|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||High-Temperature Systems for Energy Conversion and Storage
||In-Operando XRD Tests of LSCF and LSM/YSZ SOFC Cathodes
||John Hardy, Christopher A Coyle, Jared Templeton, Nathan Canfield, Jeffry Stevenson
|On-Site Speaker (Planned)
X-ray diffraction of LSCF and LSM/YSZ cathodes on anode-supported SOFCs was performed during cell tests conducted for ~1000 h. Cells were operated at temperatures between 650 and 850°C at OCV and under constant current conditions at ~0.8 V while exposed to cathode air containing 0-3% H2O and 0-12% CO2. The resulting XRD patterns from the cathodes were inspected visually and analyzed using Rietveld refinement to evaluate time-dependent changes. Gradual changes were detected in the unit cell volumes of major and minor phases during operation. Summation of the XRD patterns accumulated over the entire 1000+ hours of testing resulted in cumulative count times that made it possible to identify phases present in the cathode in concentrations as low as one tenth of a percent.
||Planned: A print-only volume