Mtu Motoren-und Turbinen-union Friedrichshafen Gmbh

Zentrum Fur Sonnenenergie Und Wasserstoff-forschung Baden Wuetternberg Gemeinnuetzige Stiftung

Bernd Rohland

Uwe Jantsch

Manfred Bischoff

Hartmut Wendt

Raimund Stroebel

Vojtech Plzak

Armin Prohaska

Klaus Eberle

Hermann Koch

Frank U Weilberg

The invention relates to a double layer cathode for molten carbonate fuel cells, containing a first layer ( ) consisting of a first cathode material, preferably lithium-treated nickel oxide, and a second layer ( ) consisting of cerium-activated lithium cobaltite. The inventive double layer cathode is characterised in that the polarization resistance is less dependent on temperature and in that it has a longer life. The double layer cathode is especially suitable for operating a fuel cell at less than 650&deg; C. The material for the second cathode layer ( ) is produced by activating cobalt oxide by co-precipitation with cerium and treating it with lithium carbonate to form a suspension. Said suspension is then applied to the first cathode layer ( ) as a second cathode ( ), dried and sintered at a high temperature.

Double layer cathode for molten carbonate fuel cells and method for producing the same

The invention relates to a device for combined purification and compression of hydrogen containing CO. Said device comprises a polymer electrolyte membrane (PEM) cell with a proton-conducting polymer membrane ( ), an anode on one side of the membrane and a cathode ( ) on the other side thereof. Said anode is in the form of a two-layer anode ( ) which comprises a CO-oxidation-selective catalytic layer ( ) on the side facing away from the membrane and an electrochemically active layer ( ) for oxidation of the hydrogen to form protons on the side facing the membrane. The PEM cell also has a flat, porous gas distribution layer provided on the anode side and attached to a current collector. Consequently, the PEM cell resists differential pressures of at least approximately 10 bar. The invention also relates to a process for combined purification and compression of hydrogen containing CO using said device. The CO in the hydrogen containing CO is oxidized selectively to form CO in the PEM cell, and the hydrogen subsequently extensively free of CO is compressed by the PEM cell by electrochemical means at differential pressures of at least approximately 10 bar. The resultant hydrogen is suitable as fuel in PEM fuel cells for vehicles.

Device and method for combined purification and compression of hydrogen containing CO and the use thereof in fuel cell assemblies

The invention concerns a process for the production of a porous lithium cobaltite electrode plate with a large inner surface and low polarization resistance. Lithium carbonate powder and cobalt metal powder are uniformly mixed together and then films are produced from the mixture and plates from the films, which plates are sintered and then placed in an air stream for several hours at a temperature between 400&deg; C. and 488&deg; C. until the conversion of said plates to lithium cobaltite electrode plates with an extremely large inner surface has taken place.

Process for the production of an electrode for a fused carbonate fuel cell

Process for producing molten-carbonate fuel cells

Growing community of inventors

Ulm, Germany

Bernd Rohland