Characterization and Dielectric Properties of Flexible PVDF/LiZnVO 4 nanocomposites for High-Performance Lithium-ion Battery Applications

Abstract Thin polymeric films of Poly(vinylidene fluoride) (PVDF) containing variable mass fractions of LiZnVO4 nanoparticles (LZV-NPs) were successfully synthesized via the ordinary solution casting route. X-ray diffraction (XRD), Fourier transform infrared (FT-IR), and ultraviolet-visible spectroscopy was used to explore the role of LZV-NPs on the structural and optical characteristics of synthesized nanocomposites. In addition, AC conductivity was investigated. The XRD spectral data reveals the crystalline nature of LZV-NPs with rhombohedral structure with an average size of 83 nm calculated using Scherer's equation. The interaction between PVDF and LiZnVO4 was approved through the shift in characteristic FT-IR bands. The decrease in band gap energies with increasing LiZnVO4 is attributed to the change of density in the localized states within the PVDF. The effect of both frequency and temperature on the AC parameters was also investigated. Both ε' and ε" had their maximum values at low frequencies and decreased as the frequency and temperature increased. The XRD and FT-IR findings were correlated with the change in dielectric characteristics at 5 wt. percent LiZnVO4, suggesting their potential use as a basic material for developing cutting-edge energy storage devices and lithium-ion batteries.