Solid oxide fuel cell comprising anode alkaline-based promoter loaded

Abstract

A solid oxide fuel cell according to this invention can provide a solid oxide fuel cell with improved performance, by loading an alkali-based promoter in an anode.

1 . A solid oxide fuel cell comprising:
 a cathode, an anode, and an electrolyte between the cathode and anode,   wherein at least a part of the pores of the anode comprises a promoter, and the promoter is an alkali metal compound.   
     
     
         2 . The solid oxide fuel cell according to  claim 1 , wherein
 the alkali metal compound is alkali metal oxide, alkali metal hydroxide, or a combination thereof.   
     
     
         3 . The solid oxide fuel cell according to  claim 1 , wherein
 the alkali metal is lithium (Li), sodium (Na), potassium (K), or cesium (Cs).   
     
     
         4 . The solid oxide fuel cell according to  claim 1 , wherein
 the promoter is M 2 O, MOH, or a combination thereof, and   the M is lithium (Li), sodium (Na), potassium (K), or cesium (Cs).   
     
     
         5 . The solid oxide fuel cell according to  claim 1 , wherein
 the anode is a metal-ceramic composites   
     
     
         6 . The solid oxide fuel cell according to  claim 1 , wherein
 the anode of the solid oxide fuel cell has lower electrode resistance, compared to an anode of a solid oxide fuel cell that does not comprise the promoter.   
     
     
         7 . A method for manufacturing the solid oxide fuel cell according to  claim 1 , comprising steps of:
 introducing an alkali metal precursor in at least a part of the pores of the anode (step 1); and   producing the promoter from the alkali metal precursor (step 2).   
     
     
         8 . The method according to  claim 7 , wherein
 the alkali metal precursor is alkali metal carbonate or alkali metal nitrate.   
     
     
         9 . The method according to  claim 8 , wherein
 the alkali metal precursor is M 2 CO 3 , or MNO 3 , and   the M is lithium (Li), sodium (Na), potassium (K), or cesium (Cs).   
     
     
         10 . The method according to  claim 7 , wherein
 the step 1 comprises coating a solution comprising the alkali metal precursor on the surface of the anode, or immersing the anode in a solution comprising the alkali metal precursor.   
     
     
         11 . The method according to  claim 7 , wherein
 the step 1 comprises introducing a solution comprising the alkali metal precursor in a gas line for introducing fuel in the anode.   
     
     
         12 . The method according to  claim 7 , wherein
 the step 1 comprises bonding a current collector comprising the alkali metal precursor on the surface of the anode.   
     
     
         13 . The method according to  claim 8 , wherein
 the step 2 comprises introducing fuel or moisture in a gas line for introducing fuel in the anode.