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Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Forschungszentrum Juelich Gmbh

Linde Aktiengesellschaft

Forschungszentrum Julich Gmbh

Marco Brandner

Wolfgang Kraussler

Andreas Venskutonis

Michael O'Sullivan

Stefan Gerzoskovitz

Thomas Franco

Thomas Leiter

Alexander Leuprecht

Oliver Hirsch

Gerhard Dipl-Ing Leichtfried

Mihails Kusnezoff

Hans Peter Buchkremer

Lorenz Sigl

Karlheinz Scheiber

Nikolai Trofimenko

Johannes Schmid

Nicole Schodel

Gebhard Zobl

Viktar Sauchuk

Georg Kunschert

Reinhold Zach

Axel Behrens

Karin Lucke

Klaus Klapper

Christian Bienert

Alexander Michaelis

Norbert H Menzler

Matthias Ruettinger

Markus Haydn

Robert Muecke

Wolfgang Haring

Matthias Ruttinger

Markus Kogl

Stephan Hummel

Nicole SCHÖDEL

Markus KÖGL

Matthias RÜTTINGER

Wolfgang Schafbauer

Robert MÜCKE

Wolfgang HÄRING

A membrane assembly for the permeative separation of a fluid from fluid mixtures includes a porous, fluid-permeable, metallic support substrate, a membrane that is disposed on the support substrate and is selectively permeable to the fluid to be separated off, and a connecting part which is formed, at least on the surface, of a fluid-tight, metallic material. The support substrate is cohesively bonded along a peripheral section thereof to the connecting part. A ceramic, fluid-permeable, porous, first intermediate layer is disposed between the support substrate and the membrane. At least one ceramic bonding layer is disposed directly on the connecting part and the material bond and extends at least over the cohesive material bond and an adjoining section of the connecting part. The first intermediate layer ends on the bonding layer and has a greater average pore size than the bonding layer.

Membrane assembly with a bonding layer

A powder metallurgical molding forms an interconnector or an end plate for an electrochemical cell. The molding has a chromium content of at least 80% by weight, a basic shape of a plate and one or more flow fields with structuring formed on one or both of the main faces of the molding. A ratio of a maximum diameter Dof the molding, measured along the main face, to a minimum thickness dof a core region of the molding which extends along the flow field or fields and is not affected by the structuring lies in a range of 140&#x2264;D/d&#x2264;350.

Powder metallurgical molding and method of producing same

A powder metallurgical component has a chromium content of at least 80% by weight and pores and/or oxide inclusions which are present in the component. The number per unit area of a sum of pores and oxide inclusions at a cut surface through the component in at least one region is at least 10,000 per mm.

Powdered metal component

A fuel cell () has a plate () produced by powder metallurgy which comprises in one piece a porous substrate area () to which the electrochemically active cell layers () are applied, and a gastight edge area () which is provided with gas passages ().

Fuel cell and method for production thereof

A powder metallurgical molded part includes a disk or plate-like main body and a row of knob-shaped and/or ridge-shaped elevations in a row direction having a height perpendicular to a main plane of the main body and a cross section with side flanks leading from an outer end contour in height direction of the elevation via rounded corner portions into curved portions with a curve radius. The curve radius merges into the surface contour of the main body and a rectilinear flank portion or tangent of the side flank lying at the point where the rounded corner portion merges into the curved portion is disposed at an angle of inclination to the main plane. At least two different angles of inclination are on the same side of the main body and the at least two different angles of inclination represent at least first and second geometries.

Molded part

The invention relates to a layer structure which is formed between an interconnect and a cathode of a solid oxide fuel cell and can be used for forming a ceramic layer structure between an interconnect and a cathode. In this respect, the interconnect comprises a metal alloy containing chromium. The object of the present invention is to provide a layer structure between an interconnect and a cathode of a solid oxide fuel cell with which a good protective function (from corrosion and from chromium vaporization), a high electrical conductivity and also a good thermal expansion behavior adapted to the materials of an interconnect and of a cathode can be achieved. The layer structure in the green state is formed by a powdery spinel as well as at least one of the below-named metal oxides CuO, NiO, CoOand MnOas a sintering additive and at least one powdery perovskite. In this respect, chromium is not contained in any of these chemical compounds and the portion of spinel contained with the metal oxides as a sintering additive is reduced starting from the side facing the interconnect up to the side facing the cathode and the portion of perovskite is reduced starting from the side facing the cathode in the direction of the side facing the interconnect.

Layer structure and use thereof to form a ceramic layer structure between an interconnect and a cathode of a high-temperature fuel cell

The substrate-supported anode for a high-temperature fuel cell comprises an at least three-layer anode laminate on a metallic substrate. Each of the layers of the anode laminate comprises yttria-stabilized zirconia and nickel, wherein the mean particle size of the nickel decreases from one layer to the next as the distance from the substrate increases. The last layer of the anode laminate, which is provided for contact with the electrolyte, has a root mean square roughness of less than 4 &#x3bc;m. The overall mean pore size of this layer is typically between 0.3 and 1.5 &#x3bc;m. Starting powders having a bimodal particle size distribution of yttria-stabilized zirconia and nickel-containing powder are used at least for the first and second layers of the anode laminate. The mean particle size of the nickel-containing powder is reduced from one layer to the next, whereby it is advantageously no more than 0.5 &#x3bc;m in the last layer of the anode laminate.

Anode for a high-temperature fuel cell and production thereof

An interconnector, or bipolar plate, for a high-temperature solid electrolyte fuel cell is composed of a sintered chromium alloy which has sintering pores and contains &#x3e;90% by weight of Cr, from 3 to 8% by weight of Fe and optionally from 0.001 to 2% by weight of at least one element of the group of rare earth metals. The chromium alloy contains from 0.1 to 2% by weight of Al and the sintering pores are at least partially filled with an oxidic compound containing Al and Cr. The interconnector has a high impermeability to gas and dimensional stability.

Interconnector for a high-temperature solid electrolyte fuel cell, method of producing a fuel cell, and high-temperature solid electrolyte fuel cell

A shaped part that is particularly suited as an interconnector or an end plate for a fuel cell stack, is produced by pressing and sintering a pulverulent starting material. The shaped part has a basic body with a multiplicity of knob-like and/or ridge-like elevations with a height h. Each elevation has two inclined side flanks which lead, proceeding from an end contour of the elevation, via rounded corner portions, directly or via intermediate rectilinear portions, into curved portions with a radius R or R', which in turn merge into the surface contour, of the basic body. A ratio of the radius R:h or R&#x2032;:h ranges from 0.25, or preferably from 0.5 to 1.

Method of producing a shaped part

The invention relates to a diaphragm pipe for permeative separation of hydrogen from gas mixtures containing hydrogen, a method for the production thereof as well as a reactor comprising a diaphragm pipe, wherein the diaphragm pipe comprises a porous pipe (S) made of a sintered metal and a diaphragm (M) containing palladium or made of palladium enclosing the outer surface of the sintered metal pipe (S). The sintered metal pipe (S) has at least on one end a fitting (F) made of gasproof material, which is firmly connected with the sintered metal pipe (S).

Membrane tube and reactor having a membrane tube

A shaped part that is particularly suited as an interconnector or an end plate for a fuel cell stack, is produced by pressing and sintering a pulverulent starting material. The shaped part has a basic body with a multiplicity of knob-like and/or ridge-like elevations with a height h. Each elevation has two inclined side flanks which lead, proceeding from an end contour of the elevation, via rounded corner portions, with a radius r or r' directly or via intermediate rectilinear portions, into curved portions, with a radius R or R&#x2032;, which in turn merge into the surface contour, of the basic body. The rectilinear portions, or, in the case of a direct transition of the rounded corner portions into the curved portions, the tangents at the point of the transition, have an angle of inclination relative to the surface contour, between 95&#xb0; and 135&#xb0;.

Shaped part

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Oy-Mittelberg, Germany

Marco Brandner