Electrochemical properties of mixed conducting La{sub 1{minus}x}M{sub x}Co{sub 1{minus}y}Fe{sub y}O{sub 3{minus}{delta}} (M = Sr,Ca,Ba) perovskites
- Pacific Northwest Lab., Richland, WA (United States). Materials Sciences Dept.
At elevated temperatures, some ABO{sub 3} perovskite type oxides having Co and Fe as B site cations exhibit substantial mixed (anionic and electronic) conductivity. Because of this behavior, they are candidate materials for applications such as solid oxide fuel cell cathodes and oxygen separation membranes. The purpose of the present study is to increase the understanding of the effects of composition, temperature, and environment on the electrochemical properties of selected materials within the La{sub 1{minus}x}M{sub x}Co{sub 1{minus}y}Fe{sub y}O{sub 3{minus}{delta}} (M=Sr,Ca,Ba) system in order to evaluate their applicability for the above-mentioned applications. Characterization techniques include XRD, SEM, TGA, dc conductivity, dilatometry, oxygen permeation measurements, and iodometric titration.
- Research Organization:
- Pacific Northwest Lab., Richland, WA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 161518
- Report Number(s):
- PNL-SA--26300; CONF-951007--9; ON: DE96002482
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
36 MATERIALS SCIENCE
40 CHEMISTRY
BARIUM OXIDES
CALCIUM OXIDES
CATHODES
CHEMICAL COMPOSITION
COBALT OXIDES
ELECTRIC CONDUCTIVITY
ELECTROCHEMISTRY
IRON OXIDES
LANTHANUM OXIDES
MATERIALS
SCANNING ELECTRON MICROSCOPY
SEPARATION EQUIPMENT
SOLID ELECTROLYTE FUEL CELLS
STRONTIUM OXIDES
TEMPERATURE DEPENDENCE
USES
X-RAY DIFFRACTION