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Simultaneously enhanced energy density and discharge efficiency of layer-structured nanocomposites by reasonably designing dielectric differences between BaTiO3@SiO2/PVDF layers and BNNSs/PVDF-PMMA layers

  • Qinzhao Sun
  • , Jiping Wang
  • , Haonan Sun
  • , Liqiang He
  • , Lixue Zhang
  • , Pu Mao
  • , Xiaoxiao zhang
  • , Fang Kang
  • , Zepeng Wang
  • , Ruirui Kang
  • , Lin Zhang
  • Xi'an Jiaotong University
  • Nanchang Hangkong University

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

The enhancement of the energy density and efficiency for polymer-based nanocomposites is advantageous for promoting their practical application in miniaturization and integration of dielectric capacitors. In this work, a class of newly designed layer-structured polymer-based nanocomposites based on BaTiO3@SiO2/PVDF dielectric layer as the central layer and BNNSs/PVDF-PMMA layers as the outer layers were prepared. By reasonably adjusting the dielectric properties of a BaTiO3@SiO2/PVDF dielectric layers and BNNSs/PVDF-PMMA insulating layers, the layer-structured nanocomposites exhibits simultaneously high discharge density of 20.1 J/cm3 and high efficiency of 76% under an electric field of 507 MV/m. A series of dielectric analyses and simulation results indicate that the appropriate dielectric differences redistribute the electric filed in the layer-structured nanocomposites, which relieves the electric field strength in the dielectric layer and enhances the electric breakdown strength of nanocomposites. This work can provide an effect strategy to design polymer-based nanocomposites with significantly energy storage performance.

Original languageEnglish
Article number106546
JournalComposites Part A: Applied Science and Manufacturing
Volume149
DOIs
StatePublished - Oct 2021

Keywords

  • A. Polymer-based nanocomposites (PMCs)
  • A. Thin films
  • B. Electrical properties
  • Dielectric differences

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