Preparation and characterization of poly(vinylidene fluoride): A high dielectric performance nano-composite for electrical storage

摘要

We have prepared films of polymer nano-composite (PNC) of poly [ vinylidene-fluoride] (PVDF) and bismuth vanadate (BiVO 4 ) nanoparticles. The α and γ electro-active phases were detected, and the addition of BiVO 4 drastically increases the formation of the α-phase. Addition of BiVO 4 produces up to 98% of electro-active phases. Robust electrostatic interactions arise between charges at the BiVO 4 -surfaces, and differences in electron affinity between CH2 and CF2 groups created dielectric dipoles. The addition of BiVO 4 has not only enhanced the formation of the electrically active phases but also makes each dipole in the phase has its specific characteristics for example its own relaxation time. The AC-electrical permittivity showed that the dielectric constant of 10%wt- BiVO 4 nanoparticles in PVDF has a value 44 ε 0 , which is four times more than the dielectric constant of the as-prepared PVDF films. These data show the importance of these polymers as easy, flexible, and durable energy storage materials.