Electrochemical gaseous diffusion half cell

C - Chemistry – Metallurgy – 25 – B

Patent

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Details

C25B 9/00 (2006.01) C25B 9/08 (2006.01) C25B 11/03 (2006.01) H01M 4/86 (2006.01)

Patent

CA 2271297

An electrochemical half cell based on a gaseous diffusion electrode (5) as a cathode or anode, comprising a gas space for a gaseous diffusion electrode (5) formed by one or several gas pockets (2a, 2b, 2c, 2d), an ion exchanger membrane (40), a retaining element (11), a gas inlet (21) and a gas outlet (22), an electrolyte feed pipe (20), an electrolyte discharge pipe (22) and a housing (13). Said half-cell is characterized in that the gas diffusion electrode (5) is connected to one or more of the gas pockets (2a, 2b, 2c, 2d) thereby forming one or several modules (1a, 1b, 1c, 1d) which are removably secured to the retaining element (11), wherein the gas inlet (21) and the gas outlet (22) are removably connected to the gas pockets (2a, 2b, 2c, 2d).

L'invention concerne une demi-cellule électrochimique à base d'une électrode à diffusion gazeuse (5) en tant que cathode ou anode, comportant un espace gazeux pour l'électrode à diffusion gazeuse, formé d'une ou plusieurs poches de gaz (2a, 2b, 2c, 2d), une membrane échangeuse d'ions (40), une structure de maintien (11), une arrivée de gaz (21) et une évacuation de gaz (22), une conduite d'amenée d'électrolyte (20), une conduite d'évacuation d'électrolyte (22) et un boîtier (13). La demi-cellule est caractérisée en ce que l'électrode à diffusion gazeuse (5) est raccordée à la poche de gaz (2a, 2b, 2c, 2d), pour former un ou plusieurs modules (1a, 1b, 1c, 1d) fixé(s) de façon libérable sur la structure de maintien (11), l'arrivée de gaz (21) et l'évacuation de gaz (22) formant une liaison libérable avec la poche de gaz (2a, 2b, 2c, 2d).

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