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Review Article

Carbon nanotube-based electrodes for flexible supercapacitors

Sheng Zhu1, Jiangfeng Ni2( ), Yan Li1( )
Beijing National Laboratory for Molecular Sciences, Key Laboratory for the Physics and Chemistry of Nanodevices, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
School of Physical Science and Technology, Center for Energy Conversion Materials & Physics (CECMP), Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou 215006, China
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Graphical Abstract

Abstract

Flexible supercapacitors (SCs) have attracted increasing attention as the power supply unit for portable/wearable electronics. Carbon nanotubes (CNTs) are promising candidate materials for flexible SC electrodes because of their outstanding mechanical property, high electrical conductivity, large surface area, and functionability. CNTs can assemble into various macroscopic materials with different dimensions. In this review, flexible CNT assemblies including 1D fibers, 2D films, and 3D aerogels and sponges are introduced with a focus on the design strategies and fabrication techniques. The recent developments and state-of-the-art applications of such structures as electrodes in flexible SCs are summarized based on device configurations including sandwiched, interdigital in-plane, and cable-type configurations. The flexible CNT-based electrodes have shown great advantages in bendability, stretchability and/or compressibility, as well as a long cycle lifetime. The current challenges and future research opportunities in this field are also discussed.

Keywords

carbon nanotubesnanostructureselectrodesflexiblesupercapacitors

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Nano Research
Volume 13 Issue 7,
July 2020
Pages 1825-1841
DOI: 10.1007/s12274-020-2729-5
Cite this article:
Zhu S, Ni J, Li Y. Carbon nanotube-based electrodes for flexible supercapacitors. Nano Research, 2020, 13(7): 1825-1841. https://doi.org/10.1007/s12274-020-2729-5
Topics:
Nano unitAerogelsElectrodesNanostructuresSupercapacitor
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Received: 29 November 2019
Revised: 13 February 2020
Accepted: 23 February 2020
Published: 31 March 2020
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020
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