Aromatic polyurea for high temperature high energy density capacitors

Yong Wang, Xin Zhou, Minren Lin, Sheng Guo Lu, Junhong Lin, Qiming Zhang

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Scopus citations

    Abstract

    We investigate aromatic polyureas which can be fabricated in the form of thin films through CVD. It was found that the polymer possesses a flat dielectric response (k∼ 4.2 and loss <1%)) to more than 200°C The frequency-independent dielectric properties in the investigated frequency range(1kHz∼1MHz), low conductance, low dissipation factor (∼0.005), high breakdown strength (>800MV/m), high energy density (>12J/cm3) and high efficiency suggest this polymer can be a good candidate material for high temperature energy storage capacitors. Breakdown strength was analyzed with Weibull model over a broad temperature range (25°C ∼180°C). Experimental results indicate that aromatic polyurea is more like a nonpolar linear dielectric material because of its highly cross-linked structures. The experiment results further show that this polymer maintains its high performance even at high temperatures.

    Original languageEnglish (US)
    Title of host publicationMaterials Research Society Symposium Proceedings - Polymer-Based Smart Materials - Processes, Properties and Application
    Pages179-184
    Number of pages6
    StatePublished - Sep 1 2008
    Event2008 MRS Fall Meeting: Polymer-Based Smart Materials - Processes, Properties and Application - Boston, MA, United States
    Duration: Dec 2 2008Dec 5 2008

    Publication series

    NameMaterials Research Society Symposium Proceedings
    Volume1134
    ISSN (Print)0272-9172

    Other

    Other2008 MRS Fall Meeting: Polymer-Based Smart Materials - Processes, Properties and Application
    CountryUnited States
    CityBoston, MA
    Period12/2/0812/5/08

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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