Origin of enhanced piezoelectric energy harvesting in all-polymer-based core–shell nanofibers with controlled shell-thickness

Ju Han, Ji Ho Kim, Hong Je Choi, Seung Won Kim, Sun Min Sung, Min Sung Kim, Bo Kyoung Choi, Jong Hoo Paik, Joon Seok Lee, Yong Soo Cho

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Polymer nanofiber-based piezoelectric composites have been actively investigated as ideal energy generators for low-power-consuming electronic devices. Herein, we introduce a core–shell nanofiber-based piezoelectric energy harvester consisting of poly (vinylidene fluoride-trifluoroethylene (P(VDF-TrFE)) as a piezoelectric shell and poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) as a conductive core, which was optimized primarily by adjusting the relative shell thickness. The thinnest shell layer exhibited the best output performance, i.e., ~8.76 V and ~547 nA, which correspond to the 10-fold and 5-fold increases relative to the reference values for only P(VDF-TrFE) nanofibers. Almost doubled performance of ~13.2 V and ~950 nA was further achieved by connecting two harvesters in series and parallel, respectively. Origin of the harvesting enhancements was believed to be associated with extra space-charge polarization and the content of β-phase. The core-shell devices were also successfully demonstrated as tactile sensors to electrically detect various body motions.

Original languageEnglish
Article number109141
JournalComposites Part B: Engineering
Volume223
DOIs
Publication statusPublished - 2021 Oct 15

Bibliographical note

Publisher Copyright:
© 2021 Elsevier Ltd

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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