Synthesis, Characterization and lithium Intercalation behavior of electrodeposited V2O5

Vanadium pentoxide deposits have been prepared by electrochemical oxidation of vanadyl ions in aqueous solution. They were characterized with the use of a combination of techniques including: X-ray diffraction, TGA, SEM, chemical titration... They exhibit a 2D structure similar to that of V 2 O 5 ge...

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Bibliographic Details
Published in:Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals Molecular crystals and liquid crystals, 1998-03, Vol.311 (1), p.75-80
Main Authors: Potiron, Emmanuel, Salle, Annie Le Gal La, Guyomard, Dominique, Piffard, Yves
Format: Article
Language:English
Subjects:
Chemistry
electrochemical Li intercalation
electrodeposition
Elements and non-metal compounds (oxides, hydroxides, hydrides, sulfides, carbides, ...)
Exact sciences and technology
Inorganic chemistry and origins of life
physico-chemical characterization
Preparations and properties
Vanadium pentoxide
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Summary:Vanadium pentoxide deposits have been prepared by electrochemical oxidation of vanadyl ions in aqueous solution. They were characterized with the use of a combination of techniques including: X-ray diffraction, TGA, SEM, chemical titration... They exhibit a 2D structure similar to that of V 2 O 5 gels and contain the same number of exchangeable protons and water molecules per formula unit. However clear differences are also observed, mainly related to the V 4+ content, the interlayer distance and their evolution with thermal treatments. The electrochemical behavior of as prepared and heat treated electrodeposited materials was investigated with respect to lithium intercalation. A thermal treatment at T>140°C induces an irreversible decrease of the V 4+ content and leads to a higher specific capacity.
ISSN:1058-725X
DOI:10.1080/10587259808042369