Effect of crystal structure on polarization reversal and energy storage of ferroelectric poly(vinylidene fluoride-co-chlorotrifluoroethylene) thin films

Ruixuan Han, Jiezhu Jin, Paisan Khanchaitit, Jingkang Wang, Qing Wang

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

A series of ferroelectric poly(vinylidene fluoride-co- chlorotrifluoroethylene) films with different crystallite sizes have been obtained by varying the film processing conditions. The impact of the crystallite size on the dipole switching and the electric energy density has been systematically studied by the electric displacement-electric field hysteresis loop measurements. The films with smaller crystallite sizes display larger polarizability, as evidenced by higher maximum polarization and lower dipole switching field in the charging process. Small crystals also facilitate fast dipole depolarization during the discharging process. Consequently, superior released energy densities have been achieved in the films containing small sizes of the ferroelectric crystallite domains. On the other hand, large crystallite sizes are beneficial for the dielectric breakdown strength and the Weibull distribution of the breakdown field of the films. This study sheds new fundamental light on the optimization of the crystal structures of the ferroelectric polymers for high electric energy storage applications.

Original languageEnglish (US)
Pages (from-to)1277-1281
Number of pages5
JournalPolymer
Volume53
Issue number6
DOIs
StatePublished - Mar 9 2012

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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