A high temperature H{sub 2}S/air fuel cell utilizing ceria-based solid electrolytes

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:33617

Peterson, D; Winnick, J ^[1]

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1. Georgia Inst. of Tech., Atlanta, GA (United States). School of Chemical Engineering

A solid oxide fuel cell with electrolytes based on CeO{sub 2} has been developed utilizing H{sub 2}S as the fuel. Both proton and oxide conduction electrolyte systems have been examined. Experiments with the oxide-conducting ceria doped with samaria using sputtered platinum electrodes have shown open circuit potentials of approximately 0.7 V and short circuit current densities of up to 46 mA/cm{sup 2} at 700 C. Furthermore, a maximum power density of 5.05 mW/cm{sup 2} at 686 C has been obtained. This is the best result ever obtained using H{sub 2}S as the fuel in a solid oxide fuel cell. Recently, both the proton conductor ytterbia-doped SrCeO{sub 3} and the mixed-ionic conductor samaria-doped BaCeO{sub 3} have been examined. Preliminary results have verified the concept behind this cell and indicate a significant potential for these electrolytes. Fuel cell run results will be discussed as well as electrolyte membrane fabrication and analytical techniques used to characterize the powder and membranes.

• OSTI ID: 33617
• Report Number(s): CONF-940529--; ISBN 1-56677-080-7
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
BARIUM OXIDES
CERIUM OXIDES
COAL GASIFICATION PLANTS
COAL LIQUEFACTION PLANTS
DESIGN
HYDROGEN SULFIDES
OXIDATION
PERFORMANCE
PETROLEUM REFINERIES
SAMARIUM OXIDES
SOLID ELECTROLYTE FUEL CELLS
SOLID ELECTROLYTES
STRONTIUM OXIDES
WASTE MANAGEMENT
YTTERBIUM OXIDES