Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/168643
Title: Enhanced electrochemical performance of W incorporated VO2 nanocomposite cathode material for lithium battery application
Authors: Nizar, S. A. Syed 
Ramar, V. 
Venkatesan, T. 
Balaya, P. 
Valiyaveettil, S. 
Keywords: Electrochemical properties
Hydrothermal synthesis
Lattice expansion
Lithium battery
Tungsten
Vanadium oxide
Issue Date: 20-Aug-2018
Publisher: Elsevier Ltd
Citation: Nizar, S. A. Syed, Ramar, V., Venkatesan, T., Balaya, P., Valiyaveettil, S. (2018-08-20). Enhanced electrochemical performance of W incorporated VO2 nanocomposite cathode material for lithium battery application. ELECTROCHIMICA ACTA 282 : 480 - 489. ScholarBank@NUS Repository.
Abstract: We report the synthesis, characterization, and performance evaluation of tungsten (W) incorporated vanadium oxide (VO2) nanocomposite cathode material for improved lithium storage performance. VO2 nanorods, 100�200 nm in diameter and 1�3 ?m in length are synthesized using a hydrothermal method. W incorporation at different weight percent results in the VO2 morphology shifting from rods to a sheet type structure. The lithium storage performance of VO2 has improved remarkably by increasing the loading of W to an optimal level, which influence the intercalation/ deintercalation of lithium ions into the expanded lattices of VO2. The maximum specific capacity observed for the optimal VO2/W4 composite was 381 mAh/g at a current density of 0.1 C. Cyclic voltammetry measurements showed the presence of an electroactive V3+/V4+ redox couple, leading to lower peak separation and voltage polarization differences. Superior charge storage performance was observed with the VO2/W4 composite as compared to the VO2 based devices. � 2018 Elsevier Ltd
Source Title: ELECTROCHIMICA ACTA
URI: https://scholarbank.nus.edu.sg/handle/10635/168643
ISSN: 0013-4686
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