Effects of the Addition of SDC on the Performance of a LSCN Anode

✍ Scribed by S. Li; S. Wang; Y. Wang; H. Nie; T.-L. Wen

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 226 KB
• Volume: 6
• Category: Article
• ISSN: 1615-6846
• DOI: 10.1002/fuce.200600024

✦ Synopsis

Abstract

50 wt.‐% of Ce~0.8~Sm~0.2~O~2~ (SDC) is added to La~0.85~Sr~0.15~Cr~0.9~ Ni~0.1~O~3~ (LSCN) to investigate its use as an alternative anode for solid oxide fuel cells, especially for hydrocarbon fuels. When LSCN is mixed and sintered together with SDC or YSZ at 1,500 °C for 12 h, no obvious second phase is observed from the XRD patterns. Although the conductivity of LSCN‐SDC is lower than LSCN, the polarization overpotential is reduced by a factor of 10. The mixed electronic‐ionic conductivity of SDC enlarges the reaction zone and improves the catalytic activity of the anode. The interface bonding between LSCN and the YSZ electrolyte is also modified by the nanometer SDC. An improved output performance on a self supported SOFC (LSCN‐SDC/YSZ/PSM‐YSZ) is obtained with H~2~ fuel compared with CH~4~ fuel.