Supported metallocene catalysis for in situ synthesis of high energy density metal oxide nanocomposites

Neng Guo, Sara A. DiBenedetto, Do Kyun Kwon, Lian Wang, Matthew T. Russell, Michael T. Lanagan, Antonio Facchetti, Tobin J. Marks

Research output: Contribution to journalArticle

96 Citations (Scopus)


The 0-3 metal oxide-isotactic polypropylene nanocomposites are synthesized via in situ propylene polymerization using the C2-symmetric metallocene catalyst dichloro[rac-ethylenebisindenyl]zirconium(IV) (EBIZrCl2) immobilized on methylaluminoxane (MAO)-treated barium titanate (BaTiO3) or titanium dioxide (TiO2) nanoparticles. The composite materials are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and 13C nuclear magnetic resonance (NMR) spectroscopy. It is shown that the nanoparticles are homogeneously dispersed in the polyolefin matrices. Electrical measurements reveal nanocomposite leakage current densities of 10-6 to 10-9 A/cm2, permittivities as high as 6.1, and breakdown strengths of ∼4 MV/cm. Energy densities are estimated to be as high as 9.4 J/cm3.

Original languageEnglish
Pages (from-to)766-767
Number of pages2
JournalJournal of the American Chemical Society
Issue number4
Publication statusPublished - Jan 31 2007


ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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