C - Chemistry – Metallurgy – 01 – G
Patent
C - Chemistry, Metallurgy
01
G
C01G 53/00 (2006.01) C01G 45/00 (2006.01) C01G 49/00 (2006.01) C01G 51/00 (2006.01) H01M 4/48 (2006.01)
Patent
CA 2281586
The invention relates to a method for producing lithium transition metalates of the general formula (I): Li x(M1y M2 1-y)n O nx, where M1 represents nickel, cobalt or manganese; M2 represents chromium, cobalt, iron, manganese, molybdenum and/or aluminum and is not equal to M1; n is equal to 2 if M1 = Mn, and 1 in all other cases; x is a number between 0.9 and 1.2; y is a number between 0.5 and 1.0; and z is a number between 1.9 and 2.1. According to the method, an intimate solid mixture is produced of oxygen-containing compounds of the transition metals and oxygen-containing lithium compound and this mixture calcinated in a reactor, the calcination takes place at least partly at an absolute pressure of less than 0.5 bar. This method solves the problem of insufficient removal of gases produced during calcination and provides a process requiring shorter reaction times and lower temperatures.
L'invention concerne un procédé de production de métallates constitués de métaux de transition et de lithium de la formule générale (I): Lix(M<1>yM<2>1-y)nOnz, où M<1> représente lithium, cobalt ou manganèse, M<2> représente cobalt, fer, manganèse ou aluminium mais est différent de M<1>, n vaut 2 si M<1> = Mn sinon n vaut 1, x représente un nombre compris entre 0,9 et 1,2, y représente un nombre compris entre 0,5 et 1,0 et z représente un nombre compris entre 1,9 et 2,1. Ce procédé consiste à préparer un mélange intime solide de composés de métaux de transition contenant de l'oxygène et de composés de lithium contenant de l'oxygène puis à calciner ce mélange dans un réacteur dans lequel la calcination est effectuée au moins en partie avec une pression absolue inférieure à 0,5 bar.
Benz Mathias
Krynitz Ulrich
Kummer Wolfgang
Meese-Marktscheffel Juliane
Pross Evelyn
Fetherstonhaugh & Co.
H.c. Starck Gmbh & Co. Kg
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