ALTERNATIVE INSTALLATION OF A GAS DIFFUSION ELECTRODE IN AN ELECTROCHEMICAL CELL WITH PERCULATOR TECHNOLOGY

摘要

The invention relates to an electrochemical cell containing an anode half-shell (12) and a cathode half-shell (11), which are separated from each other by a membrane (5) and have corresponding electrodes, and these anode (12) and cathodic (11) half-shells have each wall (13) and each have, in the contact zone of both half-shells, flange zones (14a, 14b, 15a, 15b), which are made frame, and a gas diffusion electrode (3), which consists of a permeable carrier fluid, which is coated with a catalyst material while the gas diffusion electrode (3) has on its lower edge (17) a zone not covered with a catalyst, which acts at the lower end (16) of the electrochemical cell in the contact zone of both half-shells between the flange zones (15b) of the outer wall of the cathodic half-shell and the flange zones (14b) of the outer wall of the anodic half-shells, and between the gas diffusion electrode (3) and the membrane (5) there is a porous medium (8) in parallel, as well as devices for the supply and removal of gas (20, 21) and electrolyte (9, 10), while the gas space (22) separated from the electrolyte space (7) by these means (23). In particular, this invention is characterized in that in the electrolyte space (7) in the cathode semi-envelope (11) there are provided profile inserts (1) in which the upper edge (19) of the gas diffusion electrode (3) protrudes, on which the seal (2) is located, which fixes the gas diffusion electrode (3) in the profile inserts (1), while the gas diffusion electrode (3) has a bending radius α 90 ° relative to the vertical of the clamped gas diffusion electrode.