A typical anode material should possess good catalytic activity and electronic conductivity to sufficiently fulfil its primary role to catalyse the fuel oxidation and then to conduct the electrons generated by oxidation of the fuel to the external circuit for useful work. Nickel is a good conductor and further acts as a catalyst for hydrogen oxidation but because it high TEC it is not mechanically compatible with electrolytes such as YSZ 102 . Therefore, nickel on its own as anode is avoided but is used in the form of a composite.