Degradation mechanisms on LSCF cathodes
Do you want to help develop innovative and environmentally friendly energy technologies for the future?
The Fuel Cells and Solid State Chemistry Division at Risø DTU is among the world’s research leaders in solid oxide fuel cells (SOFCs) – a technology for clean and efficient conversion of chemical energy (in the form of, e.g., natural gas, hydrogen, biogas, ammonia or methanol) into electricity and heat. In addition we have activities within a number of related topics in functional ceramics, including high-temperature electrolysis, oxygen and hydrogen separation membranes, electrochemical flue gas purification and magnetic refrigeration.
Strontium and iron co-doped lanthanum cobaltite (LSCF, La1-xSrxCo1-yFeyO3-δ) is a mixed oxygen ion and electron conductor. LSCF shows good conductivity and electro-catalytic activity at T < 700 oC and is recognized as a promising cathode material for low temperature SOFCs which are currently being developed by many consortia around the world. However, the LSCF cathode degrades over extended periods of time. The origin of the degradation is unclear at the moment.
The project aims to identify the chemical and the structural degradation mechanisms of the LSCF cathode under realistic environmental conditions. The focus will be the phase stability of LSCF itself and its chemical compatibility with other SOFC components. Self-consistent thermodynamic databases of the relevant systems will be built up utilizing the CALPHAD method. Theoretical thermodynamic calculations and model electrochemical experiments will then be conducted to clarify the major degradation mechanism of the LSCF cathode. This project will be done in close collaboration with Topsoe Fuel Cell A/S.
- Master’s degree in engineering, chemistry, physics, materials science or similar
- Preferably experience with one or more of the following techniques:
- Ability to work independently, to plan and carry out complicated tasks, and to be a part of a large, dynamical group
- Good communication skills in English, both written and spoken