Strongly Dipolar Polythiourea and Polyurea Dielectrics with High Electrical Breakdown, Low Loss, and High Electrical Energy Density

Shan Wu, Quinn Burlingame, Zhao Xi Cheng, Minren Lin, Qiming Zhang

    Research output: Contribution to journalArticle

    20 Citations (Scopus)

    Abstract

    Dielectric materials with high electric energy density and low loss are of great importance for applications in modern electronics and electrical systems. Strongly dipolar materials have the potential to reach relatively higher dielectric constants than the widely used non-polar or weakly dipolar polymers, as well as a much lower loss than that of nonlinear high K polymer dielectrics or polymer–ceramic composites. To realize the high energy density while maintaining the low dielectric loss, aromatic polythioureas and polyureas with high dipole moments, high dipole densities, tunable molecular structures and dielectric properties were investigated. High energy density (>24 J/cm3), high breakdown strength (>800 MV/m), and high charge–discharge efficiency (>90%) can be achieved in the new polymers. The molecular structure and film surface morphology were also studied; it is of great importance to optimize the fabrication process to make high-quality thin films.

    Original languageEnglish (US)
    Pages (from-to)4548-4551
    Number of pages4
    JournalJournal of Electronic Materials
    Volume43
    Issue number12
    DOIs
    StatePublished - Jan 1 2014

    Fingerprint

    electric power
    electrical faults
    Polymers
    flux density
    Molecular structure
    polymers
    molecular structure
    Dipole moment
    Dielectric losses
    dielectric loss
    Dielectric properties
    Surface morphology
    dielectric properties
    dipole moments
    Permittivity
    Electronic equipment
    breakdown
    permittivity
    dipoles
    Fabrication

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Materials Chemistry
    • Electrical and Electronic Engineering

    Cite this

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    abstract = "Dielectric materials with high electric energy density and low loss are of great importance for applications in modern electronics and electrical systems. Strongly dipolar materials have the potential to reach relatively higher dielectric constants than the widely used non-polar or weakly dipolar polymers, as well as a much lower loss than that of nonlinear high K polymer dielectrics or polymer–ceramic composites. To realize the high energy density while maintaining the low dielectric loss, aromatic polythioureas and polyureas with high dipole moments, high dipole densities, tunable molecular structures and dielectric properties were investigated. High energy density (>24 J/cm3), high breakdown strength (>800 MV/m), and high charge–discharge efficiency (>90{\%}) can be achieved in the new polymers. The molecular structure and film surface morphology were also studied; it is of great importance to optimize the fabrication process to make high-quality thin films.",
    author = "Shan Wu and Quinn Burlingame and Cheng, {Zhao Xi} and Minren Lin and Qiming Zhang",
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    Strongly Dipolar Polythiourea and Polyurea Dielectrics with High Electrical Breakdown, Low Loss, and High Electrical Energy Density. / Wu, Shan; Burlingame, Quinn; Cheng, Zhao Xi; Lin, Minren; Zhang, Qiming.

    In: Journal of Electronic Materials, Vol. 43, No. 12, 01.01.2014, p. 4548-4551.

    Research output: Contribution to journalArticle

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    T1 - Strongly Dipolar Polythiourea and Polyurea Dielectrics with High Electrical Breakdown, Low Loss, and High Electrical Energy Density

    AU - Wu, Shan

    AU - Burlingame, Quinn

    AU - Cheng, Zhao Xi

    AU - Lin, Minren

    AU - Zhang, Qiming

    PY - 2014/1/1

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    AB - Dielectric materials with high electric energy density and low loss are of great importance for applications in modern electronics and electrical systems. Strongly dipolar materials have the potential to reach relatively higher dielectric constants than the widely used non-polar or weakly dipolar polymers, as well as a much lower loss than that of nonlinear high K polymer dielectrics or polymer–ceramic composites. To realize the high energy density while maintaining the low dielectric loss, aromatic polythioureas and polyureas with high dipole moments, high dipole densities, tunable molecular structures and dielectric properties were investigated. High energy density (>24 J/cm3), high breakdown strength (>800 MV/m), and high charge–discharge efficiency (>90%) can be achieved in the new polymers. The molecular structure and film surface morphology were also studied; it is of great importance to optimize the fabrication process to make high-quality thin films.

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