Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 160, Issue 11, Pages A2195-A2206Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.081311jes
Keywords
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Funding
- National Science Fund [CBET-0933141]
- Edward R. Weidlein Chair Professorship funds
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Nanocrystalline vanadium nitride (VN) has been synthesized using a simple two-step procedure involving mechano-chemical reaction of V2O3 and Li3N mixture induced by high energy mechanical milling (HEMM) followed by washing in water. The crystalline VN thus synthesized has been analyzed as a supercapacitor material in aqueous media. The electrochemical mechanism and material properties influencing the supercapacitor behavior of VN have been explored. The surface properties of the nanocrystalline VN have also been studied using X-ray photo-electron spectroscopy (XPS) and correlated to the electrochemical response. Stable capacitances of upto 60 F/g are reported here for nanocrystalline VN generated using the high energy mechano-chemical reaction method. Cycling induced degradation of capacitance has also been studied and the possible degradation mechanisms have been discussed. (C) 2013 The Electrochemical Society. All rights reserved.
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