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Vanadium pentoxide nanobelts: One pot synthesis and its lithium storage behavior

Nagaraju, Ganganagappa and Chithaiahb, Pallellappa and Ashokac, Siddaramanna and Mahadevaiah, Narayanappa (2012) Vanadium pentoxide nanobelts: One pot synthesis and its lithium storage behavior. In: CRYSTAL RESEARCH AND TECHNOLOGY, 47 (8). pp. 868-875.

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Official URL: http://dx.doi.org/10.1002/crat.201200122


In this paper, we report a synthesis, characterization and electrochemical properties of V2O5 nanobelts. V2O5 nanobelts have been prepared via hydrothermal treatment of commercial V2O5 in acidic (HCl/H2SO4) medium at relatively low temperature (160 degrees C). The hydrothermally derived products have been characterized by powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, X-ray photo electron spectroscopy (XPS), UV-Vis spectroscopy, Scanning/Transmission electron microscopy (SEM/TEM). XRD pattern of V2O5 nanobelts show an orthorhombic phase. From the FTIR spectrum, the peak observed at 1018 cm-1 is characteristic of the stretching vibration mode of the terminal vanadyl, V = O. The UV-Vis absorption spectrum of V2O5 nanobelts show maximum absorbance at 430 nm, which was blue-shifted compared to that of bulk V2O5. TEM micrographs reveal that the products consist of nanobelts of 40-200 nm in thickness and several tens of micrometers in length. The electrochemical analysis shows an initial discharge capacity of 360 mAh g-1 and its almost stabilized capacity is reached to 250 mAh g-1 after 55 cycles. A probable reaction mechanism for the formation of orthorhombic V2O5 nanobelts is proposed.

Item Type: Journal Article
Keywords: vanadium pentoxide; hydrothermal; nanobelts; li ion battery
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Francis Jayakanth
Date Deposited: 10 Sep 2012 12:21
Last Modified: 10 Sep 2012 12:21
URI: http://eprints.iisc.ac.in/id/eprint/44999

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