Highly enhanced energy density induced by hetero-interface in sandwich-structured polymer nanocomposites

Penghao Hu, Jianjun Wang, Yang Shen, Yuhan Guan, Yuanhua Lin, Ce Wen Nan

Research output: Contribution to journalArticlepeer-review

78 Scopus citations

Abstract

A novel sandwich-structured polymer-based nanocomposite with different dielectric fillers stacked together was fabricated employing a layer-by-layer casting process. In the sandwich-structured composite poly(vinylidene fluoride)-based film, the outer layer with TiO2 nanoparticles increased the electric displacement while the central layer with paraelectric BaSrTO3 nanofibers maintained the high breakdown strength. Compared with single layer films, the extractable energy density was greatly enhanced in the sandwich-structured film. Instead of solely being stored at the interface between the dielectrics and the electrodes as in a conventional capacitor, charges are also stored at the additional interfaces between the two heterofilm layers within the multilayer dielectric nanocomposite. A numerical simulation was performed to solve the electrostatic equilibrium equation and then to obtain the scenario of charge storage at the hetero interfaces inside the nanocomposite.

Original languageEnglish (US)
Pages (from-to)12321-12326
Number of pages6
JournalJournal of Materials Chemistry A
Volume1
Issue number39
DOIs
StatePublished - Oct 21 2013

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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