Enhancing the Dielectric Breakdown Strength of Solid-State Polymer Capacitors by Chain End Manipulations
ORAL
Abstract
The need for high power density, flexible and light weight energy storage devices requires the use of polymer film-based dielectric capacitors. Theoretically, it has been shown that chain ends contribute adversely to electrical breakdown, resulting in low energy density in polymer capacitors. In this work, we enhanced the energy density of polymer capacitor by using well-ordered high molecular weight block copolymer (BCP), in which the chain ends are segregated to narrow zones. Cyclic homopolymers (no chain ends) and linear homopolymers having chemistry-controlled chain ends also show enhanced breakdown strength, resulting in higher energy density as compared to the 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 be helpful for fulfilling next-generation energy demands.
*The authors would like to acknowledge NSF HBCU-UP EiR NSF DMR # 1900692 and NSF DMR# 1905996 grants for funding this research
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Presenters
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Alamgir Karim
- Chemical and Biomolecular Engineering, University of Houston
- Univ of Houston
- University of Houston
- Department of Chemical and Biomolecular Engineering, University of Houston
- Department of Chemical and Biomolecular Engineering, Univ of Houston
- University of Houston-Main Campus