Dynamic and Reprocessable Fluorinated Poly(hindered urea) Network Materials Containing Ionic Liquids to Enhance Triboelectric Performance

Pothanagandhi Nellepalli, Minsoo P. Kim, Junyoung Park, Seung Man Noh, Zhibin Ye, Hyun Wook Jung, Hyunhyub Ko, Jung Kwon Oh

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Triboelectric nanogenerators (TENGs), a newly developed energy harvesting device that converts surrounding environmental mechanical stimuli into electricity, have been significantly explored as an ideal long-term power source for electrical devices. Despite recent advances, the development of advanced TENG devices with sufficient outputs to sustainably power electronic devices and rapid self-healability under mild conditions to improve their lifetime and function is highly demanded. Here, we report a robust self-healable and reprocessable TENG fabricated with a covalent adaptive network based on mechanically strong fluorinated poly(hindered urea) (F-PHU) integrated with ionic liquid as an efficient dielectric material to improve its triboelectric efficiency and self-healing capability simultaneously. The synthesis and integration of a well-defined reactive copolymer having both pendant fluorinated and t-butylamino bulky groups are the key to fabricate robust F-PHU networks containing fluorinated dangling chains that can interact with ionic liquids to induce ionic polarization, which raises the dielectric constant and thus increases triboelectric performance. They also are cross-linked with dynamic bulky urea linkages for rapid self-healability and high reprocessability through their reversible exchange reactions at moderate temperatures. The developed ionic F-PHU materials exhibit a high TENG output performance (power density of 173.0 mW/m2) as well as high TENG output recovery upon repairing their surface damages. This work demonstrates that such a synergistic design of triboelectric ionic F-PHU materials could have great potential for applications requiring high-performance and long-lasting energy harvesting.

Original languageEnglish
Pages (from-to)17806-17817
Number of pages12
JournalACS Applied Materials and Interfaces
Volume14
Issue number15
DOIs
Publication statusPublished - 2022 Apr 20

Keywords

  • dynamic/reversible chemistries
  • fluorinated polymer network
  • ionic liquids
  • poly(hindered urea)
  • reprocessability
  • self-healability
  • triboelectric nanogenerator

ASJC Scopus subject areas

  • Materials Science(all)

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