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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 (Ud) 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.
摘要：
环氧树脂(EP),作为一种介电聚合物，具有低固化收缩率的优点，高绝缘性能,和良好的热/化学稳定性，广泛应用于电子电器行业。然而,EP制备过程的复杂性限制了其在储能领域的实际应用。在这份手稿中,通过简单的热压方法，成功地将双酚F环氧树脂（EPF）制成厚度为10〜15μm的聚合物薄膜。发现改变EP单体/固化剂的比例会显著影响EPF的固化程度,这导致了击穿强度和储能性能的提高。特别是,对于EP单体/固化剂比为1的EPF薄膜，在600MV·m-1的电场下获得6.5J·cm-3的高放电能量密度（Ud）和86％的效率（η）通过在130°C下热压，这表明热压方法可以方便地生产具有优异储能性能的优质EP薄膜，用于脉冲功率电容器。
