材料科学
电介质
纳米复合材料
钛酸钡
复合材料
聚合物
电容器
聚合物纳米复合材料
功率密度
薄膜电容器
纳米颗粒
铸造
陶瓷
纳米技术
光电子学
电压
功率(物理)
电气工程
工程类
物理
量子力学
作者
Mohsin Ali Marwat,Bing Xie,Yiwei Zhu,Pengyuan Fan,Weigang Ma,Hongming Li,Malik Ashtar,Jianzhong Xiao,David Salamon,Chanatip Samart,Haibo Zhang
标识
DOI:10.1016/j.compositesa.2019.03.016
摘要
The development of flexible film dielectric capacitors with high discharge energy densities is of central significance for advanced electric and electronic power systems. Herein, a novel sandwich structure designed barium titanate/poly(methyl methacrylate) (BT/PMMA) nanocomposites are prepared layer-by-layer using solution casting method. The outer two layers with low BT nanoparticles concentration offered a considerably higher breakdown strength, while the central polarization layer with higher BT nanoparticles concentration presented higher dielectric constant to the nanocomposites. Consequently, 1-9-1 BT/PMMA nanocomposite compared to its single-layered counterpart (i.e. 9 wt% BT/PMMA) showed a ∼238% improvement in discharge energy density (i.e. from 1.8 J/cm3 to 6.08 J/cm3). The discharge rate analysis presented that 1-9-1 BT/PMMA discharges in 2.44 μs with a power density of about 0.5 MW/cm3 at a time constant (τ0.9). This work significantly paves the way for using sandwich-structured linear polymer nanocomposites in high energy density and fast discharge rate dielectrics application.
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