The metals chemical states in hydrated vanadium oxides
|Sigitas Mickevicius 1, Vladimir Bondarenka 1, Sergej Grebinskij 1, Henrikas Tvardauskas 1, Sigitas Tamulevicius 2, Mindaugas Andrulevicius 2|
1. Semiconductor Physics Institute, A.Gostauto 11, Vilnius LT-2600, Lithuania
Vanadium pentoxide based xerogels, H2V12O31-y∙nH2O, have been extensively studied over past years because of their particular properties. These materials can be used as reversible cathodes in lithium batteries, electrochromic layers for display devices, host materials for the intercalation of guest species, humidity sensors, starting material for switching elements, and so on. These xerogels have a layered structure where V2O5 chains are bonded by interlayer water, and can intercalate guest ions and molecules.
Partial substitution of vanadium ions by a metal of higher valence (Mo, Cr) in hydrated vanadium oxides leads to a decrease of the electronic part of conductivity. The X-ray photoelectron spectroscopy (XPS) spectra of hydrated vanadium oxides
It was concluded that the appearance of V4+ ions in V2O5-based xerogels is mainly related with the stoichiometry of the samples, while higher valence admixture ions acts only as a diluting component.
Presentation: Poster at E-MRS Fall Meeting 2007, Symposium J, by Sigitas Mickevicius
See On-line Journal of E-MRS Fall Meeting 2007
Submitted: 2007-05-11 09:50 Revised: 2009-06-07 00:44