Open AccessHigh energy density polymer nanocomposites with Y‐doped barium strontium titanate nanoparticles as fillers
Author(s) -
Lu YuChen,
Yu Shuhui,
Zeng Xierong,
Sun Rong,
Wong ChingPing
Publication year - 2018
Publication title -
iet nanodielectrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.23
H-Index - 9
ISSN - 2514-3255
DOI - 10.1049/iet-nde.2018.0015
Subject(s) - materials science , nanocomposite , barium titanate , dielectric , polyvinylidene fluoride , composite material , dopant , nanoparticle , strontium titanate , dielectric loss , doping , ceramic , polymer , nanotechnology , optoelectronics
Dielectric nanocomposites with an enhanced energy density are highly desired in modern electronic and electrical power systems. In this study, the authors developed a new flexible dielectric nanocomposite thin film using Y‐doped barium strontium titanate (Y:BST) nanoparticles as fillers and polyvinylidene fluoride as a polymer matrix. The nanocomposites exhibited a high energy density of 11.07 J/cm 3 at 4300 kV/cm with a low filler content. Through the analysis of defect chemistry with X‐ray photoelectron spectroscopy, the dopant Y 3+ occupies A‐site of the perovskite structure, which is associated with the generation of Ba&Sr vacancies and oxygen vacancies for charge compensation. As a result, TiO 6 2– octahedron distortion occurs, which is responsible for the enhanced dielectric permittivity. Meanwhile, the dielectric loss maintains a low level and the breakdown strength increases at a low filler loading, resulting in improved energy density.