Electrochemical cell and use thereof in the electrochemical...

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B01D 53/32 (2006.01) C01B 13/02 (2006.01) C25B 1/02 (2006.01) G01N 27/407 (2006.01)

Patent

CA 2123507

Electrochemical cell consisting of an O2- anion conductor solid electrolyte in contact with an anode and cathode of identical or different composition. Said electrolyte consists of a composition derived from Bi4V2O11, one at least of the constitutive cationic elements being substituted by at least one substituent element chosen so that the structural type of the Bi4V2O11 gamma phase is maintained together with the balance of charges. Either the anode or the cathode comprises two parts, a first part being made of a mixed electronic and ionic conducting material in contact with the solid electrolyte, the second part being made of an electronic conducting material and placed over the first part. The invention also concerns the use of the electrochemical cell for oxygen separation or extraction.

2123507 9406545 PCTABS00165 La présente invention concerne une cellule électrochimique constituée d'un électrolyte solide conducteur d'anions O2- en contact avec une anode et une cathode de composition identique ou différente, ledit électrolyte solide étant constitué d'une composition dérivée de Bi4V2O11 dont l'un au moins des éléments cationiques constitutifs est substitué par au moins un élément substituant choisi de sorte que le type structural de la phase gamma de Bi4V2O11 est maintenu ainsi que l'équilibre des charges, l'une au moins de l'anode ou de la cathode comprend deux parties, une première partie étant en un matériau conducteur mixte électronique et ionique en contact avec l'électrolyte solide, la deuxième partie étant en un matériau conducteur électronique et superpose la première partie. L'invention concerne également l'utilisation de la cellule électrochimique en vue de la séparation ou de l'extraction d'oxygène.

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