Artículos de revistas
Structural and electrochemical behavior of tungsten oxide obtained by solid state reaction
Solid State Ionics. Elsevier Science Bv, v. 177, n. 41858, n. 697, n. 701, 2006.
Tunesten 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. (c) 2006 Elsevier B.V. All rights reserved.17741858697701