling. Optimized sonication
improved filler dispersion, while 0.5 wt.% MWCNTs at the percolation threshold achieved 35.6
µW/cm³. The influence of calcination temperature (600-1000°C) on BCZT structural and piezoelectric
properties was investigated. Calcination at 900°C produced crystalline nanoparticles with an average
crystallite size of 18.16 nm and particle size of 68.9 nm. XRD and Raman analyses confirmed high
crystallinity and a morphotropic phase boundary, enhancing polarization rotation and domain wall
mobility. The optimized BCZT-900/PDMS nanogenerator achieved 7.8 V and 29.5 µW/cm³ under cyclic
loading with stable performance over 5000 cycles. Adding 0.5 wt.% MWCNTs increased performance
to ±10 V and 53.2 µW/cm³. Monte Carlo Metropolis simulations confirmed the effect of calcination
temperature on crystallinity and charge mobility. These results demonstrate scalable, performance
PENGs fabricated through an environmentally friendly process.
| Universität: | Technische Universität Chemnitz | |
| Institut: | Professur Mess- und Sensortechnik | |
| Fakultät: | Fakultät für Elektrotechnik und Informationstechnik | |
| Dokumentart: | Dissertation | |
| Betreuer: | Kanoun, Olfa (Prof. Dr.-Ing.) | |
| ISBN/ISSN: | 978-3-96100-314-3 (print), 978-3-96100-315-0 (online) | |
| DOI: | doi:10.51382/978-3-96100-315-0 | |
| URL/URN: | https://nbn-resolving.org/urn:nbn:de:bsz:ch1-qucosa2-1025328 | |
| Quelle: | Chemnitz : Universitätsverlag Chemnitz, 2026. - 280 S. - Scientific Reports on Measurement and Sensor Technology ; Volume 42 | |
| SWD-Schlagwörter: | Energiegewinnung , Kristallinität , Biegsamkeit | |
| Freie Schlagwörter (Englisch): | Piezoelectric nanogenerator , Energy harvesting , BCZT , Multi-walled carbon nanotubes , Calcination temperature , Crystallinity , Morphological optimization , Self-polarization , Monte Carlo Metropolis simulation , Mechanical flexibility , Wearable | |
| DDC-Sachgruppe: | Technik, Medizin, angewandte Wissenschaften, Ingenieurwissenschaften, Angewandte Physik, Keramiktechnologie und zugeordnete Technologien | |
| Sprache: | englisch | |
| Tag der mündlichen Prüfung | 04.02.2026 | |
| OA-Lizenz | CC BY 4.0 |
