High performance lithium titanium spinel l14t15012 for...

C - Chemistry – Metallurgy – 01 – G

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C01G 23/00 (2006.01) H01M 4/131 (2010.01) H01M 4/1391 (2010.01) H01M 4/485 (2010.01) C01D 15/00 (2006.01) C30B 7/10 (2006.01) C30B 29/32 (2006.01)

Patent

CA 2455851

The invention concerns a process for producing a spinel compound of formula Li4Ti5O12, comprising a step of preparing a mixture of an organo-lithium compound selected from lithium alcoholates with an organo-titanium compound selected from titanic acid esters, in a liquid medium, and a step of hydrolyzing the mixture of said compounds. The invention also concerns a Li4Ti5O12 particulate material which may be produced according to the previous cited process and which has a BET surface area of at least 10 m2/g. The material is particularly useful in the manufacture of Lithium Ion batteries.

La présente invention concerne un procédé de production d'un composé de spinelle représenté par la formule: Li¿4?Ti¿5?O¿12?, qui comprend une étape consistant à préparer un mélange d'un composé d'organo-lithium sélectionné parmi des alcoolats de lithium avec un composé d'organo-titane sélectionné parmi les esters d'acide titanique, dans un milieu liquide, et une étape consistant à hydrolyser le mélange desdits composés. Cette invention concerne également un matériau particulaire Li¿4?Ti¿5?O¿12? qui peut être produit suivant le procédé précédemment présenté et qui présente une surface active BET au moins égale à 10 m?2¿/g. Ce matériau est tout particulièrement utile dans la fabrication des accumulateurs aux ions de lithium.

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