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Title: Reducing dielectric loss and enhancing electrical insulation for multilayer polymer films by nanoconfined ion transport under high poling electric fields

Abstract

High temperature polar polymers have demonstrated potential for good thermal stability and high dielectric constant at the same time. However, polarization of contaminated impurity ions in polar polymers, even at the ppm level, can significantly increase the dielectric loss at high temperature and low frequencies. One effective strategy to mitigate this problem is to multilayer them with a high temperature nonpolar dielectric polymer to confine impurity ion transport at the nanometer scale. In this study, confined ion transport in high temperature polycarbonate (HTPC)/poly(vinylidene fluoride) (PVDF) multilayer films under high AC electric fields was studied using a direct analytical simulation method. Different from the ion transport under low fields, the ion diffusion model failed to describe the ion transport under high electric fields. An exponential ion distribution profile, which was observed for the DC poling situation, was employed to implement the direct analytical simulation. Confined impurity ion transport under high AC fields was quantitatively understood. As the AC field increased, the mobile ion concentration decreased whereas the diffusion coefficient increased. The decrease of mobile ion concentration was explained by the blockage of impurity ions by the HTPC layers. This knowledge helped in the determination of optimal conditions to polarize impurity ionsmore » from the PVDF layers into the HTPC layers. After cooling below the glass transition temperature of HTPC, polarized impurity ions were locked inside the HTPC layers. As a result, increased discharge efficiency and enhanced electrical insulation (i.e., increased dielectric breakdown strength) were achieved for the polarized multilayer films.« less

Authors:
 [1]; ORCiD logo [1];  [2];  [2];  [3];  [3];  [1];  [1]; ORCiD logo [1]
  1. Case Western Reserve Univ., Cleveland, OH (United States)
  2. PolymerPlus, Valley View, OH (United States)
  3. 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)
OSTI Identifier:
1635475
Alternate Identifier(s):
OSTI ID: 1608380
Report Number(s):
BNL-216089-2020-JAAM
Journal ID: ISSN 2050-7526; JMCCCX
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Materials Chemistry C
Additional Journal Information:
Journal Volume: 8; Journal Issue: 18; 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, Allahyarov, Elshad, Langhe, Deepak, Ponting, Michael, Li, Ruipeng, Fukuto, Masafumi, Schuele, Donald E., Baer, Eric, and Zhu, Lei. Reducing dielectric loss and enhancing electrical insulation for multilayer polymer films by nanoconfined ion transport under high poling electric fields. United States: N. p., 2020. Web. doi:10.1039/D0TC00522C.
Chen, Xinyue, Allahyarov, Elshad, Langhe, Deepak, Ponting, Michael, Li, Ruipeng, Fukuto, Masafumi, Schuele, Donald E., Baer, Eric, & Zhu, Lei. Reducing dielectric loss and enhancing electrical insulation for multilayer polymer films by nanoconfined ion transport under high poling electric fields. United States. doi:10.1039/D0TC00522C.
Chen, Xinyue, Allahyarov, Elshad, Langhe, Deepak, Ponting, Michael, Li, Ruipeng, Fukuto, Masafumi, Schuele, Donald E., Baer, Eric, and Zhu, Lei. Fri . "Reducing dielectric loss and enhancing electrical insulation for multilayer polymer films by nanoconfined ion transport under high poling electric fields". United States. doi:10.1039/D0TC00522C.
@article{osti_1635475,
title = {Reducing dielectric loss and enhancing electrical insulation for multilayer polymer films by nanoconfined ion transport under high poling electric fields},
author = {Chen, Xinyue and Allahyarov, Elshad and Langhe, Deepak and Ponting, Michael and Li, Ruipeng and Fukuto, Masafumi and Schuele, Donald E. and Baer, Eric and Zhu, Lei},
abstractNote = {High temperature polar polymers have demonstrated potential for good thermal stability and high dielectric constant at the same time. However, polarization of contaminated impurity ions in polar polymers, even at the ppm level, can significantly increase the dielectric loss at high temperature and low frequencies. One effective strategy to mitigate this problem is to multilayer them with a high temperature nonpolar dielectric polymer to confine impurity ion transport at the nanometer scale. In this study, confined ion transport in high temperature polycarbonate (HTPC)/poly(vinylidene fluoride) (PVDF) multilayer films under high AC electric fields was studied using a direct analytical simulation method. Different from the ion transport under low fields, the ion diffusion model failed to describe the ion transport under high electric fields. An exponential ion distribution profile, which was observed for the DC poling situation, was employed to implement the direct analytical simulation. Confined impurity ion transport under high AC fields was quantitatively understood. As the AC field increased, the mobile ion concentration decreased whereas the diffusion coefficient increased. The decrease of mobile ion concentration was explained by the blockage of impurity ions by the HTPC layers. This knowledge helped in the determination of optimal conditions to polarize impurity ions from the PVDF layers into the HTPC layers. After cooling below the glass transition temperature of HTPC, polarized impurity ions were locked inside the HTPC layers. As a result, increased discharge efficiency and enhanced electrical insulation (i.e., increased dielectric breakdown strength) were achieved for the polarized multilayer films.},
doi = {10.1039/D0TC00522C},
journal = {Journal of Materials Chemistry C},
number = 18,
volume = 8,
place = {United States},
year = {2020},
month = {5}
}

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