Abstract: Disclosed is a method of manufacturing a cathode for a solid oxide fuel cell (SOFC) including preparing an electrode composition containing urea, ultrasonically spraying the electrode composition onto a GDC scaffold, and drying the scaffold. By using urea, calcination (?700° C.) after each infiltration cycle can be omitted, the next infiltration cycle is performed immediately after the drying (?100° C.), and thus the cathode manufacturing process time can be greatly reduced. Disclosed is also a solid oxide fuel cell including an anode support, an anode functional layer disposed on the anode support, an electrolyte disposed on the anode functional layer, and a cathode disposed on the electrolyte, wherein the cathode is formed by ultrasonic spraying using an electrode composition containing urea.

Abstract: Disclosed is a method for manufacturing a large-area thin-film solid oxide fuel cell, the method including: preparing an anode support slurry, an anode functional layer slurry, an electrolyte slurry, and a buffer layer slurry for tape casting; preparing an anode support green film, an anode functional layer green film, an electrolyte green film, and a buffer layer green film by tape casting the slurries onto carrier films; staking the green films, followed by hot press and warm iso-static press (WIP), to prepare a laminated body; and co-sintering the laminated body.

Abstract: Disclosed is a method for manufacturing a large-area thin-film solid oxide fuel cell, the method including: preparing an anode support slurry, an anode functional layer slurry, an electrolyte slurry, and a buffer layer slurry for tape casting; preparing an anode support green film, an anode functional layer green film, an electrolyte green film, and a buffer layer green film by tape casting the slurries onto carrier films; staking the green films, followed by hot press and warm iso-static press (WIP), to prepare a laminated body; and co-sintering the laminated body.

Abstract: Disclosed is a method for coating a metallic interconnect for a solid oxide fuel cell (SOFC), the method including the steps of: carrying out pre-treatment for removing impurities adhered on a surface of the metallic interconnect; and carrying out pulse plating with cobalt as an anode, and the metallic interconnect as a cathode, in which an average current density (Ia) is set in a room-temperature cobalt plating solution, and a maximum current density (Ip), a current-on time (Ton) and a current-off time (Toff) are adjusted based on Ia=Ip×Ton/(Ton+Toff). Through the disclosed method, it is possible to obtain a metallic interconnect having a coating surface which has a high electrical conductivity and a high chrome volatilization inhibiting property and can minimize the occurrence of micro-cracks and micro-pores, thereby improving the performance of the SOFC.

Abstract: Disclosed is a method for heating a metallic interconnect for a solid oxide fuel cell (SOFC) to 150˜300° C., which can minimize the thermal shock by reducing a temperature difference between the metallic interconnect and a coating material during a thermal plasma coating process on the metallic interconnect for the SOFC. Accordingly, through the disclosed method, a densified coating layer with minimized micro pores/cracks can be formed on the surface of the metallic interconnect. Thus, it is possible to reduce the loss in output performance during the operation of the SOFC at a high temperature, and to maintain the long-term durability and performance of the metallic interconnect.