Enhancement of dielectric performance of encapsulation in barium titanate oxide using size-controlled reduced graphene oxide

Abstract

The controlled graphene size affected the dielectric performance of graphene encapsulated BaTiO3 (rGO@BTO) particles. The dielectric performance increased by 33% higher than the dielectric constant after 1 h, while maintaining the low dielectric loss.

2D‐Nanofiller‐Based Polymer Nanocomposites for Capacitive Energy Storage Applications

“…Further, Wang et al observed a huge enhancement of dielectric permittivity of the nanocomposites near the percolation thresholds which were 2.24 vol% for rGO-PVA/PVDF and 0.61 vol% for rGO/PVDF composites, respectively, as shown in Figure 4b. [45] Jun et al fabricated rGO-encapsulated BTO (rGO@BTO) films that showed an increase in dielectric constants up to 194 with a low dielectric loss of 0.053 due to the interfacial polarization, [46] as shown in Figure 4c,d. The rGOÀPU/BNÀPU microlaminate composites exhibited dielectric constants as high as 1084 with a low dielectric loss of 0.091 at 1 kHz and a maximum energy density of 22.7 J cm À1 , [3,47] as shown in Figure 4e.…”

“…[53] There are other studies conducted to explore dielectric properties of rGO/polymer nanocomposites; however, their reported efficiencies were comparably low. [45,46,[48][49][50][51][52][53][54][55][56]…”

“…Reproduced with permission. [ 46 ] Copyright 2022, Royal Society of Chemistry. e) Dielectric strength and energy density of PU, rGO‐PU, BN‐PU, and rGO‐PU/BN‐PU Composites.…”

“…c,d) Frequency-dependent dielectric constant and dielectric loss of BTO and rGO@BTO films. Reproduced with permission [46]. Copyright 2022, Royal Society of Chemistry.…”

Facile preparation and dielectric properties of BaTiO3 with different particle sizes and morphologies

“…Barium titanate (BaTiO 3 ) is a ferroelectric compound with excellent properties in the barium oxide-titanium dioxide (BaO-TiO 2 ) system, 1 which exhibits good dielectric as well as ferroelectric properties and is the basic material for electronic ceramic components. 2,3 Barium titanate nanoparticles are widely used to make small, high-capacity microcapacitors and temperature-compensating components; 4,5 as well as nonlinear components, dielectric ampliers, memory components for electronic computers, ceramic sensitive components, microwave ceramics, and piezoelectric ceramics. 6,7 In recent years, with the continuous development of the electronics industry, the demand for BaTiO 3 -based ceramics has been increasing; and higher requirements for BaTiO 3 purity, particle size, crystal shape, and dispersion have been proposed.…”