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Enhancing the Dielectric Breakdown Strength of Solid-State Polymer Capacitors by Chain End Manipulations

ORAL

Abstract

The need for high power density, flexible, pulsed power and lightweight energy storage devices requires the use of polymer film-based dielectric capacitors. The maximum energy storage density of a dielectric capacitor is proportional to the square of breakdown voltage. Chain ends contribute adversely to the electrical breakdown of polymer dielectrics at high electric fields. In this work, we enhanced the dielectric breakdown voltage and hence the energy density of the polymer capacitor by using well-ordered high molecular weight block copolymers (BCP), in which the chain ends are segregated to narrow zones. The well-ordered and easily processable BCP capacitors exhibit an energy density more than 5 J/cm3, which is higher than that of industrial used biaxially oriented polypropylene. Cyclic homopolymers (no chain ends) and linear homopolymers having chemistry-controlled chain ends also show enhanced dielectric breakdown strength, resulting in higher energy density compared to linear counterparts. These novel insights into manipulating chain end distribution such as in BCPs and with molecular topology to increase the energy density of polymers will address next-generation energy demands.

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Presenters

  • Alamgir Karim

    University of Houston, Department of Chemical and Biomolecular Engineering, University of Houston, Polymer, NIST, Department of Chemical & Biomolecular Engineering, S333 Engineering, 4726 Calhoun Rd, Houston, TX, University of Houston, Chemical and Biomolecular Engineering, University of Houston

Authors

  • Alamgir Karim

    University of Houston, Department of Chemical and Biomolecular Engineering, University of Houston, Polymer, NIST, Department of Chemical & Biomolecular Engineering, S333 Engineering, 4726 Calhoun Rd, Houston, TX, University of Houston, Chemical and Biomolecular Engineering, University of Houston

  • Maninderjeet Singh

    Department of Chemical and Biomolecular Engineering, University of Houston, Chemical and Biomolecular Engineering, University of Houston

  • Wenjie Wu

    Chemical and Biomolecular Engineering, University of Houston, University of Houston, Department of Chemical and Biomolecular Engineering, University of Houston

  • Mei Dong

    Chemistry, Texas A&M

  • David Tran

    Chemistry, Texas A&M

  • Karen L. Wooley

    Chemistry, Texas A&M, Chemistry, Texas A&M University

  • Nihar Pradhan

    Department of Chemistry, Physics and Atmospheric Science, Jackson, MS, USA, Jackson State University, Physics, Jackson State University

  • Dharmaraj Raghavan

    Department of Chemistry, Howard University, Washington DC 20059, Howard University, Chemistry, Howard University