Current-voltage characteristics of fuel cells with ceria-based electrolytes
Book
·
OSTI ID:242563
- Swiss Federal Inst. of Technology, Zuerich (Switzerland)
Dense electrolyte membranes with a thickness of 200 {micro}m have been prepared from ceria solid solutions with Gd{sub 2}O{sub 3}, Sm{sub 2}O{sub 3} and CaO by tape casting. Electrochemical properties of CeO{sub 2}-based fuel cells have been studied in the temperature range from 600 to 800 C. The electrolytes exhibit an ionic conductivity of 3--5 S/m at 700 C and mechanical stability in oxidizing as well as in reducing atmospheres. Power densities exceeding 350 mW/cm{sup 2} at 750 C are possible in CeO{sub 2}-based fuel cells with perovskite cathodes and Ni-cermet anodes. The mixed ionic/electronic conductivity of ceria electrolytes and its influence on current-voltage characteristics under fuel cell operating conditions are discussed.
- OSTI ID:
- 242563
- Report Number(s):
- CONF-950683--; ISBN 1-56677-095-5
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
30 DIRECT ENERGY CONVERSION
CALCIUM OXIDES
CERIUM OXIDES
CURRENT DENSITY
ELECTRIC CONDUCTIVITY
ELECTRIC POTENTIAL
ELECTRICAL PROPERTIES
ENERGY EFFICIENCY
EXPERIMENTAL DATA
GADOLINIUM OXIDES
MASS TRANSFER
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
PERFORMANCE
POWER DENSITY
SAMARIUM OXIDES
SAMPLE PREPARATION
SOLID ELECTROLYTE FUEL CELLS
SOLID ELECTROLYTES
CALCIUM OXIDES
CERIUM OXIDES
CURRENT DENSITY
ELECTRIC CONDUCTIVITY
ELECTRIC POTENTIAL
ELECTRICAL PROPERTIES
ENERGY EFFICIENCY
EXPERIMENTAL DATA
GADOLINIUM OXIDES
MASS TRANSFER
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
PERFORMANCE
POWER DENSITY
SAMARIUM OXIDES
SAMPLE PREPARATION
SOLID ELECTROLYTE FUEL CELLS
SOLID ELECTROLYTES