Method for the preparation of γLiV 2 O 5

Details Method for the preparation of γLiV 2 O 5 Method for the preparation of γLiV 2 O 5

2005-10-18

2010-11-30

Bos, Steven (Department: 1793)

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

C423S179500, C423S265000, C423S414000

Reexamination Certificate

active

07842273

ABSTRACT:
The invention relates to the preparation of an optionally carbonaceous γ-LiV2O5material.The process consists in preparing a composition formed of carbon and of precursors of Li and of V and in subjecting it to a heat treatment. The composition is prepared by bringing carbon, α-V2O5and a Li precursor into contact in amounts such that the ratio of the [V2O5]/[Li] concentrations is between 0.95 and 1.05 and the carbon is in excess of at least 25% with respect to the stoichiometry. The heat treatment is carried out in two stages: a first stage at a temperature between 90° C. and 150° C. for a time of 1 to 12 hours and a second stage at a temperature between 420° C. and 500° C. for a time of between 10 min and 1 hour, under a nitrogen or argon atmosphere or under vacuum.Applications: positive electrode active material.

REFERENCES:
patent: 5512214 (1996-04-01), Koksbang
patent: 6528033 (2003-03-01), Barker et al.
patent: 6716372 (2004-04-01), Barker et al.
patent: 2002/0086214 (2002-07-01), Barker et al.
patent: 0397608 (1990-11-01), None
J. Barker et al., “A Carbothermal Reduction Method for the Preparation of Electroactive Materials for Lithium Ion Application”, Journal of the Electrochemical Society, vol. 150, No. 6, 2003, pp. A684-A688, XP002332263.
International Search Report mailed Mar. 9, 2006.

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