Preparation and Properties of Ni-Doped Ce_0.85Sm_0.15O_1.925 Ceramics for Use as Electrolytes in IT-SOFCs

Abstract:

The electrolytes materials Ce_0.85Sm_0.15O_1.925-x at.% NiO (x=0, 0.5, 1, 2, 3) were synthesized by means of glycine-nitrate process (GNP). Their structures and ionic conductivities were characterized by X-ray diffraction, SEM and AC impedance spectroscopy. All the electrolytes were found to be ceria based solid solutions of fluorite type structures. Grain size increased with NiO. The grain boundary resistance could be decreased by small addition of NiO. Electrolyte-supported solid oxide fuel cells (SOFC) fabricated with Ni-doped Ce_0.85Sm_0.15O_1.925 electrolytes were studied and compared with other fuel cell with Ce_0.85Sm0.15O_1.925 (SDC) as electrolytes.

• Periodical: Advanced Materials Research (Volumes 608-609)
• Pages: 941-944
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.608-609.941
• Online since: December 2012
• Authors: Dan Xu, Shi Feng Xu
• Keywords: Electrochemical Performance, Electrolyte, SDC-Nio, Solid Oxide Fuel Cell (SOFC)

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