A highly porous nonwoven thermoplastic polyurethane/polypropylene-based triboelectric nanogenerator for energy harvesting by human walking

Hyun Ju Oh, Jong Hyuk Bae, Young Ki Park, Jinkyu Song, Do Kun Kim, Woosung Lee, Minhee Kim, Ki Joon Heo, Yoonjin Kim, Seong Hun Kim, Byeong Jin Yeang, Seung Ju Lim

Research output: Contribution to journalArticle

Abstract

A highly porous nonwoven thermoplastic polyurethane (TPU)/Polypropylene (PP) triboelectric nanogenerator (N-TENG) was developed. To fabricate the triboelectric layers, the TPU nanofiber was directly electrospun onto the nonwoven PP at different basis weights (15, 30, and 50 g/m2). The surface morphologies and porosities of the nonwoven PP and TPU nanofiber mats were characterized by field-emission scanning electron microscopy and porosimetry. The triboelectric performance of the nonwoven TPU/PP based TENG was found to improve with an increase in the basis weight of nonwoven PP. The maximum output voltage and current of the TPU/PP N-TENG with 50% PP basis weight reached 110.18 ± 6.06 V and 7.28 ± 0.67 μA, respectively, due to high air volume of nonwoven without spacers. In order to demonstrate its practical application as a generator, a TPU/PP N-TENG-attached insole for footwear was fabricated. The N-TENG was used as a power source to turn on 57 light-emitting diodes through human-walking, without any charging system. Thus, owing to its excellent energy-conversion performance, simple fabrication process, and low cost, the breathable and wearable nonwoven fiber-based TENG is suitable for large-scale production, to be used in wearable devices.

Original languageEnglish
Article number1044
JournalPolymers
Volume12
Issue number5
DOIs
StatePublished - 2020 May 1

Keywords

  • Breathable
  • Mass production
  • Nanofiber
  • Polypropylene
  • Porous nonwoven
  • Spacer-free
  • Thermoplastic polyurethane
  • Triboelectric nanogenerator

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    Oh, H. J., Bae, J. H., Park, Y. K., Song, J., Kim, D. K., Lee, W., Kim, M., Heo, K. J., Kim, Y., Kim, S. H., Yeang, B. J., & Lim, S. J. (2020). A highly porous nonwoven thermoplastic polyurethane/polypropylene-based triboelectric nanogenerator for energy harvesting by human walking. Polymers, 12(5), [1044]. https://doi.org/10.3390/POLYM12051044