Pan Zhe, Mao Minmin, Zhang Bin, Li Zhongyu, Song Kaixin, Li Hai-Feng, Mao Zhu, Wang Dawei
College of Electronics Information, Hangzhou Dianzi University, Hangzhou 310018, China.
Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
Polymers (Basel). 2023 May 15;15(10):2315. doi: 10.3390/polym15102315.
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 () of 6.5 J·cm and efficiency () of 86% under an electric field of 600 MV·m 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.
环氧树脂（EP）作为一种介电聚合物，具有固化收缩率低、绝缘性能高以及良好的热/化学稳定性等优点，在电子电气行业中广泛应用。然而，EP复杂的制备工艺限制了其在能量存储方面的实际应用。在本论文中，通过简便的热压法成功制备出了厚度为10~15μm的双酚F环氧树脂（EPF）聚合物薄膜。研究发现，改变EP单体/固化剂的比例会显著影响EPF的固化程度，进而提高其击穿强度和能量存储性能。特别是，通过在130°C下热压制备的EP单体/固化剂比例为1:1.5的EPF薄膜，在600 MV·m的电场下获得了6.5 J·cm的高放电能量密度（）和86%的效率（），这表明热压法可简便地用于制备具有优异能量存储性能的高质量EP薄膜，用于脉冲功率电容器。
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