The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 30, 2010
Filed:
Oct. 18, 2005
Dominique Guyomard, Sautron, FR;
Joël Gaubicher, Nantes, FR;
Marc Deschamps, Quimper, FR;
Matthieu Dubarry, Honolulu, HI (US);
Benoit Morel, Champagne Mouton, FR;
Dominique Guyomard, Sautron, FR;
Joël Gaubicher, Nantes, FR;
Marc Deschamps, Quimper, FR;
Matthieu Dubarry, Honolulu, HI (US);
Benoit Morel, Champagne Mouton, FR;
Batscap, Ergue-Gaberic, FR;
Centre National de la Recherche Scientifique, Paris, FR;
Abstract
The invention relates to the preparation of an optionally carbonaceous γ-LiVOmaterial. 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-VOand a Li precursor into contact in amounts such that the ratio of the [VO]/[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.