Owing to their excellent dielectric properties and energy storage performance, polymer-based composites have shown great potential in the application of pulse energy storage capacitors and electrostatic capacitors. In this study, BaTiO₃ (BT) particles with different sizes were modified with dopamine to prepare core–shell structured BT particles (PDA@BT), and then the poly(arylene ether nitrile) (PEN)-based PDA@BT/PEN composites were prepared. As a common biological material, dopamine has a variety of functional groups which can be used to improve the compatibility between the fillers and the matrix. Moreover, the movement of the carriers at the interface of the composites is limited and the loss is reduced. The composites with an optimized filler size illustrate a high energy density of 1.37 J/cm³ at 160 kV/mm, which nearly reaches up to the energy density of biaxially oriented polypropylene (BOPP) at low electric field. In addition, the composites have the superior power density of 1.88 MW/cm³ with a fast discharge time of 0.138 μs.

中文翻译：

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多巴胺改性钛酸钡基聚（亚芳基醚腈）基复合材料在低电场下的高功率密度

由于其优异的介电性能和储能性能，聚合物基复合材料在脉冲储能电容器和静电电容器的应用中显示出巨大的潜力。本研究采用多巴胺对不同尺寸的 BaTiO ₃ (BT) 颗粒进行改性制备核壳结构的 BT 颗粒 (PDA@BT)，然后制备聚亚芳基醚腈 (PEN) 基 PDA@BT/PEN制备了复合材料。作为一种常见的生物材料，多巴胺具有多种官能团，可用于提高填料与基体的相容性。此外，载体在复合材料界面处的运动受到限制，从而降低了损耗。具有优化填料尺寸的复合材料具有 1.37 J/cm ^{3的高能量密度}在 160 kV/mm 下，在低电场下几乎达到双向拉伸聚丙烯 (BOPP) 的能量密度。此外，复合材料具有1.88 MW/cm ³的优异功率密度和0.138 μs的快速放电时间。