Ultrafast charge and discharge biscrolled yarn supercapacitors for textiles and microdevices

Jae Ah Lee, Min Kyoon Shin, Shi Hyeong Kim, Hyun U. Cho, Geoffrey M. Spinks, Gordon G. Wallace, Márcio D. Lima, Xavier Lepró, Mikhail E. Kozlov, Ray H. Baughman and Seon Jeong Kim ()
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Jae Ah Lee: Hanyang University
Min Kyoon Shin: Hanyang University
Shi Hyeong Kim: Hanyang University
Hyun U. Cho: Hanyang University
Geoffrey M. Spinks: ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong
Gordon G. Wallace: ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, University of Wollongong
Márcio D. Lima: The Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas
Xavier Lepró: The Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas
Mikhail E. Kozlov: The Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas
Ray H. Baughman: The Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas
Seon Jeong Kim: Hanyang University

Nature Communications, 2013, vol. 4, issue 1, 1-8

Abstract: Abstract Flexible, wearable, implantable and easily reconfigurable supercapacitors delivering high energy and power densities are needed for electronic devices. Here we demonstrate weavable, sewable, knottable and braidable yarns that function as high performance electrodes of redox supercapacitors. A novel technology, gradient biscrolling, provides fast-ion-transport yarn in which hundreds of layers of conducting-polymer-infiltrated carbon nanotube sheet are scrolled into ~20 μm diameter yarn. Plying the biscrolled yarn with a metal wire current collector increases power generation capabilities. The volumetric capacitance is high (up to ~179 F cm−3) and the discharge current of the plied yarn supercapacitor linearly increases with voltage scan rate up to ~80 V s−1 and ~20 V s−1 for liquid and solid electrolytes, respectively. The exceptionally high energy and power densities for the complete supercapacitor, and high cycle life that little depends on winding or sewing (92%, 99% after 10,000 cycles, respectively) are important for the applications in electronic textiles.

Date: 2013
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DOI: 10.1038/ncomms2970

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