Hydroxylated BiFeO₃ as efficient fillers in poly(vinylidene fluoride) for flexible dielectric, ferroelectric, energy storage and mechanical energy harvesting application

Abstract

Hydroxylation of a BiFeO3 filler improved the dielectric permittivity, energy storage density and mechanical energy harvesting performance along with reduced dielectric loss of its PVDF based composites compared to that of an untreated BiFeO3 filler.

Strategies Involved in Enhancing the Capacitive Energy Storage Characteristics of Poly(vinylidene fluoride) Based Flexible Composites

“…PVDF‐based matrix, when loaded with filler materials, easily undergoes structural phase transformation due to interfacial interaction between its dipoles and filler surface. In our previous contribution, [167] the nature of this interfacial interaction is clearly shown which can be viewed in Figure 9. As described previously, the existence of different types of phases and their crystallinity play a very crucial role in determining the energy storage performance of PVDF‐based composites.…”

“…Schematic presentation of some interfacial interaction mechanism of PVDF dipoles with filler surface (BiFeO 3 and hydroxylated BiFeO 3 for this particular case). [167] (Reproduced with permission from Ref. [167].…”

Influence of Various Physiochemical Parameters of AFeO3 (A = Bi, Er, Ga, La, Sm, Y) Fillers on the Dielectric, Ferroelectric, Energy Storage, and Mechanical Energy Harvesting Performance of PVDF

“…have been previously reported to be responsible for performance modification of PVDF matrix based composite systems. [8,9] But, to the best of our knowledge, there is no report till date where the effect of crystal structure of filler nanoparticles in PVDF matrix has been studied explicitly. Therefore, the key objective of the present work was to determine the effect of this factor on the piezoelectric properties of the fabricated composites.…”

Effect of the Two-Dimensional Magnetostrictive Fillers of CoFe2O4-Intercalated Graphene Oxide Sheets in 3-2 Type Poly(vinylidene fluoride)-Based Magnetoelectric Films

“…In polymer ME films, PVDF has been commonly used as a piezoelectric phase with a strong dipole moment given by an electrically asymmetric β -phase with an all-trans (TTTT) configuration consisting of C–H and C–F bonds on opposite sides in the PVDF [ 13 , 14 ]. As a magnetostrictive phase in the polymer ME films, zero-dimensional (0D) or one-dimensional (1D) fillers have been used with spinel structure (AB 2 O 4 ) compositions to enhance the β -phase in the piezoelectric phase [ 15 , 16 , 17 ]. The shape of the magnetostrictive fillers is a critical determinant of strain transfer to the piezoelectric phase, polymeric phase conformation, and leakage current, which directly affect the ME responses in polymer-based films [ 18 , 19 ].…”