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High dielectric constant and low dielectric loss in poly(vinylidene fluoride) nanocomposites via a small loading of two-dimensional Bi2Te3@Al2O3 hexagonal nanoplates

Abstract

Two-dimensional (2D) core-shell structure Bi2Te3@Al2O3 nanoplates were synthesized from 2D Bi2Te3 nanoplates by sol-gel method, where the 2D Bi2Te3 nanoplates were prepared via microwave-assisted method. Homogeneous nanocomposites films, composed of poly(vinylidene fluoride) (PVDF) as polymeric matric and Bi2Te3 nanoplates or core–shell structured Bi2Te3@Al2O3 nanoplates as fillers, have prepared. The dielectric behaviors have been investigated for Bi2Te3/PVDF and Bi2Te3@Al2O3/PVDF nanocomposites. Compared with Bi2Te3/PVDF nanocomposites, the Bi2Te3@Al2O3/PVDF composites films exhibits larger breakdown strength and lower dielectric loss due to the highly insulating Al2O3 shell layer as well as its proper dielectric constant incorporated into the Bi2Te3 nanoplates surface. As a result, the composites films loading with 10 vol.% 2D Bi2Te3@Al2O3 nanoplates exhibits a high dielectric constant of 140 and relatively low dielectric loss of 0.05 at 1kHz. Furthermore, finite element simulations were carried out to understand the dielectric mechanism of the Al2O3 shell layer effects on the dielectric performances with nanocomposite films. This study provides a solution for obtaining high-k dielectric composite with low dielectric loss, which is highly desired application in power systems and advanced electronics.

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Publication details

The article was received on 18 Oct 2017, accepted on 30 Nov 2017 and first published on 30 Nov 2017


Article type: Paper
DOI: 10.1039/C7TC04758D
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
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    High dielectric constant and low dielectric loss in poly(vinylidene fluoride) nanocomposites via a small loading of two-dimensional Bi2Te3@Al2O3 hexagonal nanoplates

    J. Chen, X. Wang, X. Yu, L. Yao, Z. Duan, Y. Fan, Y. Jiang, Y. Zhou and Z. Pan, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC04758D

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