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

Plansee Se

Karin Lucke

Mihails Kusnezoff

Nikolai Trofimenko

Viktar Sauchuk

Marco Brandner

Andreas Venskutonis

Johannes Schmid

Alexander Michaelis

Sindy Mosch

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

Described is a functional layer for high-temperature fuel cells and to a method for the production of functional layers. The functional layer is in particular a low-sintering, electrically conductive, ceramic layer which is formed between an interconnector and a cathode of a fuel cell. The functional layer is formed from a material which has at least two phases. A first phase is a perovskite ceramic material containing bismuth-cobalt and a second phase is a bismuth manganite and/or bismuth cobaltite (Bi&#x2014;Mn&#x2014;Co&#x2014;0).

Functional layer for high-temperature fuel cells and method for production

Growing community of inventors

Dresden, Germany

Karin Lucke