Preparation of Nanostrip V2O5 by the Polyol Method and Its Electrochemical Characterization as Cathode Material for Rechargeable Lithium Batteries

Ragupathy, P and Shivakumara, S and Vasan, HN and Munichandraiah, N (2008) Preparation of Nanostrip V2O5 by the Polyol Method and Its Electrochemical Characterization as Cathode Material for Rechargeable Lithium Batteries. In: Journal of Physical Chemistry C, 112 (42). pp. 16700-16707.

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Abstract

The synthesis of pure nanostrip orthorhombic V2O5 was carried out by a simple two-step procedure, with the formation of a vanadyl ethylene glycolate precursor and postcalcination treatment. The precursor and the final product were characterized for its phase and composition by powder X-ray diffraction, infrared spectroscopy, thermal analysis, and X-ray photoelectron spectroscopy. The morphological changes were investigated using field emission scanning electron microscopy and transmission electron microscopy. It was found that the individual strips have around the following dimensions: length, 1.3 mu m; width,332 nm; thickness, 45 nm. The electrochemical lithium intercalation and deintercalation of nanostrip V2O5 was investigated by cyclic voltammetry, galvanostatic charge-discharge cycling, galvanostatic intermittent titration technique, and electrochemical impedance spectroscopy. From charge-discharge cycling, the initial discharge capacity of the nanostrip was found to be about 427 mAh g(-1). However,it decreased due to inherent phase changes on repeated cycling.

Item Type:	Journal Article
Publication:	Journal of Physical Chemistry C
Publisher:	American Chemical Society
Additional Information:	Copyright of this article belongs to American Chemical Society.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	20 May 2009 05:08
Last Modified:	19 Sep 2010 04:53
URI:	http://eprints.iisc.ac.in/id/eprint/16766

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