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The Georgia Institute of Technology (Georgia Tech) will use specially-designed electrodes and cells, such as electrodes of thin films and patterned electrodes, to study the electrochemical response of lanthanum strontium cobalt ferrite (LSCF) cathodes under realistic operating conditions (ROC), to probe and map contaminants on the LSCF, and to characterize the correlation between electrochemical performance and microstructure/morphology of LSCF cathodes as well as their evolution over time. A range of characterization tools will be used to study the chemical and structural changes during fuel cell operation. Electrochemical techniques, such as impedance and DC polarization, will be intensively applied to characterize the cathode performance, which will be correlated with the structural and compositional evolution of the LSCF cathode under ROC. Proper characterization, modeling techniques, and prediction tools will be used to help in formulating an effective strategy to mitigate the stability issues and predict new catalyst materials that can enhance the stability of LSCF. Finally, the performance and stability of the modified LSCF cathode will be validated in commercially available cells under ROC.

(a) A cross-sectional and (b) a surface view of the LSCF thin film deposited on a gadolinia-doped ceria substrate by a radio frequency sputtering technique after annealing at 800°C for 1 hour.
Principal Investigator
Meilin Liu
Project Benefits

This project focuses on characterizing the degradation mechanism of lanthanum strontium cobalt ferrite (LSCF) cathodes under realistic operating conditions (ROC), aiming to establish the scientific basis for the design of new materials and electrode structures to mitigate stability issues. Improved cell/stack life and performance will reduce operating cost and increase efficiency, resulting in reduction in the cost of electricity and reduction of CO2 emissions from the entire platform. Specifically, this project will characterize and correlate the microstructure, morphology, and chemistry behavior of LSCF cathodes with their electrochemical behavior under ROC and suggest new cathode materials through modeling and simulation.

Project ID
Georgia Tech Research Corporation