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- Title
Effect of Filler (SrWO<sub>4</sub>) on Structural, Dielectric, and Electrical Properties of Polymer Matrix PVDF.
- Authors
Hota, Sudhansu Sekhar; Panda, Debasish; Biswal, Lalatendu; Choudhary, Ram Naresh Prasad
- Abstract
Composites derived from polyvinylidene fluoride (PVDF) play an important role in advanced dielectric energy storage due to their outstanding characteristics, including remarkable flexibility, low density, high dielectric permittivity, and superior dielectric breakdown strength. The strategically designed composition significantly enhances the energy storage performance, such as discharge energy density (Ue) and charge–discharge energy efficiency (η). Consequently, we employed the solution cast method to create flexible composite films, combining PVDF polymer with strontium tungstate (SrWO4) ceramic. X-ray diffraction analysis revealed the coexistence of α and electroactive β phases in PVDF. These phases have a substantial effect on the dielectric characteristics and energy storage density of composites. Flexible nanocomposites of PVDF and SrWO4 exhibit high dielectric constant and low tangent loss. Micrographs obtained using scanning electron microscopy (SEM) showed that the morphology of the composite varies according to the amount of filler present in the matrix. The impedance spectroscopy method yielded intriguing findings regarding the roles of both grain and grain boundaries in the overall resistance characteristics of the composites. The frequency-dependent behavior of alternating conductivity follows Jonscher's power law. The hysteresis loops indicate that the nanocomposite film maintains favorable ferroelectric properties. The present study suggests some promising applications for advanced dielectric capacitors and energy storage devices.
- Subjects
DIELECTRIC strength; DIELECTRICS; ELECTROACTIVE substances; ENERGY density; POLYVINYLIDENE fluoride; HYSTERESIS loop; PERMITTIVITY; ENERGY storage; DIELECTRIC breakdown
- Publication
Journal of Electronic Materials, 2024, Vol 53, Issue 7, p4018
- ISSN
0361-5235
- Publication type
Article
- DOI
10.1007/s11664-024-11157-y