Vanadium pentoxide thin films used as positive electrode in lithium microbatteries: An XPS study during cycling
| Autor: | Alain Levasseur, Hervé Martinez, Anass Benayad, Danielle Gonbeau, Astrid Gies, Brigitte Pecquenard |
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| Přispěvatelé: | Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB), LABORATOIRE DE CHIMIE THEORIQUE ET PHYSICO-CHIMIE MOLECULAIRE (LCTPCM), Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2006 |
| Předmět: |
Electochemical properties
Materials science genetic structures Thin films Analytical chemistry Vanadium chemistry.chemical_element 02 engineering and technology Electrolyte 010402 general chemistry 01 natural sciences 7. Clean energy Vanadium oxide Surface properties Pentoxide General Materials Science Thin film Argon [CHIM.MATE]Chemical Sciences/Material chemistry General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Lithium battery 0104 chemical sciences Amorphous solid Photoelectron spectroscopy chemistry Chemical engineering Plasma deposition 0210 nano-technology |
| Zdroj: | Journal of Physics and Chemistry of Solids Journal of Physics and Chemistry of Solids, Elsevier, 2006, 67 (5-6), pp.1320-1324. ⟨10.1016/j.jpcs.2006.01.089⟩ |
| ISSN: | 0022-3697 |
| DOI: | 10.1016/j.jpcs.2006.01.089 |
| Popis: | International audience; Vanadium pentoxide thin films, usable as positive electrode in microbatteries, have been prepared by radio frequency magnetron sputtering in a pure argon or mixed argon/oxygen atmosphere using a V2O5 target. Depending on the oxygen partial pressure in the discharge gas, we have obtained either crystallized or amorphous thin films, with different morphologies. These two kinds of thin films having different electrochemical behavior, an extensive XPS study was carried out. The main redox processes and their reversibility occurring during the 1st, 10th, and 30th discharge–charge cycles were discussed in relation with the electrochemical properties. Our results have revealed a good reversibility of the redox process for amorphous thin films and degradation for crystallized ones, in agreement with the discharge capacity evolution. Furthermore, the growth of a surface layer between the cathode and the liquid electrolyte was evidenced upon the discharge as well as its partial dissolution upon the charge. |
| Databáze: | OpenAIRE |
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