Structural and electrochemical behavior of tungsten oxide obtained by solid state reaction |
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| Affiliation: | 1. Program of Chemistry, Faculty of Science and Technology, Bansomdejchaopraya Rajabhat University, Bangkok 10600, Thailand;2. Department of Applied Chemistry, Faculty of Engineering, Kyushu University, Motooka 744, Nishi-Ku, Fukuoka 819-0395, Japan;1. Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky sq. 2, 162 06 Prague 6, Czech Republic;2. Joint Laboratory of Solid State Chemistry, University of Pardubice, Studentska 95, 532 10 Pardubice, Czech Republic;3. Department of Chemistry, Chung Yuan Christian University, 200 Chung Pei Road, Chung-Li, 320, Taiwan |
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| Abstract: | Tungsten oxides have been used successfully as intercalation compounds of high performance batteries. In this communication we present a new and innovative route to obtain orthorhombic WO3 where the crystallographic structure can be carefully controlled. X-ray diffraction data indicates that a texture is obtained in the [0k0] direction, whereas XPS suggests that the valence of the tungsten atom is + 6. The electrochemical behavior of the oriented sample was studied by chronopotentiometry and its charge–discharge capacity was evaluated. The results showed stable values close to 100 mA h/g after the 70th cycle, which compares favorably to the best know WO3 compounds produced so far. |
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