Method for manufacturing solid oxide fuel cell and solid oxide fuel cell
View Patent ↗A method is provided for manufacturing a solid oxide fuel cell having excellent power generation performance and thermal cycle resistance and a solid oxide fuel cell. A method for manufacturing a solid oxide fuel cell includes a first step ST 11 of sequentially forming a fuel electrode and a solid oxide electrolyte layer on a substrate; a second step ST 12 of forming an air electrode intermediate layer on the solid oxide electrolyte layer; and a third step ST 13 of forming, on the air electrode intermediate layer, an air electrode conductive layer using a mixture obtained by mixing first particles in a first average particle size range in which the average particle size (d50) is in a range of 27.0 μm to 31.0 μm and second particles in a second average particle size range having an average particle size (d50) smaller than the first average particle size range.
1. A method for manufacturing a solid oxide fuel cell which includes an air electrode having an air electrode intermediate layer and an air electrode conductive layer, comprising: a first step of sequentially forming a fuel electrode and a solid oxide electrolyte layer on a substrate;
a second step of forming the air electrode intermediate layer on the solid oxide electrolyte layer; and
a third step of forming, on the air electrode intermediate layer, the air electrode conductive layer having a composition represented by General Formula (1) described below using a mixture obtained by mixing first particles in a first average particle size range in which the average particle size (d50) is in a range of 25.0 μm to 35.0 μm and second particles in a second average particle size range having an average particle size (d50) smaller than the first average particle size range,
(La 1-x-y Sr x Ca y ) z MnO 3 Formula (1)
(in Formula (1), x, y, and z satisfy 0<x<0.5, 0<y<0.5, 0.1≤x+y≤0.5, and 0.92≤z≤0.99).
2. The method for manufacturing a solid oxide fuel cell according to claim 1 ,
wherein the second average particle size range of the second particles is in a range of 2.5 μm to 3.0 μm.
3. The method for manufacturing a solid oxide fuel cell according to claim 1 ,
wherein the first particles are obtained using a spray dry method.
4. The method for manufacturing a solid oxide fuel cell according to claim 1 ,
wherein the mixing ratio between the first particles and the second particles is in a range of 40:60 to 60:40.
5. A solid oxide fuel cell manufactured using the method for manufacturing a solid oxide fuel cell according to claim 1 .
6. The method for manufacturing a solid oxide fuel cell according to claim 2 ,
wherein the first particles are obtained using a spray dry method.
7. The method for manufacturing a solid oxide fuel cell according to claim 2 ,
wherein the mixing ratio between the first particles and the second particles is in a range of 40:60 to 60:40.
8. The method for manufacturing a solid oxide fuel cell according to claim 3 ,
wherein the mixing ratio between the first particles and the second particles is in a range of 40:60 to 60:40.
9. A solid oxide fuel cell manufactured using the method for manufacturing a solid oxide fuel cell according to claim 2 .
10. A solid oxide fuel cell manufactured using the method for manufacturing a solid oxide fuel cell according to claim 3 .
11. A solid oxide fuel cell manufactured using the method for manufacturing a solid oxide fuel cell according to claim 4 .
12. The method for manufacturing a solid oxide fuel cell according to claim 1 , wherein
the air electrode intermediate layer includes a ceria compound represented by Sm 1-x Ce x O 2 (0.8≤x≤0.9).