Electrochemical cell and its use in the separation or electrochemical extraction of oxygen

US5573655A · kind A · utility

Assignees

• L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude · FR
• UNIVERSITE DES SCIENCES ET TECHNOLOGIES DE LILLE 1 · FR
• Ecole Nationale Superieure de Chimie

Inventors

• Gaetan Mairesse · Lambersart, FR
• Jean-Claude Boivin · Les Ulis, FR
• Gilles Lagrange · Les Ulis, FR
• Panayotis Cocolios · Rambouillet, FR

Key dates

• Filing date: Jul 28, 1994
• Grant date: Nov 12, 1996
• Expiry date: Jul 28, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P70/50
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present invention relates to an electrochemical cell comprising a solid electrolyte which conducts O.sup.2- anions in contact with an anode and a cathode of identical or different composition, the solid electrolyte being comprised of a composition derived from Bi.sub.4 V.sub.2 O.sub.11 of which at least one of the constituent cationic elements is substituted by at least one substituting element such that the gamma phase structural type of Bi.sub.4 V.sub.2 O.sub.11 is maintained as well as the equilibrium of charges, at least one of the anode or of the cathode is a material containing at least one element of substitution of said composition derived from Bi.sub.4 V.sub.2 O.sub.11, that element being in a metallic or cationic state. The invention equally relates to the use of the electrochemical cell with a view towards the separation or extraction of oxygen.