Viable AC two-probe impedance spectroscopy based on spatially-limited contact probe for SOFC cathode

초록

We repor on a unique characterization method for the electrode reactions of SOFCs via impedance spectroscopy combined with a spatially-constricted contact based on a robust electrolyte which is expected to give more reliable measurement set-up. Various electrode materials were chosen to validate our method and the corresponding impedance phenomena were analyzed to give an insight for optimization of the SOFC electrode. The ramifications of limited-contact impedance spectroscopy are discussed for an exhaustive understanding of electrode-related polarizations in SOFCs. ©The Electrochemical Society.