Phase‐Field Model of Electrothermal Breakdown in Flexible High‐Temperature Nanocomposites under Extreme Conditions,Advanced Energy Materials

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Phase‐Field Model of Electrothermal Breakdown in Flexible High‐Temperature Nanocomposites under Extreme Conditions
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2018-04-19 , DOI: 10.1002/aenm.201800509
Zhong-Hui Shen ₁ , Jian-Jun Wang ₂ , Jian-Yong Jiang ₁ , Yuan-Hua Lin ₁ , Ce-Wen Nan ₁ , Long-Qing Chen ₂ , Yang Shen _{1,

3}

Affiliation

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.

中文翻译：

极端条件下柔性高温纳米复合材料电热击穿的相场模型

聚合物基电介质由于其高密度储能而引起了越来越多的关注。然而，减轻实际电容器中的发热一直是一个挑战。在这里，开发了一个电热击穿相场模型，以从根本上了解实际电容器配置中聚合物基电介质对电介质击穿的热效应，包括电介质损耗的增加和击穿强度的降低。虽然提高聚合物纳米复合材料的导热率和降低导电率都可以降低热效应，但是发现降低导电率更有效。

更新日期：2018-04-19

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