Journal article
Phase Equilibria and Defect Chemistry of the La-Sr-Co-O System
Department of Energy Conversion and Storage, Technical University of Denmark1
Vienna University of Technology2
Continuum Modelling and Testing, Department of Energy Conversion and Storage, Technical University of Denmark3
Solid State Electrochemistry, Department of Energy Conversion and Storage, Technical University of Denmark4
Strontium doped lanthanum cobaltite (LSC, La1−xSrxCoO3−δ) is a promising oxygen electrode material for intermediate temperature solid oxide cells (SOCs) and oxygen membranes. Its application in service is however impeded by its thermodynamic instability. The present work is aiming to identify the phase stability of LSC by thermodynamic modeling of the La-Sr-Co-O system using the CALculation of PHAse Diagrams (CALPHAD) method coupled with experiments.
The calculated results based on the developed database are validated using experimental data both from literature and the present work. General agreement is achieved between model predictions and experimental results. Other properties of the LSC perovskite, such as oxygen non-stoichiometry and cation distribution, are also calculated and predicted based on the developed La-Sr-Co-O database.
These calculations can provide important guidance in designing LSC-based materials for various applications and the established thermodynamic functions can serve as input for further thermodynamic calculations on altered and even more complex perovskites.
Language: | English |
---|---|
Year: | 2023 |
Pages: | 4419-4430 |
ISSN: | 1873619x and 09552219 |
Types: | Journal article |
DOI: | 10.1016/j.jeurceramsoc.2023.03.026 |
ORCIDs: | Shang, Yijing , Hendriksen, Peter Vang , Chen, Ming and 0000-0001-7251-5650 |