Phase‐Field Model of Electrothermal Breakdown in Flexible High‐Temperature Nanocomposites under Extreme Conditions
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 19, 2018
- Source ID
- 10.1002/aenm.201800509
Entities
People
- Ce‐wen Nan
- Jian‐jun Wang
- Jian‐yong Jiang
- Long‐qing Chen
- Yang Shen
- Yuan‐hua Lin
- Zhong‐hui Shen
Organizations
- Air Force Office of Scientific Research
- National Natural Science Foundation of China
- Pennsylvania State University
- Tsinghua University