Anode-supported SOFC Operated Under Single-chamber Conditions at Intermediate Temperatures

✍ Scribed by M. Morales; J. J. Roa; X. G. Capdevila; M. Segarra; S. Piñol

• Book ID: 102217062
• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 425 KB
• Volume: 11
• Category: Article
• ISSN: 1615-6846
• DOI: 10.1002/fuce.201000063

✦ Synopsis

Anode-supported SOFC was fabricated using gadolinia doped ceria (GDC) as the electrolyte (15 lm of thickness), Ni-GDC as the anode and La 0.5 Sr 0.5 CoO 3 -d -GDC as the cathode. Catalytic activities of the electrodes and electrical properties of the cell were determined, using mixtures of methane + air, under single-chamber conditions. This work assessed with special and wide emphasis the effect of temperature, gas composition and total flow rate on the cell performance. As a result, operational temperature range of the fuel cell was approximately between 700 and 800 °C, which agrees with the results corresponding to the catalytic activities of electrodes. While Ni-GDC anode was enough active towards methane partial oxidation at cell temperatures higher than 700 °C, the LSC-GDC cathode was enough inactive towards partial and total oxidation of methane at cell temperatures lower than 800 °C. Under optimised gas compositions (CH 4 /O 2 ratio (1) and total flow rate ((530 mL min -1 ), power densities of 145 and 235 mW cm -2 were obtained at 705 and 764 °C, respectively.