CCS and Power Systems
Advanced Energy Systems - Solid Oxide Fuel Cells
Understanding of Oxygen Reduction & Reaction Behavior & Developing High Performance and Stable Heterostructured Cathode with Heterostructured Surface
Performer: West Virginia University
Project No: FE0009675
West Virginia University (WVU) will study the fundamental mechanisms of oxygen reduction and reaction (ORR) behavior in heterostructured cathodes through both experimental investigation and theoretical modeling. The focus is on the heterostructured surface of the cathode by infiltration, and its effect on oxygen exchange behavior between the surface and bulk of the lanthanum strontium cobaltite ferrite (LSCF) cathode. The infiltrated phase will be used in a novel combination to tailor the surfaces of LSCF-based cathode backbones. Electrical conductivity relaxation (ECR) will serve as the main experimental method to characterize oxygen transport behavior in the cathode, especially at the infiltrated/utilized to verify the results. Chemical composition and lattice strain variation at the heterointerface formed by infiltration will be detected. A physical model will then be built up and the corresponding simulation results will provide insight into improving cathode performance.
High-performance and stable solid oxide fuel cell (SOFC) cathodes with hetero-structured surfaces will be developed and process parameters such as infiltration solution composition, sintering temperature, and loading amount will be optimized to achieve the best cathode performance. Performance will be evaluated by electrochemical testing of both half and full cells. Long-term on-cell testing will also be done to check the optimized infiltrated cathode stability. Furthermore, steady-state electrochemical performance degradation of the infiltrated cathode will be quantitatively characterized by techniques such as ECR.