Solid oxide fuel cell or solid oxide electrolyzing cell and method for operating such a cell

A solid oxide fuel cell or a solid oxide electrolyzing cell, comprising;

• a) a plurality of cathode-anode-electrolyte units, each CAE-unit comprising;
• a first electrode for an oxidizing agent,
• a second electrode for a combustible gas, and
• a solid electrolyte between the first electrode and the second electrode, and
• b) a metal interconnect between the CAE-units, the interconnect including:
• a first gas distribution element comprising a gas distribution structure for the combustible gas, wherein the first gas distribution element is in contact with the second electrode of the CAE-unit, and
• a second gas distribution element comprising channels for the oxidizing agent and comprising separate channels for a tempering fluid, wherein the channels for the oxidizing agent are in contact with the first electrode of an adjacent CAE-unit, and wherein
• the first gas distribution element and the second gas distribution element being electrically connected, wherein the first gas distribution element comprises a planar base layer, a first layer and a second layer, wherein the first and second layers are disposed with the gas distribution structure,
• the second gas distribution element is arranged on the side of the base layer of the first gas distribution element and forming a supporting layer,
• the separate channels for the tempering fluid are in contact with the baser layer of the first gas distribution element,
• the second gas distribution element comprises a plurality of corrugations, the corrugations forming a plurality of channels for the oxidizing agent and a plurality of separate channels for the tempering fluid, the plurality of channels extending parallel to each other,
• the corrugations consists of a corrugated sheet of metal, and
• a manifold is adapted such that the channels for the oxidizing agent and the channels for the tempering fluid are both in fluid communication with the same source of oxygen containing gas.