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  • 1
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Characterization of Electrode Materials Based on V2O5 by X-Ray and Photoelectron SpectroscopyThe investigation of various LixV2O5 compounds and V2O5 itself by X-ray and photoelectron spectroscopy resulted in new knowledge about the change of the structure of V2O5 during discharge in positive electrodes of secondary lithium batteries. The structures of the compounds produced by electrochemical reduction of V2O5 in aprotic lithium salt solutions are similar to these received on a chemical way. In the case of overdischarging of LixV2O5 (x 〉 1) the V2p3/2 binding energy is decreased, the change of the lattice becomes irreversible, and the material is after that only uncompletely rechargeable.
    Notes: Durch röntgen- und photoelektronenspektroskopische Untersuchungen an verschiedenen LixV2O5-Verbindungen und an V2O5 wurden weitere Erkenntnisse zur Strukturumwandlung des V2O5 während seiner Entladung in positiven Elektroden von sekundären Lithiumzellen erhalten. Es treten während der elektrochemischen Reduktion des V2O5 in aprotischen Lithiumsalzlösungen ähnliche Strukturen auf wie bei chemisch hergestellten Verbindungen. Im Falle einer Überentladung (x 〉 1) nimmt die V2p3/2-Bindungsenergie ab, die Gitteränderung wird irreversibel und das Material ist danach nur unvollständig wiederaufladbar.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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