Gas diffusion electrode for polymer electrolyte membrane...

Details Gas diffusion electrode for polymer electrolyte membrane... Gas diffusion electrode for polymer electrolyte membrane...

H - Electricity

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H01M 8/02 (2006.01) C25B 9/10 (2006.01) C25B 11/03 (2006.01) H01M 4/86 (2006.01) H01M 4/88 (2006.01) H01M 4/96 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2238738

A particularly inexpensive, homogeneous and porous gas diffusion electrode which comprises at least one electrically conductive, hydrophobic and gas-permeable gas diffusion layer, comprising a mechanically stable support material which is impregnated with at least one electrically conductive material having a bulk conductivity of >= 10 mS/cm is produced. The gas diffusion electrode can be coated with a catalytically active layer. The electrodes of the invention are particularly suitable for use in fuel cells and electrolysis cells.

L'invention concerne la production d'une électrode de diffusion gazeuse, particulièrement économique, homogène et poreuse. Ladite électrode contient une couche de diffusion gazeuse conductrice, hydrophobe et perméable au gaz, laquelle renferme un matériau support mécaniquement stable qui est imprégné d'au moins un matériau conducteur d'une conductivité en profondeur ? 10 mS/cm. L'électrode de diffusion gazeuse peut être recouverte d'une couche catalytiquement active. Les électrodes de l'invention sont notamment adaptées à l'utilisation dans des piles à combustible et des cellules d'électrolyse.

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