A Metal-Like Conductive Elastomer with a Hierarchical Wrinkled Structure

Seokmin Lee, Yongkwon Song, Yongmin Ko, Younji Ko, Jongkuk Ko, Cheong Hoon Kwon, June Huh, Sang Woo Kim, Bongjun Yeom, Jinhan Cho

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Abstract

For the development of wearable electronics, the replacement of rigid, metallic components with fully elastomeric materials is crucial. However, current elastomeric electrodes suffer from low electrical conductivity and poor electrical stability. Herein, a metal-like conductive elastomer with exceptional electrical performance and stability is presented, which is used to fabricate fully elastomeric electronics. The key feature of this material is its wrinkled structure, which is induced by in situ cooperation of solvent swelling and densely packed nanoparticle assembly. Specifically, layer-by-layer assembly of metal nanoparticles and small-molecule linkers on elastomers generates the hierarchical wrinkled elastomer. The elastomer demonstrates remarkable electrical conductivity (170 000 and 11 000 S cm−1 at 0% and 100% strain, respectively), outperforming previously reported elastomeric electrodes based on nanomaterials. Furthermore, a fully elastomeric triboelectric nanogenerator based on wrinkled elastomeric electrode exhibits excellent electric power generation performance due to the compressible, large contact area of the wrinkled surface during periodic contact and separation.

Original languageEnglish
Article number1906460
JournalAdvanced Materials
Volume32
Issue number7
DOIs
StatePublished - 2020 Feb 1

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Keywords

  • elastomeric electrodes
  • metal nanoparticles
  • multilayers
  • swelling
  • wrinkled structures

Cite this

Lee, S., Song, Y., Ko, Y., Ko, Y., Ko, J., Kwon, C. H., Huh, J., Kim, S. W., Yeom, B., & Cho, J. (2020). A Metal-Like Conductive Elastomer with a Hierarchical Wrinkled Structure. Advanced Materials, 32(7), [1906460]. https://doi.org/10.1002/adma.201906460