Abstract Flexible dielectric composite films are highly desirable materials with potential application in capacitors due to their high energy density and discharged efficiency. However, agglomeration induced by the large surface energy of nanoparticles and their large dielectric losses are unfavorable to the improvement of energy density. Submicron lead zirconate titanate (PZT) particles have shown great potential as filler in achieving a high energy storage capacity because of their excellent dielectric properties and good dispersion. In this work, calcined PZT particles were used to prepare PZT/polyvinylidene fluoride (PVDF) composite films. The results showed that composite films of high quality could be obtained even with high contents of submicron PZT particles. The introduction of PZT particles significantly improved the dielectric performance of composite films compared with that of the pristine PVDF film. The discharged energy density of composite films with 10 vol% PZT particles achieved 6.41 J/cm3 at 250 kV/mm. A high efficiency of 87.25% was obtained at 50 kV/mm. These findings confirm the feasibility of PZT particles as inorganic filler in composite films for energy storage applications.

中文翻译：

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使用亚微米 PZT 颗粒增强复合薄膜的介电性能和放电能量密度

摘要 柔性介电复合薄膜由于其高能量密度和放电效率而在电容器中具有潜在的应用前景。然而，纳米颗粒较大的表面能引起的团聚及其较大的介电损耗不利于能量密度的提高。亚微米锆钛酸铅 (PZT) 颗粒由于其优异的介电性能和良好的分散性，在实现高储能容量方面显示出巨大的潜力。在这项工作中，煅烧 PZT 颗粒用于制备 PZT/聚偏二氟乙烯 (PVDF) 复合薄膜。结果表明，即使亚微米 PZT 颗粒含量高，也可以获得高质量的复合薄膜。与原始PVDF薄膜相比，PZT颗粒的引入显着提高了复合薄膜的介电性能。具有 10 vol% PZT 颗粒的复合膜的放电能量密度在 250 kV/mm 下达到 6.41 J/cm3。在 50 kV/mm 下获得了 87.25% 的高效率。这些发现证实了 PZT 颗粒在用于储能应用的复合薄膜中作为无机填料的可行性。