Evaluation of GdBaCo2O5 + δ as Cathode Material for Doped Lanthanum Gallate Electrolyte IT-SOFCs

✍ Scribed by J. Peña-Martínez; A. Tarancón; D. Marrero-López; J. C. Ruiz-Morales; and P. Núñez

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 353 KB
• Volume: 8
• Category: Article
• ISSN: 1615-6846
• DOI: 10.1002/fuce.200800026

✦ Synopsis

Abstract

The layered perovskite GdBaCo~2~O~5 + δ~ (GBCO), recently proposed for intermediate temperature solid oxide fuel cell applications, was investigated and compared with Ba~0.5~Sr~0.5~Co~0.8~Fe~0.2~O~3 – δ~ (BSCF) cathode material using La~0.9~A~0.1~Ga~0.8~Mg~0.2~O~2.85~ (A=Sr,Ba) as electrolytes. Area‐specific resistance was measured by impendance spectroscopy in symmetrical cells. The cobaltites were prepared by a modified citrate sol–gel route and tested as cathode materials for doped lanthanum gallate‐based cells using dry H~2~ as fuel and air as oxidant, rendering power density values of 180 and 240 mW cm^–2^ at 1,073 K (1 mm thick pellets) for GBCO and BSCF fuel cells, respectively.