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 National Lab. (PNNL), 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; TRN: AHC29601%%73
- Resource Relation:
- Conference: 188. meeting of the Electrochemical Society, Chicago, IL (United States), 8-13 Oct 1995; Other Information: PBD: Oct 1995
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
40 CHEMISTRY
30 DIRECT ENERGY CONVERSION
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
SOLID ELECTROLYTE FUEL CELLS
CATHODES
SEPARATION EQUIPMENT
MATERIALS
LANTHANUM OXIDES
ELECTROCHEMISTRY
ELECTRIC CONDUCTIVITY
STRONTIUM OXIDES
CALCIUM OXIDES
BARIUM OXIDES
COBALT OXIDES
IRON OXIDES
CHEMICAL COMPOSITION
TEMPERATURE DEPENDENCE
X-RAY DIFFRACTION
SCANNING ELECTRON MICROSCOPY
USES