Nanocomposites of ferroelectric polymers with TiO2 nanoparticles exhibiting significantly enhanced electrical energy density

Junjun Li, Sang Il Seok, Baojin Chu, Fatih Dogan, Qiming Zhang, Qing Wang

Research output: Contribution to journalArticlepeer-review

413 Scopus citations


A study was conducted to report high-energy-density polymer nanocomposites, based on surface-functionalized titanium dioxide (TiO2) nanocrystals, as dopants in a ferroelectric poly(vinylidene fluoride-ter- trifluoroethylene-ter-chlorotrifluoroethylene) (P(VDF-TrEF-CTFE). It was demonstrated that the polymer matrix and TiO2 filler possess similar dielectric permittivities of 42 and 47. The dielectric permittivities of the polymer matrix and TiO2 filler were measured, using an inductance, capacitance, resistance meter at room temperature. High dielectric performance in the nanocomposites was realized through large enhancement in polarization response at high electric fields. Changes in polymer microstructure was also induced by the nanofillers. The dielectric permittivity of the nanoparticles was determined by impedance spectroscopy, using an appropriate equivalent circuit model.

Original languageEnglish (US)
Pages (from-to)217-221
Number of pages5
JournalAdvanced Materials
Issue number2
StatePublished - Jan 12 2009

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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