Greatly enhanced breakdown strength and energy density in ultraviolet-irradiated polypropylene

IF 3.8 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IET Nanodielectrics Pub Date : 2021-05-12 DOI:10.1049/nde2.12022

Jiayu Chen, Bao-Wen Li, Yi Sun, Pengxiang Zhang, Zhonghui Shen, Xin Zhang, Ce-Wen Nan, Shujun Zhang

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引用次数: 10

Abstract

Polymer dielectrics have drawn great attentions for applications in advanced electronic devices and power grids because of their high breakdown strength, low dielectric loss, and excellent flexibility. However, the low energy density in polymer dielectric capacitors will hinder the continuous miniaturization of electrical systems. In this work, ultraviolet irradiation is demonstrated to greatly enhance the breakdown strength and energy density of polypropylene. Dramatically improved breakdown strength of 867 MV/m and discharged energy density of 8.0 J/cm³, together with the high energy efficiency of >90%, were simultaneously achieved in polypropylene after ultraviolet irradiation. Our research shows that proper ultraviolet irradiation can effectively improve the energy density of polypropylene without sacrificing its high charge-discharge efficiency, being potential for applications in power electronics and pulse electric systems.

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大大提高了紫外线照射聚丙烯的击穿强度和能量密度

聚合物电介质以其高击穿强度、低介电损耗和优异的柔韧性在先进的电子器件和电网中得到了广泛的应用。然而，聚合物介质电容器的低能量密度将阻碍电气系统的持续小型化。在这项工作中，证明了紫外线照射可以大大提高聚丙烯的击穿强度和能量密度。经紫外辐照后，聚丙烯的击穿强度显著提高，达到867 MV/m，放电能量密度达到8.0 J/cm3，能量效率高达90%。研究表明，适当的紫外线照射可以有效地提高聚丙烯的能量密度，而不牺牲其较高的充放电效率，在电力电子和脉冲电气系统中具有潜在的应用前景。

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