A superior nanolaminate dielectric barrier coating for high breakdown strength

  • Boya Zhang
  • , Zongze Li
  • , Ming Ren
  • , Jingjing Liu
  • , Thomas Moran
  • , Bryan Huey
  • , Luyi Sun
  • , Yang Cao

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

11 Scopus citations

Abstract

Exfoliated montmorillonite nanosheets were self-Assembled with poly(vinyl alcohol) on the surface of polymer films to form an organic/inorganic hybrid nanocoating. It was experimentally demonstrated that the highly oriented and aligned laminates of the nanocoating has a remarkable positive effect on the breakdown strength of the substrate polymer films including polyethylene, polystyrene and Kapton®. The improvement is attributed to the geometric confinement of the multilayer structure within the coating, which forms barriers to prevent the charge injecting into the polymer bulk and dissipate charge laterally. Pre-breakdown conduction measurement revealed that the coated polystyrene and Kapton films showed highly suppressed resistive current and higher inception field for charge injection compared with the blank films. Besides, biased-probe-induced charge injection into the film and the subsequent surface charge decay were investigated by Kelvin probe force microscopy, indicating a significantly suppressed charge injection in coated films which then dissipated away much faster. These barrier effects of the nanocoating provide a promising solution to increase the energy density of polymer capacitor films by increasing their breakdown strength without altering their intrinsic properties.

Original languageEnglish
Title of host publicationCEIDP 2017 - IEEE Conference on Electrical Insulation and Dielectric Phenomenon
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages461-464
Number of pages4
ISBN (Electronic)9781538611944
DOIs
StatePublished - 1 Jul 2017
Externally publishedYes
Event2017 IEEE Conference on Electrical Insulation and Dielectric Phenomenon, CEIDP 2017 - Texas, United States
Duration: 22 Oct 201725 Oct 2017

Publication series

NameAnnual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
Volume2017-October
ISSN (Print)0084-9162

Conference

Conference2017 IEEE Conference on Electrical Insulation and Dielectric Phenomenon, CEIDP 2017
Country/TerritoryUnited States
CityTexas
Period22/10/1725/10/17

Keywords

  • Barrier
  • Breakdown strength
  • Kelvin probe force microscopy
  • Montmorillonite
  • Nanocoating
  • Polymer film

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