材料科学
复合材料
聚偏氟乙烯
复合数
电介质
静电纺丝
储能
聚合物
光电子学
量子力学
物理
功率(物理)
作者
Yang Cui,Tiandong Zhang,Yu Feng,Changhai Zhang,Qingguo Chi,Yongquan Zhang,Qingguo Chen,Xuan Wang,Qingquan Lei
标识
DOI:10.1016/j.compositesb.2019.107429
摘要
In this study, the ferroelectric polyvinylidene fluoride (PVDF) blended with linear dielectric polymethyl methacrylate (PMMA) is chosen as polymer matrix (named as PMMA/PVDF). The effect of PMMA content and differently structured fillers on the microstructures and electrical properties of PMMA/PVDF-based composites have been investigated. The inorganic 0.5Ba(Zr0.2Ti0.8)O3- 0.5(Ba0.7Ca0.3)TiO3 fibers (abbreviated as BCZT), BCZT embedded with Ag particles (BCZT+Ag), and core-shell structured [email protected]2O3 fibers as fillers were designed and prepared by electrospinning technology. As the insulating Al2O3 shell layer could relieve the dielectric difference between the BCZT and polymer matrix and confine the mobility of carriers provided by Ag, the energy storage density and efficiency are 4.02 J/cm3 and 78.0% for the 3 vol% [email protected]2O3/40% PMMA/PVDF composites at an electric field of 320 kV/mm. To further improve the energy storage properties of the single-layered composites, the sandwich-structured composite films have been designed to improve the breakdown strength. The results show that the energy storage density and efficiency of sandwich-structured composite film with 40 wt% PMMA/PVDF as outer layer and 3 vol% [email protected]2O3/40% PMMA/PVDF as inter layer are 9.6 J/cm3 and 69.8%, respectively, at an electric field of 400 kV/mm. This work presents an effective way to improve the energy storage properties of inorganic/polymer composites.
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