(WO9409521-A1)      High temp fuel cell is made of a porous fuel gas consuming anode, a porous oxygen consuming cathode, an electrically insulating porous ceramic material between them with a molten carbonate electrolyte. The novelty is that the cathode is made of porous nickel oxide matrix with a thin electrochemically active coating which is insoluble in the carbonate melt. The coating is esp a double oxide.    The coating is a double oxide chosen from Perovskite type ABO3, spinel type AB2O4, Ni-contg double oxides of type NiAO2 and/or NiA2O4 and semi-conductor oxides or mixtures of these. The semi-conductor oxide is chosen from LiFeO2, LiCoO2; Li2MnO3, Li2SnO3, Li2ZrO3, LiCuO2, and Li3VO4. In the nickel contg oxides, A is Co or Fe. In the spinels, A is Co, Fe or Mn and B is Co, Fe or Cu. In the Perovskite material, A is Ni or La. The coating is 5-150 nm thick and is produced by dip coating the cathode, PVD or CVD or electrocoating.    USE/ADVANTAGE -   As cell for converting chemical energy of combustible gases into electrical energy. The cathode has a longer service life due to its corrosion protection coating from the electrolyte and long term operational stability. It can be produced at low cost.    (DE4235514-C2)      High temp fuel cell is made of a porous fuel gas consuming anode, a porous oxygen consuming cathode, an electrically insulating porous ceramic material between them with a molten carbonate electrolyte. The novelty is that the cathode is made of porous nickel oxide matrix with a thin electrochemically active coating which is insoluble in the carbonate melt. The coating is esp a double oxide.    The coating is a double oxide chosen from Perovskite type ABO3, spinel type AB2O3, Ni-contg double oxides of type NiAO2 and/or NiA2O4 and semi-conductor oxides or mixtures of these. The semi-conductor oxide is chosen from LiFeO2, LiCoO2; Li2MnO3, Li2SnO3, Li2ZrO3, LiCuO2, and Li3VO3. In the nickel contg oxides, A is Co or Fe. In the spinels, A is Co, Fe or Mn and B is Co, Fe or Cu. In the Perovskite material, A is Ni or La. The coating is 5-150 nm thick and is produced by dip coating the cathode, PVD or CVD or electrocoating.    USE/ADVANTAGE -   As cell for converting chemical energy of combustible gases into electrical energy. The cathode has a longer service life due to its corrosion protection coating from the electrolyte and long term operational stability. It can be produced at low cost.