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

Qimonda Ag

Plansee Se

International Business Machines Corporation

Alexander Michaelis

Ramachandra Divakaruni

Till Schloesser

Helmut Horst Tews

Ulrike Gruening

Stephan Wege

Mihails Kusnezoff

Marco Brandner

Nikolai Trofimenko

Johannes Schmid

Andreas Venskutonis

Viktar Sauchuk

Wolfgang Bergner

Karin Lucke

Andreas Klipp

Tobias Mayer-Uhma

Cornelia Klein

Falko Schlenkrich

Stephen Kudelka

Burkhardt Fassauer

Eberhard Friedrich

Stephan Kudelka

Björn Schwarz

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

A method of preparing a coating solution, comprising the steps of providing a first solution comprising a lower alcohol; a polyethylene glycol; a complexing agent; and water; providing a second solution comprising a higher alcohol; and at least one metal alkoxide, wherein the metal in said at least one metal alkoxide is selected from the group consisting of zirconium, aluminium, titanium, tantalum and yttrium; forming a sol-gel solution by mixing said first and second solutions and thereby hydrolyzing said at least one metal alkoxide to a metal oxide and an alcohol; forming a concentrated solution by removing said lower alcohol and the alcohol resulting from the hydrolysis of said at least one metal alkoxide; and forming a coating solution by adding a medium alcohol to said concentrated solution.

Method of preparing a coating solution and a corresponding use of the coating solution for coating a substrate

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Dresden, Germany

Alexander Michaelis