Lithiated metal oxides

Details Lithiated metal oxides Lithiated metal oxides

C - Chemistry, Metallurgy

01

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C01G 45/00 (2006.01) C01G 51/00 (2006.01) C01G 53/00 (2006.01) H01M 4/48 (2006.01) H01M 4/50 (2006.01) H01M 4/52 (2006.01) H01M 10/40 (2006.01)

Patent

CA 2283942

A lithiated metal oxide of the general formula: LiayMbxM'b(1-x)Obz, where a is 1 or 2, b is 1 or 2, 0x1, 0y1, 1.8z2.2 and M and M' are multi-valent metals, a method of synthesizing such lithiated metal oxides, and a rechargeable lithium- based battery having at least one electrode in which such a lithiated metal oxide is used as an active material. The process comprises combining at least one lithium carboxylate or lithium alkoxide salt, at least one metal carboxylate salt and an alcohol solvent; reacting the combination in the presence of heat; drying the reaction mixture to remove volatile byproducts and solvent; and heat treating.

L'invention concerne un oxyde de métal au lithium de la formule générale Li¿ay?M¿bx?M'¿b(1-x)?O¿bz?, dans laquelle a représente 1 ou 2, b représente 1 ou 2, 0?x?1, 0?y?1, 1,8?z?2,2 et M ainsi que M' sont des métaux multivalents, un procédé de synthèse de ces oxydes de métal au lithium, et un accumulateur à base de lithium rechargeable comportant au moins une électrode dans laquelle on utilise cet oxyde de métal au lithium comme matière active. Le procédé consiste à combiner au moins un sel de carboxylate de lithium ou un sel d'alcoxyde de lithium, au moins un sel de carboxylate de métal et un solvant à l'alcool, à faire réagir la combinaison en présence de chaleur, à sécher le mélange de réaction pour extraire les sous-produits et le solvant volatil, et à traiter à chaud.

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