Long-term stable high-temperature fuel cells (SOFC) and process for their production

摘要

The invention relates to the field of energy technology and relates to high-temperature fuel cells that can be used, for example, for combined heat and power plants. DOLLAR A The object of the invention is to produce high-temperature fuel cells that are long-term stable by a simple process. DOLLAR A The task is solved by a high-temperature fuel cell in which the cathode has a perovskite composition and in the area of the cathode / electrolyte interface has a perovskite partially decomposed into its oxides and a significantly increased number of micropores with a pore size of 2 mum. DOLLAR A The object is further achieved by a process for the production of high-temperature fuel cells, in which the high-temperature fuel cell is subjected to an overload due to a cathodic overvoltage at the working temperature of the high-temperature fuel cell in height and until no further reduction in the internal resistance of the high-temperature fuel cell is found.