Issue 22, 2012

Nanocomposites of ferroelectric polymers with surface-hydroxylated BaTiO3nanoparticles for energy storage applications

Abstract

A facile surface hydroxylation treatment using hydrogen peroxide to modify the surface of BaTiO3 nanofillers dispersed in a ferroelectric copolymer host has been investigated. We demonstrate that the surface functionalization of the BaTiO3 nanofillers (<100 nm) with hydroxyl groups results in as much as two orders of magnitude reduction in the leakage current of nanocomposite thin-film capacitors. This reduction is observed concurrently with the enhancement of the effective permittivity and breakdown strength of the thin-film nanocomposites. Surface modified BaTiO3 particles display better dispersion within the polymer matrix, resulting in enhanced relative permittivity and reduced dielectric loss. The dielectric behavior of the nanocomposite films containing up to 30 vol.% BaTiO3 agreed well with the Bruggeman model. These results demonstrate the potential of facile surface hydroxylation of nanoparticles towards the fabrication of higher energy-density nanocomposites.

Graphical abstract: Nanocomposites of ferroelectric polymers with surface-hydroxylated BaTiO3 nanoparticles for energy storage applications

Article information

Article type
Paper
Submitted
28 Jan 2012
Accepted
08 Apr 2012
First published
01 May 2012

J. Mater. Chem., 2012,22, 11196-11200

Nanocomposites of ferroelectric polymers with surface-hydroxylated BaTiO3 nanoparticles for energy storage applications

M. N. Almadhoun, U. S. Bhansali and H. N. Alshareef, J. Mater. Chem., 2012, 22, 11196 DOI: 10.1039/C2JM30542A

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