Solid oxide fuel cell comprising reaction preventing layer and method for manufacturing same

Abstract

The present invention relates to a solid oxide fuel cell which can improve the overall performance of the cell and obtain durability and reliability, and the invention provides a solid oxide fuel cell comprising a reaction preventing layer and a method for manufacturing the same, wherein an anode, an electrolyte, and a cathode are comprised, and a material which is formed between the electrolyte and the anode comprises 35-90 mol % of gadolinia-doped ceria (GDC) and 10-65 mol % metal oxide.

1 . A solid oxide fuel cell including a reaction preventing layer, comprising:
 an anode;   an electrolyte;   a cathode; and   a reaction preventing layer disposed between the electrolyte and the cathode and formed of a material including 35 mol % to 90 mol % of gadolinia doped ceria (GDC) and 10 mol % to 65 mol % of a metal oxide.   
     
     
         2 . The solid oxide fuel cell of  claim 1 , wherein the metal oxide is selected from the group consisting of alumina (Al 2 O 3 ), ceria (CeO 2 ), gadolinia (Gd 2 O 3 ), yttria (Y 2 O 3 ), and zirconia (ZrO 2 ). 
     
     
         3 . The solid oxide fuel cell of  claim 1 , wherein the cathode includes strontium (Sr), and
 the electrolyte includes a zirconium (Zr) oxide.   
     
     
         4 . The solid oxide fuel cell of  claim 1 , wherein the reaction preventing layer has pores with the size of 0.1 μm or below. 
     
     
         5 . The solid oxide fuel cell of  claim 1 , wherein the reaction preventing layer is formed by an aerosol deposition method (ADM). 
     
     
         6 . The solid oxide fuel cell of  claim 1 , wherein the reaction preventing layer has a thickness of 0.1 μm to 2 μm. 
     
     
         7 . A method of manufacturing a solid oxide fuel cell including a reaction preventing layer, the method comprising:
 forming an anode layer;   forming a solid oxide electrolyte layer on the anode layer;   forming a reaction preventing layer on the electrolyte layer by depositing a material including 35 mol % to 90 mol % of gadolinia doped ceria (GDC) and 10 mol % to 65 mol % of a metal oxide through an aerosol deposition method (ADM) ; and   forming a cathode layer on the reaction preventing layer,   
     
     
         8 . The method of  claim 7 , wherein the metal oxide is selected from the group consisting of alumina (Al 2 O 3 ), ceria (CeO 2 ), gadolinia (Gd 2 O 3 ) yttria (Y 2 O 3 ), and zirconia (ZrO 2 ). 
     
     
         9 . The method of  claim 7 , further comprising heating the cathode layer at 950° C. to 1100° C. 
     
     
         10 . The method of  claim 7 , wherein the forming of the reaction preventing layer through the ADM may be performed by allowing carrier gas to cause a mixed powder including 1 wt % to 20 wt % of the metal oxide in addition to the GDC to impact a surface of the electrolyte layer at a speed of 100 m/sec to 500 m/sec. 
     
     
         11 . The method of  claim 7 , wherein the reaction preventing layer is formed to have a thickness of 0.1 μm to 2 μm.