Elastic Conductors for Skin-Tight Wearable Electronics

  • Author: Liam Critchley
  • Published: 10 July 2019
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: ACS Nano/ACS Publications
  • Associated Societies: American Chemical Society (ACS), USA
thumbnail image: Elastic Conductors for Skin-Tight Wearable Electronics

Electrodes which are both soft and flexible are crucial components for skin-tight wearable electronic devices, e.g., in sportswear. Metal-elastomer nanocomposites are a promising material because they are both stretchable and conductive. However, most prototypes to date suffer from poor cycling stability and insufficient long-term durability.


Takao Someya, University of Tokyo and Center for Emergent Matter Science (CEMS), Wako, both Japan, and colleagues have produced nanofiber-reinforced metal–elastomer composite electrodes for skin-tight textiles. The electrodes are composed of silver flakes, a fluoroelastomer matrix (made from DAI-EL G8001), and polyvinylidene fluoride (PVDF) nanofibers. The PVDF nanofibers were prepared using electrospinning. The composite films were fabricated by stencil printing a silver–fluoroelastomer composite ink on the polyvinylidene fluoride (PVDF) nanofiber sheet. The resulting electrodes were integrated into sensors, which were then built into compression-type sportswear.


The nanofibers increase the material's toughness and reduce crack propagation in the electrode. The conductivity was found to be four times higher than in a material without the nanofibers. This effect occurs because the fibers act as a filter for the silver flakes, which arrange in a silver-rich layer on top of the material. The electrode is stretchable by up to 800 % and the cyclic degradation was limited to a relative resistance change of 0.56 after 5,000 cycles.


 

Article Views: 1446

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


CONNECT:

ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter


A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH