2007
DOI: 10.1002/fuce.200700019
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Distortions in Electrochemical Impedance Spectroscopy Measurements Using 3‐Electrode Methods in SOFC. I – Effect of Cell Geometry

Abstract: The use of a reference electrode (RE) is necessary to independently measure the overpotential of each electrode in solid oxide fuel cells (SOFC). This type of set‐up, known as the 3‐electrode (or 3‐terminal) configuration, can give erroneous results if the RE does not effectively separate the potential of the two active electrodes. In this work, calculations and experiments were performed to verify the effectiveness of the 3‐electrode configuration used in electrochemical impedance spectroscopy (EIS) measureme… Show more

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Cited by 68 publications
(82 citation statements)
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“…13), 14) The reference electrode should be located at the area where the potential distribution is uniform and constant. 15), 16) In addition, the reference electrode should be positioned at a distance greater than the triple thickness of the electrolyte from the edge of the working and counter electrode, 14), 17) while its size should not be too large.…”
Section: )mentioning
confidence: 99%
“…13), 14) The reference electrode should be located at the area where the potential distribution is uniform and constant. 15), 16) In addition, the reference electrode should be positioned at a distance greater than the triple thickness of the electrolyte from the edge of the working and counter electrode, 14), 17) while its size should not be too large.…”
Section: )mentioning
confidence: 99%
“…A reference electrode (RE) is required to measure the individual anode and cathode potentials in fuel cells but the applicability of the commonly used three electrode configuration 2 alongside thin solid electrolytes is still being debated. The main concern is that the overpotentials and impedance responses (impedance spectra) of the anode or cathode are a function of RE position and the degree of misalignment of the active electrodes of the membrane electrode assembly (MEA); there have been extensive theoretical studies, involving simulation methods [5][6][7][8][9][10][11][12][13].…”
Section: Introductionmentioning
confidence: 99%
“…The situation is worse when trying to separate the impedance responses (on introduction of a.c. signals) of an anode and a cathode from the whole cell response, as the potential distributions in thin electrolytes are frequency dependent [9,[11][12].…”
Section: Introductionmentioning
confidence: 99%
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