2024 - Sustainable Industrial Processing Summit
SIPS 2024 Volume 14. Intl. Symp on Advanced Materials, Manufacturing, Magnesium and Aluminum
| Editors: | F. Kongoli, F. Marquis, N. Chikhradze, T. Prikhna, E. Suhir, Y. Yang |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2024 |
| Pages: | 258 pages |
| ISBN: | 978-1-998384-30-3 (CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
CD shopping page
FLEXIBLE HIGH-POWER PIEZOELECTRIC NANOGENERATOR FABRICATION: AUGMENTING ELECTROACTIVE Β- AND Γ-PHASES OF PVDF WITH SUPERSONICALLY SPRAYED Sr2SnO4 NANORODS
Woojin Lim1;1KOREA UNIVERSITY, Seoul, South Korea;
Type of Paper: Regular
Id Paper: 412
Topic: 43
Abstract:
The presence of electroactive β- and γ-phases in poly(vinylidene fluoride) (PVDF) increased by more than two folds upon supersonically spraying Sr2SnO4 nanorods (SSO-NRs). Shear stress between the PVDF and SSO-NRs, induced by supersonic blowing and catastrophic impact against the substrate, amplified the β- and γ-phases, which enhanced the energy-harvesting performance of a flexible piezoelectric nanogenerator (PENG). The high-aspect-ratio SSO-NRs magnified the influence of shear stress by intensifying the turbulence induced by their swirling. The supersonically driven shear stress caused multidirectional stretching, elongation, and twisting of the PVDF and transformed a large amount of the α-phase into electroactive β- and γ-phases, as evidenced by X-ray diffractometry and infrared spectroscopy. The composite film with a minimal filler content of 2.5 wt% exhibited a piezopotential of 40 V without additional poling. The optimal SSO/PVDF-based PENG delivered a high power density of 87 µW·cm−2, when it was subjected to a tapping force. Furthermore, the practical applicability of the PENG was illustrated using air pressure, vibration, and human body movements. The fabricated PENG device was integrated with a supercapacitor electrode to demonstrate its wide range of applications in wearable and portable electronics.