Breakage-resistant hydrogel electrode enables ultrahigh mechanical reliability for triboelectric nanogenerators

Rui Li, Zhenyu Xu, Long Li, Junjie Wei, Wenqin Wang, Zejun Yan, Tao Chen

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

Hydrogel based triboelectric nanogenerators (H-TENGs) are deemed as one of most promising flexible energy harvesting and self-powered systems due to its multifunctionality, but the poor mechanical properties of hydrogel electrode bring a major risk of shortening the service life of H-TENGs in case of huge physical impact. Herein, a durable conductive hydrogel electrode with breakage-resistant capacity is developed utilizing the Hofmeister effect on starch polymers through solvent-exchange strategy. Owing to bundled starch chains within hydrogel, the breakage-resistant hydrogel electrode possesses excellent mechanical reliability, including outstanding modulus, fracture energy, anti-puncture capacity and long-term stability. Furthermore, the reliable hydrogel electrode endows triboelectric nanogenerator with good electrical output performances and superb damage immunity, prolonging its service life under accidental physical impact. More significantly, this fabricated triboelectric nanogenerator shows great potential in high-impact application. This investigation offers a versatile and effective way to design next generation hydrogel-based triboelectric nanogenerator with superior damage immunity and long-service life.

Original languageEnglish
Article number140261
JournalChemical Engineering Journal
Volume454
DOIs
StatePublished - 15 Feb 2023
Externally publishedYes

Keywords

  • Breakage-resistance
  • Hofmeister effect
  • Hydrogel electrodes
  • Mechanical reliability
  • Triboelectric nanogenerators

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