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Title: Enhanced dielectric properties due to space charge-induced interfacial polarization in multilayer polymer films

Abstract

We report that with the recent advancement of power electronics, polymer film capacitors have become increasingly important. However, the low temperature rating (up to 85 °C) and low energy density (5 J cm -3 at breakdown) of state-of-the-art biaxially oriented polypropylene (BOPP) films have been limiting factors for advanced power electronics. Based on our recent work, multilayer films (MLFs), which consist of a high energy density polymer [e.g., poly(vinylidene fluoride) (PVDF)] and a high breakdown/low loss polymer [e.g., polycarbonate (PC)], have shown potential to achieve high energy density (13–17 J cm -3), enhanced breakdown strength, high temperature tolerance, and low loss simultaneously. In this study, the dielectric properties of PC/PVDF 50/50 32- and 256-layer (32L and 256L) films were investigated. The breakdown strength of the 32L film was as high as 800 MV m -1 at room temperature, as compared to 600 MV m -1 of PVDF and 750 MV m-1 of PC. The temperature rating of the 32L film reached 120 °C, higher than that of BOPP. In addition, it was observed that the 32L film with thicker PC layers exhibited a higher breakdown strength and a lower DC conductivity than the 256L film with thinner PC layers atmore » elevated temperatures. These differences were attributed to the difference in the interfacial polarization of space charges, which was further verified by thermally stimulated depolarization current spectroscopy. In conclusion, we conclude that interfacial polarization endows MLFs with the desirable dielectric properties for next generation film capacitors.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [2];  [2];  [1]; ORCiD logo [1]
  1. Case Western Reserve Univ., Cleveland, OH (United States). Center for Layered Polymeric Systems (CLiPS) and Department of Macromolecular Science and Engineering
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1430873
Report Number(s):
[BNL-203427-2018-JAAM]
[Journal ID: ISSN 2050-7526; JMCCCX; TRN: US1802925]
Grant/Contract Number:  
[SC0012704]
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Materials Chemistry C
Additional Journal Information:
[ Journal Volume: 5; Journal Issue: 39]; Journal ID: ISSN 2050-7526
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Chen, Xinyue, Tseng, Jung-Kai, Treufeld, Imre, Mackey, Matthew, Schuele, Donald E., Li, Ruipeng, Fukuto, Masafumi, Baer, Eric, and Zhu, Lei. Enhanced dielectric properties due to space charge-induced interfacial polarization in multilayer polymer films. United States: N. p., 2017. Web. doi:10.1039/C7TC03653A.
Chen, Xinyue, Tseng, Jung-Kai, Treufeld, Imre, Mackey, Matthew, Schuele, Donald E., Li, Ruipeng, Fukuto, Masafumi, Baer, Eric, & Zhu, Lei. Enhanced dielectric properties due to space charge-induced interfacial polarization in multilayer polymer films. United States. doi:10.1039/C7TC03653A.
Chen, Xinyue, Tseng, Jung-Kai, Treufeld, Imre, Mackey, Matthew, Schuele, Donald E., Li, Ruipeng, Fukuto, Masafumi, Baer, Eric, and Zhu, Lei. Fri . "Enhanced dielectric properties due to space charge-induced interfacial polarization in multilayer polymer films". United States. doi:10.1039/C7TC03653A. https://www.osti.gov/servlets/purl/1430873.
@article{osti_1430873,
title = {Enhanced dielectric properties due to space charge-induced interfacial polarization in multilayer polymer films},
author = {Chen, Xinyue and Tseng, Jung-Kai and Treufeld, Imre and Mackey, Matthew and Schuele, Donald E. and Li, Ruipeng and Fukuto, Masafumi and Baer, Eric and Zhu, Lei},
abstractNote = {We report that with the recent advancement of power electronics, polymer film capacitors have become increasingly important. However, the low temperature rating (up to 85 °C) and low energy density (5 J cm-3 at breakdown) of state-of-the-art biaxially oriented polypropylene (BOPP) films have been limiting factors for advanced power electronics. Based on our recent work, multilayer films (MLFs), which consist of a high energy density polymer [e.g., poly(vinylidene fluoride) (PVDF)] and a high breakdown/low loss polymer [e.g., polycarbonate (PC)], have shown potential to achieve high energy density (13–17 J cm-3), enhanced breakdown strength, high temperature tolerance, and low loss simultaneously. In this study, the dielectric properties of PC/PVDF 50/50 32- and 256-layer (32L and 256L) films were investigated. The breakdown strength of the 32L film was as high as 800 MV m-1 at room temperature, as compared to 600 MV m-1 of PVDF and 750 MV m-1 of PC. The temperature rating of the 32L film reached 120 °C, higher than that of BOPP. In addition, it was observed that the 32L film with thicker PC layers exhibited a higher breakdown strength and a lower DC conductivity than the 256L film with thinner PC layers at elevated temperatures. These differences were attributed to the difference in the interfacial polarization of space charges, which was further verified by thermally stimulated depolarization current spectroscopy. In conclusion, we conclude that interfacial polarization endows MLFs with the desirable dielectric properties for next generation film capacitors.},
doi = {10.1039/C7TC03653A},
journal = {Journal of Materials Chemistry C},
number = [39],
volume = [5],
place = {United States},
year = {2017},
month = {9}
}

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