Abstract
A phase field method is used to simulate the microstructural evolution of nickel-yttria stabilized zirconia composite anode of solid oxide fuel cell based on three-dimensional microstructures reconstructed by focused ion beam-scanning-electron-microscopy technique. By implementing efficient semi-implicit Fourier spectral method in the phase field simulation with different periodic boundary conditions, the computation efficiency is improved in orders of magnitude. In order to quantitatively study the correlation between the anode microstructure evolution and the resulting electrochemical performance degradation, the evolution of three-phase boundary and nickel specific surface area are calculated. Degradation experiments have been conducted to evaluate the simulation results. By choosing an appropriate value for mobility in the simulation, predicted and experimental results showed good agreement.
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