Membrane for a gas diffusion electrode, process of manufacturing the membrane, and gas diffusion electrode provided with the membrane
AssigneeMetallgesellschaft Aktiengesellschaft
InventorsEilhard Hillrichs, Ulrich Sander
Life of this patent
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Abstract
The membrane serves to cover a gas diffusion electrode on its outside surface facing a liquid electrolyte. The membrane is impermeable to gas and water-absorbent. It comprises a textile carrier layer. At least one gas-sealing layer, which contains ion exchange material and binder in a weight ratio from 10:1 to 1:2, is bonded to the textile carrier layer. In the manufacture of the membrane, an adhesive layer consisting of a binder in a solvent and subsequently at least one gas-sealing layer are applied to the textile carrier layer.
Claims9
A gas diffusion electrode for use in an electrolyzer containing a liquid electrolyte, said electrode comprising an electrode body of an electrically conductive material and a water-absorptive membrane facing said liquid electrolyte and in contact therewith, said body being provided with passages for a gas, said passages being connected to a supply line for feeding said gas into said passages, said electrode body comprising a gas-permeable catalyst-layer, said membrane comprising a textile carrier layer and at least one gas-impermeable gas-sealing layer, said carrier layer being bonded to said gas-sealing layer, said gas-sealing layer being bonded to said catalyst layer, said gas-sealing layer containing an ion exchange material and a binder in a weight ratio of 10:1 to 1:2.
Dependencies are inferred from the claim text.