Nanocomposites of ferroelectric polymers with surface-hydroxylated BaTiO 3 nanoparticles for energy storage applications

Mahmoud Nassar Mahmoud Almadhoun, Unnat Sampatraj Bhansali, Husam N. Alshareef

Research output: Contribution to journalArticlepeer-review

105 Scopus citations

Abstract

A facile surface hydroxylation treatment using hydrogen peroxide to modify the surface of BaTiO 3 nanofillers dispersed in a ferroelectric copolymer host has been investigated. We demonstrate that the surface functionalization of the BaTiO 3 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 BaTiO 3 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.% BaTiO 3 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. © 2012 The Royal Society of Chemistry.
Original languageEnglish (US)
Pages (from-to)11196
JournalJournal of Materials Chemistry
Volume22
Issue number22
DOIs
StatePublished - 2012

ASJC Scopus subject areas

  • Materials Chemistry
  • Chemistry(all)

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