Scandia-stabilized zirconia-impregnated (La, Sr)MnO3 cathode for tubular solid oxide fuel cells

We have studied the properties of a LSM-ScSZ composite cathode fabricated by a two-step process including dip-coating LSM framework and ion-impregnating ScSZ, for using with anode-supported tubular solid oxide fuel cells. A preliminary examination of the single tubular cell, consisting of a Ni-YSZ anode support tube, a Ni-ScSZ anode functional layer, a ScSZ electrolyte film, and a LSM-ScSZ cathode fabricated by ion-impregnating, has been carried out, and an improved performance was obtained. The polarization resistance of the cathode side clearly decreased for impregnating the electronic conducting phase (LSM) with the ionic conducting phase (ScSZ). And the single cell with the impregnated cathode generated a maximum power density of 433 mW cm(-2) at 850 A degrees C, when operating with humidified hydrogen.