Hydro-quebec

Monique Masse

Karim Zaghib

Abdelbast Guerfi

Fernand Brochu

Michel Gauthier

Michel Armand

Kimio Kinoshita

Synthesis process for new particles of LiTiO, LiZTiOor LiZTiO, preferably having a spinel structure, wherein &#x3b2; is greater than 0 and less than or equal to 0.5 (preferably having a spinel structure), &#x3b1; representing a number greater than zero and less than or equal to 0.33, Z representing a source of at least one metal, preferably chosen from the group made up of Mg, Nb, Al, Zr, Ni, Co. These particles coated with a layer of carbon notably exhibit electrochemical properties that are particularly interesting as components of anodes and/or cathodes in electrochemical generators.

LiTiO, LiZTiOor LiZTiO, particles, processes for obtaining same and use as electrochemical generators

[object Object]

Synthesis process for new particles of LiTiO, LiZTiOor LiZTiO, wherein &#x3b2; is &#x3e;0 and &#x2266;0.5, &#x3b1; is a number &#x3e;0 and &#x2266;0.33, Z is a source of at least one metal, preferably chosen from the group made up of Mg, Nb, Al, Zr, Ni, Co. These particles coated with a layer of carbon notably exhibit electrochemical properties that are particularly interesting as components of anodes and/or cathodes in electrochemical generators. The process may involve the steps of a) preparing a dispersion of a mixture of TiO&#x2014;LiY-carbon, wherein x is a number between 1 and 2, z is 1 or 2, and Y is a radical chosen among CO, OH, O and TiOor a mixture thereof; and 2) heating of the dispersion, preferably to a temperature of between about 400&#xb0; C. and about 1000&#xb0; C.

A process for synthesizing particles of an oxide corresponding to a formula selected from: LiTiO; LiZTiO; and LiZTiO, said process including the steps of: a) preparing an intimately dispersed ternary mixture of TiO&#x2014;LiY-carbon, wherein x is a number between 1 and 2, z is 1 or 2, Y is a radical chosen from the group consisting of CO, OH, O and TiOor a mixture thereof, and the carbon is a carbon powder selected from the group consisting of natural or artificial graphite, carbon black, Shawinigan black, Ketjen black and cokes; b) heating the dispersion at a temperature of between 400 and 1,000&#xb0; C.; and c) if appropriate, adding a source of at least one metal Z to the ternary mixture, wherein the operating conditions are chosen in such a way as to yield a conversion of the initial products respectively into LiTiO, LiZTiO, LiZTiO.

Li4Ti5O12, Li(4-&#x3b1;)Z&#x3b1;Ti5O12 or Li4Z&#x3b2;Ti(5-&#x3b2;O12 particles, processes for obtaining same and use as electrochemical generators

A composition for applying a coating on a support at low temperature from a dispersion of at least a component of the coating to be deposited in the composition. The composition includes at least a strong and heavy solvent with a boiling point higher than 150&#xb0; C. approximately, and a weak solvent with a boiling point less than 100&#xb0; C. approximately. The solvents forming the composition must constitute a mixture that evaporates at a temperature less than 100&#xb0; C. The composition is particularly useful for forming electrodes or electrolyte in lithium-ion batteries. The method and the device used for forming the coating use a dispersion spreader and an infrared lamp.

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Longueuil, Canada

Monique Masse