Issue 107, 2016, Issue in Progress

Enhanced dielectric and energy storage performance of surface treated gallium ferrite/polyvinylidene fluoride nanocomposites

Abstract

The ceramic–polymer nanocomposites composed of gallium ferrite (GFO) nanoparticles and employing sodium dodecylsulphate (SDS) as surfactant and polyvinylidene fluoride (PVDF) as matrix have been fabricated by solvent casting followed by hot-press technique. It was found that modified GFO nanoparticles favours nucleation and stabilization up to ∼84% electroactive phase (β- and γ-phase) in PVDF. Fourier transform infrared spectroscopy (FTIR) results revealed that the interfacial electrostatic interaction between nanoparticle surface charge and CH2/CF2 – molecular dipole of PVDF favoured nucleation of electroactive phase. Compared to the pristine PVDF, much higher dielectric constant (εr ∼ 25 at 10 kHz frequency) with low loss factor (tan δ ∼ 0.02 at 10 kHz) was achieved in the composite film. In addition, the nanocomposite showed higher electrical energy density (Ud ∼ 3.88 mJ cm−3 at an electric field 6 kV mm−1) compared to pristine PVDF which determined their applicability as flexible energy density capacitor.

Graphical abstract: Enhanced dielectric and energy storage performance of surface treated gallium ferrite/polyvinylidene fluoride nanocomposites

Supplementary files

Article information

Article type
Paper
Submitted
14 Sep 2016
Accepted
24 Oct 2016
First published
24 Oct 2016

RSC Adv., 2016,6, 105137-105145

Enhanced dielectric and energy storage performance of surface treated gallium ferrite/polyvinylidene fluoride nanocomposites

B. Adak, I. Chinya and S. Sen, RSC Adv., 2016, 6, 105137 DOI: 10.1039/C6RA22939E

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