Unit cell for flat-tubular solid oxide fuel cell or solid oxide electrolyzer, and flat-tubular solid oxide fuel cell and flat-tubular solid oxide electrolyzer using the same

A unit cell for a flat-tubular solid oxide fuel cell or solid oxide electrolyzer, comprising:

• an anode including a plurality of first gas passages therein;
• an electrolyte layer applied on the anode;
• a cathode formed on the electrolyte layer;
• and
• a connector formed on a surface of the electrolyte layer opposite a surface on which the cathode is formed,
• wherein the connector comprises a plurality of connection parts which are spaced apart from each other in a longitudinal direction of the unit cell to form a second gas passage, wherein the connector further comprises a support part, and the support part is integrally formed with the connection parts in a manner that the support part is attached to a lateral surface of the connection parts so as to support the connection parts.