Structure and Capacitive Properties of Porous Nanocrystalline VN Prepared by Temperature-Programmed Ammonia Reduction Of V2O5

Glushenkov, A.M., Hulicova-Jurcakova, D., Llewellyn, D., Lu, G.Q. and Chen, Y. (2010) Structure and Capacitive Properties of Porous Nanocrystalline VN Prepared by Temperature-Programmed Ammonia Reduction Of V2O5. Chemistry of Materials, 22 3: 914-921. doi:10.1021/cm901729x


Author Glushenkov, A.M.
Hulicova-Jurcakova, D.
Llewellyn, D.
Lu, G.Q.
Chen, Y.
Title Structure and Capacitive Properties of Porous Nanocrystalline VN Prepared by Temperature-Programmed Ammonia Reduction Of V2O5
Journal name Chemistry of Materials   Check publisher's open access policy
ISSN 0897-4756
Publication date 2010-02-09
Year available 2009
Sub-type Article (original research)
DOI 10.1021/cm901729x
Volume 22
Issue 3
Start page 914
End page 921
Total pages 8
Editor Leonard V Interrante
Place of publication United States
Publisher American Chemical Society
Collection year 2010
Language eng
Subject C1
850602 Energy Storage (excl. Hydrogen)
100708 Nanomaterials
Formatted abstract
Vanadium nitride (VN) is currently one of the most promising materials for electrodes of supercapacitors. The structure and electrochemical properties of VN synthesized by temperature-programmed NH3 reduction of V2O5 are analyzed in this paper. Vanadium nitride produced via this route has distinctive structural characteristics. VN mimics the shape of the initial V2O5 precursor indicating a pronounced direct attachment of nitride grains. The particles have domains of grains with a preferential orientation (texture). The large volume of pores in VN is represented by the range of 15-110 nm. VN demonstrates capacitive properties in three different types of aqueous electrolytes, 1 M KOH, 1 M H2SO4, and 3 M NaCl, The material has an acceptable rate capability in all electrolytes, showing about 80% of its maximal capacitance at a current load of 1 A/g in galvanostatic charging/discharging experiments. The capacitance of 186 F/g is observed in 1 M KOH electrolyte at 1 A/g. The previously reported negative effect of material loading on the capacitance is significantly suppressed. The observed electrochemical characteristics related to the application of this material in supercapacitors call be correlated with the crystalline structure of the nitride and the composition of its Surface layer.
© 2009 American Chemical Society.
Keyword ELECTROCHEMICAL CAPACITORS
VANADIUM NITRIDE
SUPERCAPACITORS
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
Australian Institute for Bioengineering and Nanotechnology Publications
 
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Created: Wed, 07 Apr 2010, 16:00:02 EST by Sharon Paterson on behalf of Aust Institute for Bioengineering & Nanotechnology