Enhanced dielectric properties of surface hydroxylated bismuth ferrite Poly (vinylidene fluoride co hexafluoropropylene) composites for energy storage devices
Abstract Dielectric properties of Poly (vinylidene fluoride co hexafluoropropylene) (PVDF HFP) based composites with surface hydroxylated BiFeO 3 (h BFO) particles were prepared by solution casting techniques. The h BFO fillers were synthesized from BiFeO 3 in aqueous solution of H 2 O 2 The result showed that the dielectric properties of the h BFO PVDF HFP composite exhibits better dielectric properties than that of the unmodified BFO PVDF HFP composites. Meanwhile, the 30 wt% of h BFO PVDF HFP composite showed higher dielectric constant, better suppressed dielectric loss, high remnant polarization and high electrical conductivity. It is suggested that the strong interaction between h BFO particles and PVDF HFP matrix at the interface is the key role in the enhancement of the dielectric properties. It is helpful to understand the influence of surface hydroxylation on the interfaces between the filler and the polymer matrix. The outcome of this study may be exploited in the progress of high energy storage device applications.