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Carbon nanotube-based electrodes for flexible supercapacitors

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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.

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Acknowledgements

This project was financially supported by the National Natural Science Foundation of China (Nos. 21631002 and U1632119), the Ministry of Science and Technology of China (No. 2016YFA0201904), and the Jiangsu Natural Science Foundation (No. BK20180002).

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  1. 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

    Sheng Zhu & Yan Li

  2. School of Physical Science and Technology, Center for Energy Conversion Materials & Physics (CECMP), Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, 215006, China

    Jiangfeng Ni

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  1. Sheng Zhu
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Zhu, S., Ni, J. & Li, Y. Carbon nanotube-based electrodes for flexible supercapacitors. Nano Res. 13, 1825–1841 (2020). https://doi.org/10.1007/s12274-020-2729-5

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