High-Energy Density Capacitors using Nanoparticle-Polymer Composite Dielelectrics

ORAL

Abstract

By combining a polymer with a high dielectric strength and nanoparticles with an even higher dielectric constant, we can to explore exchange coupling between the two materials that will result in a material with an optimized dielectric constant and dielectric strength. [J. Li, \textit{Phys. Rev. Lett.} \textbf{90}, 217601 (2003)] We report the results of dielectric characterization of composites consisting of barium titanate and other dielectric nanoparticles embedded in a matrix of copolymers of vinylidene fluoride with trifluoroethylene. Basic measurements are made by creating parallel plate capacitors with aluminum electrodes on glass substrates. Capacitors made by solvent spin coating contain 0{\%} to 50{\%} nanoparticles by weight and have thickness of approximately 100 nm. Dielectric studies examine the relationship between capacitance and electric field, capacitance and temperature, and the pyroelectric response. This work is supported by the Office of Naval Research and the Nebraska Research Initiative.

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Authors

  • Kristin Kraemer

    Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, USA

  • Jiangyu Li

    Department of Mechanical Engineering, University of Washington, USA

  • Lei Zhang

    Department of Mechanical Engineering, University of Washington, USA

  • D.J. Sellmyer

    Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, NE, 68588-0111, USA, Department of Physics and Astronomy and NCMN, University of Nebraska, Lincoln, NE, 68588-0113, Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, USA

  • X. Wei

    Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, USA

  • Stephen Ducharme

    Department of Physics and Astronomy, Nebraska Center for Materials and Nanoscience, University of Nebraska at Lincoln, Physics and Astronomy at University of Nebraska-Lincoln, Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, NE 68588-0111, Dept. of Physics \& Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, USA