Lee, B. -K. Yu, Y. -H. So, B. -S. Kim, S. -M. Kim, J. Lee, H. -W. Lee, J. -H. Hwang, J. -H. 2024-01-21T02:01:53Z 2024-01-21T02:01:53Z 2021-09-01 2006-12 1385-3449 https://pubs.kist.re.kr/handle/201004/134888 The concept of micro-contact in electrodes was incorporated into AC two-probe impedance spectroscopy in order to clarify the electrode-related responses in solid oxide fuel cells (SOFCs). The pointed contact of one electrode was combined with the planar electrode as a counterpart in characterizing an YSZ (yttria-stabilized zirconia)/Pt interface of SOFCs. The micro-contact in electrodes induced the decrease in capacitance and the increase in impedance and amplified the bulk responses in YSZ due to the constricted electroding area. The bulk-related portions can be separated from the interfacial polarization of Pt, even though the electrolyte/electrode interface was found to be very sensitive to the measurement condition, i.e., the oscillating voltage. The resolved bulk and interfacial resistances were analyzed using a concept of "spreading resistance.'' Furthermore, the electrode-related issues were ramified for the application of impedance spectroscopy to the solid oxide fuel cells. English SPRINGER EXPERIMENTAL LIMITATIONS 3-POINT MEASUREMENTS ELECTRODE ARTIFACTS Electrical characterization of the platinum/YSZ interfaces in SOFCs via micro-contact impedance spectroscopy Article 10.1007/s10832-006-6583-y 1 JOURNAL OF ELECTROCERAMICS, v.17, no.2-4, pp.735 - 739 JOURNAL OF ELECTROCERAMICS 17 2-4 735 739 scie scopus 000243610600112 2-s2.0-33847195075 Materials Science, Ceramics Materials Science Article; Proceedings Paper EXPERIMENTAL LIMITATIONS 3-POINT MEASUREMENTS ELECTRODE ARTIFACTS SOFC impedance spectroscopy micro-contact electrodes spreading resistance