Abstract
This Study used (Ba0.5Sr0.5)0.9Sm0.1Co0.8Fe0.2O3-δ (BSSCF) as major cathode material, combined with Gadolinia doped Ceria and copper ion for SOFC. For different cathode material, we provide 20% O2 and 6% NO from cathode side to conduct single cell SOFC test and try to show that NO can be used at cathode side of SOFC. Experiment shows that SOFC single cell with only BSSCF cathode under different temperature, applying 20% O2 from cathode side could provide maximum power density 4.79 mW/cm2 (800℃)、6.09 mW/cm2 (850℃)、8.65 mW/cm2 (900℃)、11.33 mW/cm2 (950℃). Combined BSSCF with different wt% of Gadolinia Doped Ceria (GDC) can found that the more wt% GDC added, the better SOFC single performance provided. BSSCF with 50wt%GDC as cathode could provide maximum power density 8.65 mW/cm2, while BSSCF with 70wt%GDC could reach 16.28 mW/cm2, under 800℃ with 20% O2 applied from cathode side. When applying 6% NO from cathode side, BSSCF with GDC could only provide limited performance. If we added Copper into BSSCF perovskite structure to form BSSCCF 712 or BSSCCF 811, cell performance could raise remarkably. Maximum power density can reach 0.8 mW/cm2 (BSSCCF 712), and 1.66 mW/cm2(BSSCCF811), showing that copper ion is really helpful for NO redution.