| 초록 |
Sr0.92Y0.08Ti1-xNixO3-δ (SYTN) perovskite has been investigated as a solid oxide fuel cell anode and steam methane reforming catalyst material. To analyze the effect of Ni in SYTN, 0, 3, 5 mol% of Ni was substituted for Ti at the B-site. As Ni is substituted, oxygen vacancy defects increase and the oxygen ion conductivity of SYTN increases. The CH4 conversion for the steam methane reforming reaction using the STYN5 anode was 0.80, 0.96, and 0.99 at 700, 800, and 900℃, respectively, and the H2-to-CO ratio was 3.38, 3.32 and 3.24 at 700, 800, and 900℃, respectively, which are close to the theoretical values for the steam methane reforming and water-gas shift reactions. The maximum power densities under H2 fuel conditions were 45.3 and 80.6mW/cm2 for the SYTN0 and SYTN5 anodes, respectively. Under CH4 fuel conditions, the maximum power densities decreased to 37.3 (85.7%) and 64.7 (80.3%) mW/cm2 for the SYTN0 and SYTN5 anodes, respectively. SYTN5's excellent electrochemical properties and high oxygen ion conductivity provide excellent cell performance. |
