Preparation and characterization of new mixed conducting oxides based on BaCe{sub 1-x}Gd{sub x}O{sub 3-x/2}
- Univ. of Pennsylvania, Philadelphia, PA (United States)
The high protonic conductivities of barium cerium gadolinium oxides (Ba(Ce{sub 1-x}Gd{sub x})O{sub 3-x/2}, 0 < x < 0.2) has led to their incorporation as electrolytes in fuel cells operating at 873-1073{degrees}K. In an effort to develop new mixed-conducting electrodes that are compatible with the cerate electrolyte, we have examined the electrochemical properties of Pr- and Th-doped barium gadolinium cerate. For both systems the doping increases the electronic contribution to the total conductivity and for Ba(Ce{sub 0.5}Pr{sub 0.4}Gd{sub 0.1})O{sub 3-{delta}} a conductivity exceeding {approx} 0.1 S/cm at 1173{degrees}K in dry air has been obtained. The high conductivities induced by the substitution of Pr may result in their application as cathodes in a cerate-based protonic fuel cell.
- OSTI ID:
- 472031
- Report Number(s):
- CONF-950401--
- Country of Publication:
- United States
- Language:
- English
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