高储能陶瓷/聚偏氟乙烯复合电介质的研究进展

介电电容器作为间歇产生的可持续能源的高效存储转换设备，在新能源领域发挥着不可替代的作用。而电介质电容器的核心是具有高储能密度的电介质材料。聚合物电介质材料由于具有击穿场强高、放电速度快、能长时间使用并可自修复等特点，成为高性能电容器的潜力候选材料，但聚合物本身较低的介电常数限制了其储能密度。通过将具有高介电常数的陶瓷填料与聚偏氟乙烯(PVDF)聚合物复合，制备新型陶瓷/PVDF复合电介质，在提高电介质材料的介电性能和储能密度方面取得了重要进展。本文介绍了电介质材料的基本原理，综述了不同类型的陶瓷/PVDF复合电介质的结构、储能机制及介电储能性能，并对其未来发展趋势进行了展望。 

Research progress of high-energy-density ceramic/poly(vinylidene fluoride) composite dielectrics

As sustainable energy storage and convert device, dielectric capacitors play a non-substitutable role in the sustainable energy systems. The dielectrics are the core of dielectric capacitors. The polymer dielectrics have great potential to be applied in the high energy density capacitors for their high breakdown strength, fast discharge rate and excellent cyclability with self-healing property but the low dielectric constant. The mposite dielectrics combining ceramic counterparts with high dielectric constant and poly(vinylidene fluoride)(PVDF)-based copolymers with high breakdown strength have been developed, which achieved high energy density, low loss and high efficiency. This review introduces the fundamental principles of dielectrics and different types of ceramic/PVDF-based copolymers composites, their development trends are also prospected.