A solid oxide cell obtainable by a process comprising the steps of: - depositing a fuel electrode layer on a fuel electrode support layer - depositing an electrolyte layer comprising stabilised zirconia on the fuel electrode layer to provide an assembly of fuel electrode support, fuel electrode and electrolyte - optionally sintering the assembly of fuel electrode support, fuel electrode and electrolyte together to provide a pre-sintered half cell - depositing on the electrolyte layer of the pre-sintered half cell one or more oxygen electrode layers, at least one of the one or more oxygen electrode layers comprising a composite of lanthanum-strontium-manganite and stabilised zirconia to provide a complete solid oxide cell - sintering the one or more oxygen electrode layers together with the pre-sintered half cell to provide a sintered complete solid oxide cell - impregnating the one or more oxygen electrode layers of the sintered complete solid oxide cell with manganese to obtain a manganese impregnated solid oxide cell.