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Issue 18, 2013
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Highly deformation-tolerant carbon nanotube sponges as supercapacitor electrodes

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Abstract

Developing flexible and deformable supercapacitor electrodes based on porous materials is of high interest in energy related fields. Here, we show that carbon nanotube sponges, consisting of highly porous conductive networks, can serve as compressible and deformation-tolerant supercapacitor electrodes in aqueous or organic electrolytes. In aqueous electrolytes, the sponges maintain a similar specific capacitance (>90% of the original value) under a predefined compressive strain of 50% (corresponding to a volume reduction of 50%), and retain more than 70% of the original capacitance under 80% strain while the volume normalized capacitance increases by 3-fold. The sponge electrode maintains a stable performance after 1000 large strain compression cycles. A coin-shaped cell assembled with these sponges shows excellent stability over 15 000 charging cycles with negligible degradation after 500 cycles. Our results indicate that carbon nanotube sponges have the potential to fabricate deformable supercapacitor electrodes with stable performance.

Graphical abstract: Highly deformation-tolerant carbon nanotube sponges as supercapacitor electrodes

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Publication details

The article was received on 18 Apr 2013, accepted on 03 Jul 2013 and first published on 11 Jul 2013


Article type: Communication
DOI: 10.1039/C3NR01932B
Citation: Nanoscale, 2013,5, 8472-8479
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    Highly deformation-tolerant carbon nanotube sponges as supercapacitor electrodes

    P. Li, C. Kong, Y. Shang, E. Shi, Y. Yu, W. Qian, F. Wei, J. Wei, K. Wang, H. Zhu, A. Cao and D. Wu, Nanoscale, 2013, 5, 8472
    DOI: 10.1039/C3NR01932B

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