Fuel cell stack including a plurality of fuel cells and method of manufacturing the same

1. A fuel cell stack, comprising:

a plurality of fuel cells in which a fuel electrode, a solid oxide electrolyte, and an air electrode are sequentially laminated;

an interconnector that electrically connects the fuel cells which are adjacent to each other; and

an interconnector connecting layer that is interposed directly between the air electrode and the interconnector,

wherein the interconnector connecting layer is formed from a material, which is expressed by a composition formula of (La 1-x-y Sr x Ca y ) z MnO 3 -A ppm SiO 2 -D ppm MgO (provided that, 0<x≤0.4, 0<y≤0.4, 0.1≤x+y≤0.5, 0.95≤z<1, A: 10 to 300, D: 10 to 400), through firing.

2. The fuel cell stack according to claim 1 ,

wherein the interconnector connecting layer is formed from a material, which is expressed by a composition formula of (La 1-x-y Sr x Ca y ) z MnO 3 -A ppm SiO 2 -D ppm MgO (provided that, 0<x≤0.4, 0<y≤0.4, 0.1≤x+y≤0.5, 0.95≤z<1, A: 100 to 300, D: 100 to 400), through firing.

3. The fuel cell stack according to claim 1 ,

wherein a shrinkage ratio when the interconnector connecting layer is fired at 1200° C. for 2 hours is 8% to 25%.

4. The fuel cell stack according to claim 1 ,

wherein a film thickness of the interconnector connecting layer is set to 3 μm to 20 μm.

5. A fuel cell module, comprising:

the fuel cell stack according to any one of claims 1 to 4 .