Membrane-electrode unit for a fuel cell

Details Membrane-electrode unit for a fuel cell Membrane-electrode unit for a fuel cell

H - Electricity

01

M

H01M 8/10 (2006.01) H01M 8/02 (2006.01)

Patent

CA 2327520

The invention relates to a membrane electrode unit for a fuel cell, comprising an optionally catalyst-coated anode, an optionally catalyst-coated cathode and a proton conductor located between said anode and said cathode. The proton conductor consists of a microfibre-fleece material which has been impregnated with an electrolyte to the point of saturation. The fleece material is chemically inert in relation to the electrolyte at temperatures of up to +200 ~C and in oxidising and reducing conditions and weighs 20 to 200 g/m2. The thickness of the fleece is less than 1 mm and the pore volume is 65 to 92 %.

L'invention concerne une unité membrane-électrodes pour pile à combustible, qui comprend une anode éventuellement recouverte d'un catalyseur, une cathode éventuellement recouverte d'un catalyseur et un conducteur de protons situé entre l'anode et la cathode. Le conducteur de protons est formé par un non-tissé à base de microfibres qui est imprégné d'un électrolyte jusqu'à saturation. A des températures allant jusqu'à +200 ·C, ainsi que dans des conditions d'oxydation et de réduction, le non-tissé est chimiquement inerte par rapport à l'électrolyte. Le non-tissé pèse entre 20 et 200 g/m?2¿ et son épaisseur est inférieure à 1 mm et le volume poreux se situe entre 65 et 72 %.

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