5 years ago

Harvesting electrical energy from carbon nanotube yarn twist

Xavier Lepró, Shaoli Fang, Na Li, Shashank Priya, Ray H. Baughman, Tae Jin Mun, Shi Hyeong Kim, Rui Qiao, Zunfeng Liu, Raquel Ovalle-Robles, Julia Bykova, Run Wang, Matthew Steven Lucas, Kyeongjae Cho, Lawrence F. Drummy, Dong Youn Lee, Benji Maruyama, Moon Kim, Prashant Kumar, Young Jun Oh, Carter S. Haines, Seon Jeong Kim, Enlai Gao, Dawood Albarq, Juan Pablo Oviedo, Changsoon Choi, Nan Jiang, Jiangtao Di, Keon Jung Kim

Mechanical energy harvesters are needed for diverse applications, including self-powered wireless sensors, structural and human health monitoring systems, and the extraction of energy from ocean waves. We report carbon nanotube yarn harvesters that electrochemically convert tensile or torsional mechanical energy into electrical energy without requiring an external bias voltage. Stretching coiled yarns generated 250 watts per kilogram of peak electrical power when cycled up to 30 hertz, as well as up to 41.2 joules per kilogram of electrical energy per mechanical cycle, when normalized to harvester yarn weight. These energy harvesters were used in the ocean to harvest wave energy, combined with thermally driven artificial muscles to convert temperature fluctuations to electrical energy, sewn into textiles for use as self-powered respiration sensors, and used to power a light-emitting diode and to charge a storage capacitor.

Publisher URL: http://science.sciencemag.org/cgi/content/short/357/6353/773

DOI: 10.1126/science.aam8771

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.