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. 21, 2016
Filed:
Apr. 05, 2013
Dominique Guyomard, Sautron, FR;
Joel Gaubicher, Nantes, FR;
Marc Deschamps, Quimper, FR;
Matthieu Dubarry, Nantes, FR;
Benoit Morel, Champagne Mouton, FR;
Dominique Guyomard, Sautron, FR;
Joel Gaubicher, Nantes, FR;
Marc Deschamps, Quimper, FR;
Matthieu Dubarry, Nantes, FR;
Benoit Morel, Champagne Mouton, FR;
BATSCAP, Odet Ergue-Gaberic, FR;
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris, FR;
Abstract
The invention relates to a lithium vanadium oxide which corresponds to the formula LiVO(0.1≦α≦0.25). It is composed of agglomerates of small needles having a length l from 400 to 1000 nm, a width w such that 10<l/w<100 and a thickness t such that 10<l/t<100. It is obtained by a process consisting in preparing a precursor gel by bringing α-VOand a Li precursor into contact in amounts such that the ratio of the concentrations [VO]/[Li] is between 1.15 and 1.5 and in subjecting the gel to a heat treatment comprising a first stage at 80° C.-150° C. for 3 h to 15 days and a second stage between 250° C. and 350° C. for 4 min to 1 hour, under a nitrogen or argon atmosphere. It is useful as an active material of a positive electrode.