Energy storage media is the kernel for the rapidly developing new energy systems, while it remains a challenge to achieve admirable service capability at high temperature. This manuscript purposes crosslinking as an effective method to address the issue. The epoxy is innovatively studied as energy storage media in this research. We figure out that crosslinking density is a critical factor to determine its energy storage performance. With adequate crosslinking, attractive energy storage density/efficiency (6.9 J/cm³/90%@room temperature; 1.2 J/cm³/90% and 1.7 J/cm³/75%@100°C) can be achieved. However, excessive crosslinking density and lack of crosslinking point are found to induce obvious energy storage performance decaying at high electric field and high temperature, respectively. This manuscript demonstrates that the general epoxy materials can be used as energy storage media and concludes that proper crosslinking can improve the energy storage performance of polymers, which provides directions for future research on high‐temperature energy storage films.

中文翻译：

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柔性环氧膜：适度交联可增强高温储能性能

能量存储介质是快速发展的新能源系统的核心，而在高温下实现令人钦佩的服务能力仍然是一个挑战。该手稿旨在将交联作为解决该问题的有效方法。在本研究中，对环氧树脂进行了创新的研究，将其作为储能介质。我们发现交联密度是决定其储能性能的关键因素。具有足够的交联性，有吸引力的储能密度/效率（室温下为6.9 J / cm ³ /90%；1.2 J / cm ³ /90％和1.7 J / cm ³/ 75％@ 100°C）。然而，发现过高的交联密度和缺乏交联点分别导致明显的能量存储性能在高电场和高温下衰减。该手稿证明了常规的环氧材料可以用作储能介质，并得出结论，适当的交联可以改善聚合物的储能性能，这为高温储能膜的未来研究提供了方向。