Manufacturing method to improve oxygen ion conductivity

H - Electricity – 01 – B

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H01B 13/00 (2006.01) B05D 3/02 (2006.01) H01B 1/00 (2006.01) H01M 8/12 (2006.01)

Patent

CA 2511942

A method of manufacturing an ionic conductor to improve oxygen Ion conductivity that is otherwise reduced by the presence of deleterious impurities comprising silicon or silicon containing compounds. In accordance with the Invention a dissolved salt of a dopant consisting of an alkaline- earth metal is applied to an oxygen Ion conducting material composed of doped ceria, doped zirconia, or doped lanthanum gallate and having the impurities. The solution can also be applied with equal success to cation salts and oxides used in making the oxygen Ion conducting material. The oxygen Ion conducting material with the solution applied thereto is thoroughly mixed and then heated to evaporate the solvent and to decompose the alkaline-earth salt and thereby to form said ionic conductor.

Cette invention concerne un procédé de fabrication d'un conducteur ionique visant à améliorer la conductivité des ions oxygène qui est d'ordinaire réduite par la présence d'impuretés nuisibles comprenant le silicium ou des composés contenant du silicium. Selon la présente invention, un sel dissous d'un dopant constitué d'un métal alcalino-terreux est appliqué sur un matériau conducteur d'ions oxygène composé d'oxyde de cérium dopé, de zircone dopée ou de gallate de lanthane dopé et renfermant ces impuretés. La solution peut également être appliquée avec les mêmes résultats sur des sels et des oxydes cationiques utilisés dans la fabrication du matériau conducteur d'ions oxygène. Le matériau conducteur d'ions oxygène sur lequel est appliquée la solution est grossièrement mélangé puis chauffé afin que le solvant s'évapore et que le sel alcalino-terreux se décompose, ce qui permet d'obtenir le conducteur ionique.

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