Electrode structure

C - Chemistry – Metallurgy – 25 – B

Patent

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Details

C25B 9/06 (2006.01) C25B 9/00 (2006.01) C25B 9/08 (2006.01) C25B 9/20 (2006.01) C25B 11/02 (2006.01) H01M 4/86 (2006.01) H01M 8/02 (2006.01)

Patent

CA 2373098

An electrode structure for use, for example, in a bipolar electrolyser comprising (i) a pan with a dished recess and a flange around the periphery thereof for supporting gasket means for sealing a separator between the flanges in adjacent electrode structures, which separator is disposed between the surface of the anode of a first electrode structure and the cathode of a second electrode structure such that the anode surface is substantially parallel to and faces but is insulated and spaced apart from the cathode surface by the separator and is hermetically-sealed to the separator, (ii) an electrically conductive plate spaced from the pan, (iii) a plurality of electrically- conductive members to which the electrically conductive plate is electroconductively attached and which provide electrically-conductive pathways between the pan and the electrically conductive plate, (iv) inlet for electrolyte and (v) outlets for liquids and gases wherein where the electrode structure is an anode structure the dished recess is provided with a plurality of inwardly projecting projections and where the electrode structure is a cathode structure the dished recess is provided with a plurality of outwardly projecting projections such that the inwardly projecting projections in the dished recess of the pan of the anode structure mate with the outwardly projecting projections m the dished recess of the pan of an adjacent cathode structure in a bipolar electrolyser comprising a plurality of the electrode structures.

L'invention concerne une structure d'électrode utilisée, par exemple, dans un électrolyseur bipolaire comprenant (i) un plat muni d'une cuvette concave et d'un rebord destiné à recevoir un joint servant à étanchéifier un séparateur se trouvant entre les rebords, dans des structures d'électrode adjacentes, ledit séparateur étant logé entre la surface de l'anode d'une première structure d'électrode et la surface de la cathode d'une seconde structure d'électrode, la surface de l'anode étant ainsi en grande partie parallèle et opposée à la surface de la cathode, mais isolée et espacée de cette surface par le séparateur, et hermétiquement isolée dudit séparateur, (ii) une plaque électroconductrice espacée dudit plat, (iii) une pluralité d'éléments électroconducteurs auxquels la plaque électroconductrice est fixée, et qui forment des chemins électroconducteurs entre le plat et la plaque électroconductrice, (iv) une entrée pour électrolyte et (v) des sorties pour liquides et gaz. Si la structure d'électrode est une structure d'anode, la cuvette concave est pourvue de plusieurs enfoncements, et si la structure d'électrode est une structure de cathode, la cuvette concave est pourvue de saillies, de manière que les enfoncements de la cuvette concave du plat de la structure d'anode épousent les saillies de la cuvette concave du plat d'une structure de cathode adjacente, dans un électrolyseur bipolaire comprenant plusieurs structures d'électrode.

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