CALCULATION OF OVERPOTENTIAL OF CO-FIRED SOFC FROM THE AC IMPEDANCE MEASUREMENTS

摘要

In co-fired SOFC having 2 electrode configuration, impedances of each electrode were measured under the DC current bias, up to 3A (0～120mA/cm~2). The overpotentials of co-fired SOFC were calculated from AC impedances. The I-V characteristics of single-cell(S257) estimated from the calculated overpotentials were well matched with measured characteristics below 350mA/cm~2.