✦ LIBER ✦

Studies on Composite Cathode with Nanostructured Ce0.9Sm0.1O1.95 for Intermediate Temperature Solid Oxide Fuel Cells

✍ Scribed by G. Xiao; Z. Jiang; H. Li; C. Xia; L. Chen

Publisher: John Wiley and Sons
Year: 2009
Tongue: English
Weight: 714 KB
Volume: 9
Category: Article
ISSN: 1615-6846
DOI: 10.1002/fuce.200900011

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✦ Synopsis

A kind of nanostructured Ce 0.9 Sm 0.1 O 1.95 is prepared by a hydrothermal method. It exhibits large Brunauer-Emmett-Teller area (>120 m 2 g -1 ), open mesoporous structure and nanocrystalline sheets. This material shows high activity for oxygen reduction. An area specific resistance below 0.6 X cm 2 at 600 °C is achieved when it is mixed with Ag paste as a composite cathode in a symmetric cell. This is attributed to its large triple phase boundary area and good ionic conducting property. The influences of microstructure, doping, loading effects of silver nanoparticles and the tem-perature dependence on oxygen reduction kinetics are investigated by the impedance spectroscopy. Although some further optimisations are still required, this special Ce 0.9 Sm 0.1 O 1.95 material reported here exhibits promising features of applications in the composite electrodes for intermediate temperature solid oxide fuel cells (IT-SOFCs).

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