Polar-fluoropolymer blends for high energy density low loss capacitor applications

Shan Wu, Minren Lin, David S.G. Lu, Qiming Zhang

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

    1 Scopus citations


    Besides energy density, the electric loss at high electric fields is another major concern for many capacitor applications. This paper presents recent works in developing high energy density low loss polymer capacitors. In order to reduce the dielectric loss while maintaining high energy density in poly(vinylidene fluoride-hexafluoropropylene) P(VDF-HFP) and P(VDF-CTFE) (CTFE: Chlorotrifluoroethylene) based polymers, a polymer blend approach was investigated. We show that by blending P(VDF-CTFE) with a proper low loss polymer such as poly(ethylene-chlorotrifluoroethylene) (ECTFE) can lead to marked improvement in the loss of dielectric films. In this study, P(VDF-CTFE) blends films with different wt% of ECTFE have been examined to find a balance between dielectric constant and the loss. In addition, crosslink in the blends has been employed to further improve the dielectric performance of the blends. The results indicate that these blends exhibit an excellent performance: relatively high dielectric constant (- 6-7) and low loss (- 0.01) at 1 kHz. For the crosslink blend films, the high field loss is reduced to below 5% with a discharged energy density 4.3 J/cm3 under a field of 300 MV/m.

    Original languageEnglish (US)
    Title of host publicationPolymer-Based Materials and Composites - Synthesis, Assembly, Properties and Applications
    Number of pages6
    StatePublished - 2011
    Event2010 MRS Fall Meeting - Boston, MA, United States
    Duration: Nov 29 2010Dec 3 2010

    Publication series

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


    Other2010 MRS Fall Meeting
    Country/TerritoryUnited States
    CityBoston, MA

    All Science Journal Classification (ASJC) codes

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


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