화학공학소재연구정보센터
Journal of the Electrochemical Society, Vol.154, No.12, B1270-B1275, 2007
Preparation of SOFC anodes by Electrodeposition
Anodes for solid oxide fuel cells (SOFCs) have been prepared by electrodeposition of either Co or Ni into a layer of porous yttria-stabilized zirconia (YSZ) , 60 mu m thick. The YSZ, having 65% porosity, was prepared by tape casting with graphite pore formers and was attached to the dense YSZ electrolyte. After adding 10 vol % CeO2 by impregnation of aqueous solutions of Ce (NO3)(3), followed by calcination at 723 K, the porous YSZ was made conductive by exposing it to n- butane at 1123 K to form a coating of carbon. As much as 40 vol % metal could be added to the porous layers, while the carbon could then be removed by exposing the anode to humidified H-2 at SOFC operating temperatures. The ohmic losses in cells containing 40 vol % Co or 30 vol % Ni were unaffected by heating to 1173 K. Finally, a cell with 15 vol % Cu and 15 vol % Co was prepared by electrodeposition of Cu onto electrodeposited Co. No carbon formation was observed on the Cu - Co anode following exposure to dry methane at 1073 K. (c) 2007 The Electrochemical Society.