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.
Fast and Reversible Surface Redox Reaction in Nanocrystalline Vanadium Nitride Supercapacitors†
Article first published online: 6 APR 2006
Copyright © 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Volume 18, Issue 9, pages 1178–1182, May, 2006
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
- Issue published online: 24 APR 2006
- Article first published online: 6 APR 2006
- Manuscript Accepted: 20 JAN 2006
- Manuscript Received: 17 NOV 2005
- Redox activity;
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.