Self-Healable Reprocessable Triboelectric Nanogenerators Fabricated with Vitrimeric Poly(hindered Urea) Networks

Twinkal Patel, Minsoo P. Kim, Junyoung Park, Tae Hee Lee, Pothanagandhi Nellepalli, Seung Man Noh, Hyun Wook Jung, Hyunhyub Ko, Jung Kwon Oh

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

In recent years, the advent of highly deformable and healable electronics is exciting and promising for next-generation electronic devices. In particular, self-healable triboelectric nanogenerators (SH-TENGs) serve as promising candidates based on the combination of the triboelectric effect, electrostatic induction, and self-healing action. However, the majority of SH-TENGs have been devised with weak polymeric networks that are healed with reversible supramolecular interactions or disulfides, thus resulting in poor mechanical properties and low resistance to creeping. To address this issue, we demonstrate the integration of mechanically strong and self-healable poly(hindered urea) (PHU) network in the fabrication of effective TENGs. The designed PHU network is flexible but shows greater mechanical property of tensile strength as high as 1.7 MPa at break. The network is capable of self-healing quickly and repeatedly as well as being reprocessable under mild conditions, enabling the recovery of triboelectric performances after the complete healing of the damaged surfaces. Furthermore, the interfacial-polarization-induced enhancement of dielectric constant endows our SH-TENG with the highest triboelectric output performance (169.9 V/cm2) among the reported healable TENGs. This work presents an avenue to the development of mechanical energy-harvesting devices and self-powered sensors with excellent stretchability, high recoverability, and good mechanical strength.

Original languageEnglish
Pages (from-to)11442-11451
Number of pages10
JournalACS nano
Volume14
Issue number9
DOIs
Publication statusPublished - 2020 Sep 22

Keywords

  • dynamic bulky urea chemistry
  • interfacial polarization
  • poly(hindered urea)
  • reprocessability
  • self-healing
  • triboelectric device

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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