Numerical Simulation of LSCF-GDC Composite Cathodes with Various Microstructures

In the present study, electrochemical performances of different LSCF-GDC microstructures are numerically simulated in order to investigate the effects of GDC particle sizes and GDC pillars on LSCF cathode performance. Lattice Boltzmann method (LBM) is applied for solving the governing equations. It is found from the numerical results of pure GDC and LSCF-GDC composite cathodes with various particle sizes that the performance improvement by GDC addition is more pronounced for cathodes with smaller particle sizes. In addition, it is shown that LSCF cathode with GDC pillars can enhance the performance of the cathode especially when the reactive region of the cathode becomes thin by using small size powders.