Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/92961
Title: A new form of vanadium oxide for use as a cathode material in lithium batteries
Authors: Dai, J.
Li, S.F.Y. 
Gao, Z. 
Siow, K.S. 
Keywords: Cathode materials
Lithium batteries
Vanadium oxide
Issue Date: 15-Jul-1998
Source: Dai, J.,Li, S.F.Y.,Gao, Z.,Siow, K.S. (1998-07-15). A new form of vanadium oxide for use as a cathode material in lithium batteries. Journal of Power Sources 74 (1) : 40-45. ScholarBank@NUS Repository.
Abstract: A new form of vanadium oxide, (Na2O)0.23V2O5, is synthesised by precipitation of sol and removing water. Its performance as a cathode material is studied by chronopotentiometry and cyclic voltammetry. A capacity of more than 220 mA h g-1 can be obtained in 12 cycles when the voltage is from 3.8 to 1.8 V. Its capacity and cyclability are satisfactory in comparison with other forms of vanadium oxide and synthesis is relatively easy. X-ray diffraction (XRD) studies show that (Na2O)0.23V2O5 is quasi-tetragonal crystal after heating at a temperature below 250°C. The crystallites of (Na2O)0.23V2O5 are in platelet form, and their dimensions are less than 2 μm. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) studies found that the sol-precipitate, (Na2O)0.23V2O5 · xH2O, can lose water at 200°C. © 1998 Elsevier Science S.A. All rights reserved.
Source Title: Journal of Power Sources
URI: http://scholarbank.nus.edu.sg/handle/10635/92961
ISSN: 03787753
Appears in Collections:Staff Publications

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