Fluorinated Covalent Organic Framework as a Positive Tribo-Material for High-Performance Triboelectric Nanogenerators

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13 Scopus citations


Along with the increasingly wide application of intelligent electronics, triboelectric nanogenerator (TENG), as a promising sustainable micro-power source has attracted considerable attention recently. However, most of the reported research focuses on negative triboelectric materials, while research on alternative positive tribo-layers is still limited. In this study, a new highly fluorinated covalent organic framework (COF) Tp-TFAB is successfully synthesized and utilized as positive triboelectric materials for high-performance TENGs. Unusually, compared with the non-fluorinated Tp-TAPB COF, both the pristine Tp-TFAB COF and corresponding hybrid films with polyvinyl alcohol (PVA) based TENGs demonstrate much higher triboelectric performance. Especially, a PVC-PVA/FTC TENG composed of polyvinyl chloride (PVC) and hybrid PVA/Tp-TFAB (PVA/FTC) films reveal much superior triboelectric performance with a short-circuit current density of 26.34 mA m−2, a transferred charge density of 148.5 µC m−2, and a maximum peak power density of 8.24 W m−2, nearly six times higher than that of the PVC-PVA TENG. Detailed investigations revealed that the fluorinated Tp-TFAB COF has enhanced electron donating ability, which significantly boosts the triboelectric output of TENGs. This study provides an effective strategy of chemically designing and synthesizing new alternative triboelectric materials, which will pave the way to significantly enhance the triboelectric performance of TENGs.

Original languageEnglish (US)
Article number2212891
JournalAdvanced Functional Materials
Issue number12
StatePublished - Mar 16 2023

Bibliographical note

Funding Information:
L.S. and V.S.K. contributed equally to this work. The research reported in this manuscript was funded by the King Abdullah University of Science and Technology (KAUST) under competitive research grant number OSR‐CRG2017‐3379.

Publisher Copyright:
© 2023 Wiley-VCH GmbH.


  • covalent organic frameworks
  • electron transfers
  • fluorination
  • triboelectric nanogenerators

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Chemistry(all)
  • Biomaterials
  • Materials Science(all)
  • Condensed Matter Physics
  • Electrochemistry


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