Hierarchical nanostructured polyaniline functionalized graphene/poly(vinylidene fluoride) composites for improved dielectric performances

Flexible Solid‐State Symmetric Supercapacitors Using HxWO3@Reduced Graphene Oxide Composite with High Volumetric Energy and Power Densities

“…From the height profile of rGO flakes the average height is found to be 2.45±0.51 nm. The thickness of graphene oxide is ∼0.80 nm; So there is approximately three layers of graphene are present in the rGO sheet. From the height profile of HxWO 3 the average height is found to be 2.82±0.90 nm.…”

High Energy Density in Poly(Vinylidene Fluoride‐Chlorotrifluoroethylene) Nanocomposite with Oriented Graphene Exfoliated with Assistance of Fluoro Hyperbranched Copolymer

“…The incorporation of nucleation nanofillers, for instance, ferroelectric ceramics, magnetic particles, and metal fillers, would vary the crystallinity and the electroactive phase in the PVDF nanocomposite. [26,[36][37][38][39] Furthermore, it is evidenced that the stretching technology is an effective approach to rearrange the macromolecular chains and subsequently increase the fraction of the electroactive phase. The melting point of the P(VDF-CTFE) film is enhanced after the mechanical improvement ( Figure S2, Supporting Information).…”

“…The dielectric constant of 60.6 at 100 Hz and energy‐harvesting density of 14.1 J cm −3 at 400 MV m −1 were obtained in 10 vol% PVDF composite embedded with NH 2 ‐treated graphene nanodot and rGO as co‐fillers . The polyaniline functionalized graphene was added into the PVDF matrix, and ε ′ = 264 with a dielectric loss of 1.1 at 100 Hz was obtained in 5 wt% composite, which was attributed to the synergistic effect under uniform dispersion . Nevertheless, the presence of oxygen‐containing groups in rGO induces the deterioration of electrical property and thermal conductivity compared with graphene .…”

“…[25] The polyaniline functionalized graphene was added into the PVDF matrix, and ε 0 ¼ 264 with a dielectric loss of 1.1 at 100 Hz was obtained in 5 wt% composite, which was attributed to the synergistic effect under uniform dispersion. [26] Nevertheless, the presence of oxygen-containing groups in rGO induces the deterioration of electrical property and thermal conductivity compared with graphene. [27] Also, the preparation of GO usually requires hazardous reagents, which is accompanied by the safety issues and environmental pollutions.…”

Integration of PDA Chemistry and Surface‐Initiated ATRP to Prepare Poly(methyl methacrylate)‐Grafted Carbon Nanotubes and Its Effect on Poly(vinylidene fluoride)–Carbon Nanotube Composite Properties

“…These materials combine the advantages of fillers, such as high dielectric constant and good electrical conductivity, as well as the merits of polymers, such as proper processing, flexibility, mechanical properties, and high breakdown strength. Recently, the incorporation of conductive fillers such as carbon black (CB), carbon nanotubes (CNTs) and graphene into polymer matrix has been considered as an effective strategy for fabricating polymer nanocomposites with high dielectric constants based on the percolation effect. Among the various conductive fillers, multiwalled carbon nanotubes (MWCNTs) have great potential for realizing flexible high‐k nanocomposites due to their superior conductivity, large aspect ratio, and excellent mechanical properties.…”