Effect of cell-to-cell distance in segmented-in-series solid oxide fuel cells

Open circuit voltage and maximum output density show higher value in the order of cell distance of 2, 3 and 1 mm. While the shunting current decreases with increasing cell distance, the ohmic resistance, however, increases with increasing cell distance as the interconnector length increases. The impedance analysis shows that the polarization resistance decreases substantially as the cell distance decreases. This study demonstrates that care should be taken for the SIS-SOFC as the cell-to-cell distance influences the output characteristics.