Excellent Energy Storage Performance in Epoxy Resin Dielectric Polymer Films by a Facile Hot-Pressing Method

Zhe Pan; Minmin Mao; Bin Zhang; Zhongyu Li; Kaixin Song; Hai-Feng Li; Zhu Mao; Dawei Wang

doi:10.3390/polym15102315

Excellent Energy Storage Performance in Epoxy Resin Dielectric Polymer Films by a Facile Hot-Pressing Method

Polymers (Basel). 2023 May 15;15(10):2315. doi: 10.3390/polym15102315.

Authors

Zhe Pan^{1

2}, Minmin Mao¹, Bin Zhang^{2

3}, Zhongyu Li², Kaixin Song¹, Hai-Feng Li⁴, Zhu Mao², Dawei Wang⁵

Affiliations

¹ College of Electronics Information, Hangzhou Dianzi University, Hangzhou 310018, China.
² Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
³ School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710119, China.
⁴ Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macao SAR 999078, China.
⁵ School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin 150080, China.

Abstract

Epoxy resin (EP), as a kind of dielectric polymer, exhibits the advantages of low-curing shrinkage, high-insulating properties, and good thermal/chemical stability, which is widely used in electronic and electrical industry. However, the complicated preparation process of EP has limited their practical applications for energy storage. In this manuscript, bisphenol F epoxy resin (EPF) was successfully fabricated into polymer films with a thickness of 10~15 μm by a facile hot-pressing method. It was found that the curing degree of EPF was significantly affected by changing the ratio of EP monomer/curing agent, which led to the improvement in breakdown strength and energy storage performance. In particular, a high discharged energy density (U_d) of 6.5 J·cm^-3 and efficiency (η) of 86% under an electric field of 600 MV·m^-1 were obtained for the EPF film with an EP monomer/curing agent ratio of 1:1.5 by hot pressing at 130 °C, which indicates that the hot-pressing method could be facilely employed to produce high-quality EP films with excellent energy storage performance for pulse power capacitors.

Keywords: capacitor; epoxy resin; hot pressing; polymer film.

Grants and funding

This work was supported by the National Natural Science Foundation of China (51602147), the Natural Science Foundation of Jiangsu Higher Education Institutions of China (16KJB430017), and the Science and Technology Development Fund, Macao SAR (File Nos. 0051/2019/AFJ and 0090/2021/A2).