(Invited) In Situ Optical and Electrochemical Studies of SOFC Carbon Tolerance

Correlating real time, in situ spectroscopic observations with electrochemical performance provides insight into the ability of solid oxide fuel cells (SOFCs) to function sustainably despite adverse operating conditions. Experiments described in this work monitored the performance of SOFCs construct...

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Bibliographic Details
Main Authors: Reeping, Kyle W., Halat, David M., Kirtley, John D., McIntyre, Melissa D., Walker, Robert A.
Format: Conference Proceeding
Language:English
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Summary:Correlating real time, in situ spectroscopic observations with electrochemical performance provides insight into the ability of solid oxide fuel cells (SOFCs) to function sustainably despite adverse operating conditions. Experiments described in this work monitored the performance of SOFCs constructed with two different electrolyte materials: 8% yttria stabilized zirconia (YSZ) and 10% scandia stabilized zirconia (ScSZ). Both types of SOFCs were operated with CH4 as a fuel and carbon accumulation was monitored by in situ vibrational Raman scattering. SOFC performance was characterized using both linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS). Data showed that despite the more favorable conductivity properties of ScSZ, neither the rate nor the type of carbon formed is affected by electrolyte composition.
ISSN:1938-5862
1938-6737
DOI:10.1149/06101.0057ecst