Communication

Fast and Reversible Surface Redox Reaction in Nanocrystalline Vanadium Nitride Supercapacitors†

  1. D. Choi1,
  2. G. E. Blomgren3,
  3. P. N. Kumta1,2

Article first published online: 6 APR 2006

DOI: 10.1002/adma.200502471

Issue

Advanced Materials

Advanced Materials

Volume 18, Issue 9, pages 1178–1182, May, 2006

Additional Information

How to Cite

Choi, D., Blomgren, G. E. and Kumta, P. N. (2006), Fast and Reversible Surface Redox Reaction in Nanocrystalline Vanadium Nitride Supercapacitors. Adv. Mater., 18: 1178–1182. doi: 10.1002/adma.200502471

Author Information

  1. 1

    Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA

  2. 2

    Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, USA

  3. 3

    Blomgren Consulting Services Limited, Lakewood, OH 44107, USA

  1. †

    We thank Tom Nuhfer of Carnegie Mellon University and Wayne Jennings of Case Western Reserve University for their assistance in HRTEM and XPS analysis, respectively. This work was supported by the Carnegie Mellon University and the National Science Foundation (Grants CTS-0000563). Supporting Information is available online at Wiley InterScience or from the author.

Publication History

  1. Issue published online: 24 APR 2006
  2. Article first published online: 6 APR 2006
  3. Manuscript Accepted: 20 JAN 2006
  4. Manuscript Received: 17 NOV 2005

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Keywords:

  • Nanocomposites;
  • Nanocrystals;
  • Nitrides;
  • Redox activity;
  • Supercapacitors
Thumbnail image of graphical abstract

Modification of the surface chemistry of nanocrystalline VN yields a new class of supercapacitors that deliver an impressive specific capacitance. The creation of surface nanolayers of VOx (poor electronic conductivity) on the electronically conductive nanocrystalline VN shown in the figure and on the cover gives rise to a series of reversible redox reactions that are thought to be responsible for the high capacitance. Application of the concept to other transition metals is expected to broaden the scope of supercapacitor materials.

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