Structure and capacitive properties of porous nanocrystalline VN produced by NH3 reduction of V2O5

Glushenkov, Alexey M., Hulicova-Jurcakova, Denisa, Llewellyn, David, Lu, Gao Qing and Chen, Ying 2010, Structure and capacitive properties of porous nanocrystalline VN produced by NH3 reduction of V2O5, Chemistry of materials, vol. 22, no. 3, pp. 914-921.

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Title Structure and capacitive properties of porous nanocrystalline VN produced by NH3 reduction of V2O5
Formatted title Structure and capacitive properties of porous nanocrystalline VN produced by NH3 reduction of V2O5
Author(s) Glushenkov, Alexey M.
Hulicova-Jurcakova, Denisa
Llewellyn, David
Lu, Gao Qing
Chen, Ying
Journal name Chemistry of materials
Volume number 22
Issue number 3
Start page 914
End page 921
Total pages 8
Publisher American Chemical Society
Place of publication Washington D.C.
Publication date 2010
ISSN 0897-4756
1520-5002
Summary 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 can be correlated with the crystalline structure of the nitride and the composition of its surface layer.
Language eng
Field of Research 100708 Nanomaterials
Socio Economic Objective 970110 Expanding Knowledge in Technology
HERDC Research category C1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30035406

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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