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:
Jul. 08, 2008
Filed:
Oct. 08, 2002
Séverine Jouanneau, Saint Barthélémy d'Anjou, FR;
Dominique Guyomard, Sautron, FR;
Annie Le Gal LA Salle, La Chapelle sur Erdre, FR;
Alain Verbaere, La Chapelle sur Erdre, FR;
Stéphane Lascaud, Fontainebleau, FR;
Nelly Bourgeon, Saint-Herblain, FR;
Marc Deschamps, Quimper, FR;
Séverine Jouanneau, Saint Barthélémy d'Anjou, FR;
Dominique Guyomard, Sautron, FR;
Annie Le Gal La Salle, La Chapelle sur Erdre, FR;
Alain Verbaere, La Chapelle sur Erdre, FR;
Stéphane Lascaud, Fontainebleau, FR;
Nelly Bourgeon, Saint-Herblain, FR;
Marc Deschamps, Quimper, FR;
Centre National de la Recherche Scientifique, Paris, FR;
Abstract
A lithium and vanadium oxide is described having the formula LiVO, wherein 0.1≦×≦0.25. The oxide has a monoclinic crystalline structure and comprises non-agglomerated grains in the form of monocrystalline pellets having a length L of between 1 and 100 μm, a width W such that 4<L/W<100, and a thickness t such that 4 L/t<100, with t<W, the elongation axis of the pellets being axis b of the monoclinic cell. The oxide may be prepared by mixing the Li and V precursors, without grinding or compression, heating said mixture to 565° C.-585° C. and de-agglomerating the product obtained. The oxide is suitable for use as an active material for the positive electrode of a lithium battery.