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Aromatic Polythiourea with Ultrahigh Breakdown Strength for High Energy Density and Low Loss Capacitor Applications

Published online by Cambridge University Press:  22 March 2013

Shan Wu
Affiliation:
Department of Electrical Engineering and the Materials Research Institute The Pennsylvania State University, University Park, PA 16802, USA
Quinn Burlingame
Affiliation:
Department of Electrical Engineering and the Materials Research Institute The Pennsylvania State University, University Park, PA 16802, USA
Weiping Li
Affiliation:
Department of Electrical Engineering and the Materials Research Institute The Pennsylvania State University, University Park, PA 16802, USA
Minren Lin
Affiliation:
Department of Electrical Engineering and the Materials Research Institute The Pennsylvania State University, University Park, PA 16802, USA
Yue Zhou
Affiliation:
Department of Electrical Engineering and the Materials Research Institute The Pennsylvania State University, University Park, PA 16802, USA
Qin Chen
Affiliation:
GE Global Research Center Niskayuna, NY 12309, USA
Andrew Payzant
Affiliation:
Center for Nanophase Materials Sciences, Oak Ridge National Laboratory Oak Ridge, TN 37831, USA
Kai Xiao
Affiliation:
Center for Nanophase Materials Sciences, Oak Ridge National Laboratory Oak Ridge, TN 37831, USA
Qiming Zhang
Affiliation:
Department of Electrical Engineering and the Materials Research Institute The Pennsylvania State University, University Park, PA 16802, USA
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Abstract

Dielectric capacitors for energy storage are of great importance in modern electronics and electric systems. It is a challenge to realize the high energy density while maintain the low dielectric loss. We investigated an ultra high breakdown electric field of 1.1 GV/m, which is approaching the intrinsic breakdown, in aromatic polythiourea, a new dielectric material that serves a high energy density of 23 J/cm3 as well as high charge-discharge efficiency above 90%. The molecular structure and film surface morphology were also studied, it was proved a polar amorphous phase and glass state material could significantly suppress the high field conduction to several orders smaller compared with regular polymer dielectric materials, which are usually semi-crystalline and in rubber phase.

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Articles
Copyright
Copyright © Materials Research Society 2013

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References

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