In the present study, the numerical model is developed to optimize the solid oxide fuel cell (SOFC) electrode-electrolyte interface structure. The computational domain consists of La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_3 (LSCF) cathode and Gd_(0.1)Ce_(0.9)O_(1.95) (GDC) electrolyte regions. In the electrode region, electrode materials and pore phases are assumed to be homogeneously distributed. Adjoint method is applied for optimization, and the interface structure is transformed until the total amount of reaction current in the whole computational domain is maximized. It is found from the computational results that the cathode with optimized electrode-electrolyte interface structure has better electrochemical performance than the microstructure with flat electrode-electrolyte interface. In addition, the optimal structures are specified for different electrolyte conductivities and electrode microstructural parameters.
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