Gas diffusion electrode with catalyst for an electrochemical cell with solid electrolyte and method for making such an electrode
AssigneeVlaamse Instelling Voor Technologisch Onderzoek
InventorsPaul Dirven, Willy Engelen
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Abstract
Gas diffusion electrode with catalyst for an electrochemical cell with solid electrolyte, in particular for a fuel cell with solid electrolyte, which electrode contains a hydrophobic, porous back support (12), a non-catalytic intermediate layer (13) which contains electron conductive material and an active catalytic layer (14) which contains bound catalyst particles, characterized in that the intermediate layer (14) contains a mixture of electron conductive material and a proton conductive ionomer, and in that the active layer (14) forms the outside layer and the catalyst particles are bound by a proton conductive ionomer
Claims18
A gas diffusion electrode with catalyst for an electrochemical fuel cell with solid electrolyte comprising the following:
- (a) a hydrophobic, porous back support (12);
- (b) a non-catalytic intermediate layer (13) comprising a mixture of an electron conductive material and a proton conductive ionomer;
- and
- (c) an active catalytic layer (14) which forms an outside layer of the electrode and which comprises catalyst particles bound by a proton conductive ionomer.
A method for making a gas diffusion electrode with catalyst for an electrochemical fuel cell with solid electrolyte comprising the following steps:
- (a) forming a non-catalytic intermediate layer (13) by sprinkling or atomizing onto a porous hydrophobic back support (12) a liquid ink comprising an electron conductive material and an ionomer in a solvent;
- (b) removing the solvent from the intermediate layer;
- and
- (c) forming an active catalyst layer (14) by sprinkling or atomizing onto the intermediate layer a liquid ink comprising catalyst particles and an ionomer in a solvent.
Dependencies are inferred from the claim text.