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Vanadium Oxide Nanowire–Carbon Nanotube Binder-Free Flexible Electrodes for Supercapacitors

  1. Sanjaya D. Perera1,
  2. Bijal Patel1,
  3. Nour Nijem2,
  4. Katy Roodenko2,
  5. Oliver Seitz1,
  6. John P. Ferraris1,
  7. Yves J. Chabal2,
  8. Kenneth J. Balkus Jr.1,*

Article first published online: 16 SEP 2011

DOI: 10.1002/aenm.201100221

Issue

Advanced Energy Materials

Advanced Energy Materials

Volume 1, Issue 5, pages 936–945, October, 2011

Additional Information

How to Cite

Perera, S. D., Patel, B., Nijem, N., Roodenko, K., Seitz, O., Ferraris, J. P., Chabal, Y. J. and Balkus, K. J. (2011), Vanadium Oxide Nanowire–Carbon Nanotube Binder-Free Flexible Electrodes for Supercapacitors. Adv. Energy Mater., 1: 936–945. doi: 10.1002/aenm.201100221

Author Information

  1. 1

    Department of Chemistry and the Alan G. MacDiarmid Nanotech Institute, 800 West Campbell Rd, University of Texas at Dallas, Richardson, TX 75080, USA

  2. 2

    Laboratory for Surface and Nanostructure Modification, Department of Material Science and Engineering, 800 West Campbell Rd, University of Texas Dallas, Richardson, TX 75080, USA

*Department of Chemistry and the Alan G. MacDiarmid Nanotech Institute, 800 West Campbell Rd, University of Texas at Dallas, Richardson, TX 75080, USA.

Publication History

  1. Issue published online: 16 SEP 2011
  2. Article first published online: 16 SEP 2011
  3. Manuscript Revised: 25 JUN 2011
  4. Manuscript Received: 26 APR 2011

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Keywords:

  • carbon nanotubes;
  • composite paper electrodes;
  • flexible electrodes;
  • supercapacitors;
  • vanadium oxide nanowires

Abstract

Vanadium pentoxide (V2O5) layered nanostructures are known to have very stable crystal structures and high faradaic activity. The low electronic conductivity of V2O5 greatly limits the application of vanadium oxide as electrode materials and requires combining with conducting materials using binders. It is well known that the organic binders can degrade the overall performance of electrode materials and need carefully controlled compositions. In this study, we develop a simple method for preparing freestanding carbon nanotube (CNT)-V2O5 nanowire (VNW) composite paper electrodes without using binders. Coin cell type (CR2032) supercapacitors are assembled using the nanocomposite paper electrode as the anode and high surface area carbon fiber electrode (Spectracarb 2225) as the cathode. The supercapacitor with CNT-VNW composite paper electrode exhibits a power density of 5.26 kW Kg−1 and an energy density of 46.3 Wh Kg−1. (Li)VNWs and CNT composite paper electrodes can be fabricated in similar manner and show improved overall performance with a power density of 8.32 kW Kg−1 and an energy density of 65.9 Wh Kg−1. The power and energy density values suggest that such flexible hybrid nanocomposite paper electrodes may be useful for high performance electrochemical supercapacitors.

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