Structure of solid oxide fuel cell

Abstract

Disclosed is a structure of a solid oxide fuel cell, including a porous tubular anode support having a plurality of through holes, and an electrolyte layer and a cathode layer sequentially formed on the inner surface of the tubular anode support, so that fuel flows via the plurality of through holes and air flows through the inside of the cathode layer, thus increasing a diffusion rate of fuel and air to thereby increase the reaction rate, resulting in excellent cell performance. This structure eliminates the flow of fuel and air around the outside of the fuel cell, thus preventing the formation of an oxidizing atmosphere at the inside and outside of the tubular cell, thereby increasing lifespan of the cell and ensuring cell reliability.

1 . A tubular solid oxide fuel cell, comprising:
 a porous tubular cathode support having a plurality of through holes formed to enable fuel to flow in a longitudinal direction thereof;   an electrolyte layer disposed on an inner surface of the tubular cathode support; and   an anode layer disposed on an inner surface of the electrolyte layer.   
     
     
         2 . The tubular solid oxide fuel cell as set forth in  claim 1 , wherein an air impermeable cathode layer is formed on an outer surface of the tubular cathode support. 
     
     
         3 . The tubular solid oxide fuel cell as set forth in  claim 1 , wherein the tubular solid oxide fuel cell has a cross-section of any one shape selected from the group consisting of a circular shape, a polygonal shape and a rounded rectangular shape. 
     
     
         4 . The tubular solid oxide fuel cell as set forth in  claim 1 , wherein the tubular solid oxide fuel cell having a cross-section of the rounded rectangular shape has one or more bridges formed at the anode layer. 
     
     
         5 . The tubular solid oxide fuel cell as set forth in  claim 1 , wherein the plurality of through holes of the cathode support extends in an axial longitudinal direction of the tubular solid oxide fuel cell and has a honeycomb shape in cross-section.