Phase-Field Model of Electrothermal Breakdown in Flexible High-Temperature Nanocomposites under Extreme Conditions

Zhong Hui Shen, Jian Jun Wang, Jian Yong Jiang, Yuan Hua Lin, Ce Wen Nan, Long Qing Chen, Yang Shen

Research output: Contribution to journalArticle

31 Scopus citations

Abstract

Polymer-based dielectrics are attracting increasing attention due to their high-density energy storage. However, mitigating the heat generation in real capacitors has been a challenge. Here an electrothermal breakdown phase-field model is developed to fundamentally understand the thermal effects on the dielectric breakdown of polymer-based dielectrics in real capacitor configurations including the increase in the dielectric loss and the decrease in the breakdown strength. While both enhancing the thermal conductivity and reducing the electrical conductivity of the polymer nanocomposites can reduce the thermal effects, it is found that reducing the electrical conductivity is more effective. This work is expected to not only stimulate attention to the thermal effects in polymer-based dielectrics but also provide a fundamental guidance to mitigate the heat-induced deterioration of breakdown strength.

Original languageEnglish (US)
Article number1800509
JournalAdvanced Energy Materials
Volume8
Issue number20
DOIs
StatePublished - Jul 16 2018

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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