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:
Jun. 29, 2010
Filed:
Oct. 18, 2005
Dominique Guyomard, Sautron, FR;
Joël Gaubicher, Nantes, FR;
Marc Deschamps, Quimper, FR;
Matthieu Dubarry, Honolulu, HI (US);
Philippe Moreau, Saint Mars du Désert, FR;
Dominique Guyomard, Sautron, FR;
Joël Gaubicher, Nantes, FR;
Marc Deschamps, Quimper, FR;
Matthieu Dubarry, Honolulu, HI (US);
Philippe Moreau, Saint Mars du Désert, FR;
Batscap, Ergue-Gaberic, FR;
Centre National de la Recherche Scientifique, Paris, FR;
Abstract
The invention relates to a nanostructured material. The material is a nanostructured carbonaceous material composed of agglomerates of small needles of LiVOand of β-LiVO(0.1≦α≦0.25 and 0.03≦x≦0.667) surrounded by a noncontinuous layer of spherical carbon particles. It is obtained by a process consisting in preparing a carbonaceous precursor gel by bringing carbon, α-VOand a Li precursor into contact in amounts such that the ratio of the [VO]/[Li] concentrations is between 1.15 and 1.5 and that the (carbon)/(carbon+VO+Li precursor) ratio by weight is from 10 to 15 and in subjecting the gel to a heat treatment comprising a 1st stage at 80° C.-150° C. for 3-12 h and a 2nd stage between 300° C. and 350° C. for 10 min to 1 hour, under an nitrogen or argon atmosphere. Applications: positive electrode active material.