Solid oxide fuel cell cathode diffusion polarization: materials and exergy study

•The peak exergy efficiency of the SOFC is achieved at the range of 0.35–0.38.•The peak exergy efficiency of the SOFC is achieved at the cathode pore mean radius in the range of 1.5 × 10−4 to 2 × 10−4 cm.•Having the cathode material tortuosity in the range of 2.8–3 increase exergy efficiency of the...

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