材料科学
电介质
电容器
复合材料
介电常数
纳米复合材料
储能
相对介电常数
聚合物
兴奋剂
小型化
光电子学
纳米技术
电气工程
电压
工程类
功率(物理)
物理
量子力学
作者
Yongbin Liu,Jinghui Gao,Ruifeng Yao,Yang Zhang,Tongxin Zhao,Chao Tang
标识
DOI:10.1016/j.matchemphys.2020.123155
摘要
The growing demand for miniaturization of electrical and electronic system poses a great challenge on energy storage capacitors, which requires associated dielectric materials exhibiting high energy density. In ferroelectric polymer dielectrics, it is one of the key issues to achieve both high dielectric permittivity and high breakdown strength. In this paper, we propose a method on improving the dielectric permittivity and breakdown strength concurrently taking the advantage of nanocomposite and blending. Our results show that PVDF/PMMA/TiO2 blending nanodielectric material presents improved relative dielectric permittivity of 12 and breakdown strength of 387 kV/mm compared with pristine PVDF, leading to an enhanced energy density about 5.8 J/cm3 and an efficiency of 77%. Further electric properties measurements and structure characterizations indicate that the moderate enhancement of permittivity can be ascribed to the doping of TiO2 nanoparticles, and the improved breakdown strength is caused by blending of PMMA with good insulating properties. Our results might provide a promising approach to develop high-performance energy-storage dielectric materials concerning the synergistic effect of blending and nanocomposite.
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