Abstract
| Original language | English |
|---|---|
| Journal | Journal of The Electrochemical Society |
| Volume | 164 |
| Issue number | 13 |
| Pages (from-to) | F1419-F1426 |
| ISSN | 0013-4651 |
| DOIs | |
| Publication status | Published - 2017 |
Bibliographical note
This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited.Cite this
}
Electrochemical Characterization of a PEMEC Using Impedance Spectroscopy. / Elsøe, Katrine; Grahl-Madsen, L.; Hjelm, Johan; Scherer, G.G.; Hjelm, Johan; Mogensen, Mogens Bjerg.
In: Journal of The Electrochemical Society, Vol. 164, No. 13, 2017, p. F1419-F1426 .Research output: Contribution to journal › Journal article › Research › peer-review
TY - JOUR
T1 - Electrochemical Characterization of a PEMEC Using Impedance Spectroscopy
AU - Elsøe, Katrine
AU - Grahl-Madsen, L.
AU - Hjelm, Johan
AU - Scherer, G.G.
AU - Hjelm, Johan
AU - Mogensen, Mogens Bjerg
N1 - This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited.
PY - 2017
Y1 - 2017
N2 - In this study, electrochemical impedance spectroscopy (EIS) is applied in combination with cyclic voltammetry (CV) and current density – cell voltage curves (iV-curves) to investigate the processes contributing to the total impedance of a polymer electrolyte membrane electrolysis cell (PEMEC). iV-curves were linear above 0.35 A cm−2 implying ohmic processes to be performance limiting, however the impedance spectra showed three arcs indicating three electrochemical reactions at these conditions not to be purely ohmic, but also to have capacitive properties. A hypothesis that the composite IrOx/Nafion anode catalyst layer causes two of these arcs with a constant sum of resistance and current constrictions cause the third arc, is suggested. This hypothesis implies that the total differential cell resistance at current densities above 0.35 A cm−2 is purely ascribed to protonic resistance in Nafion in this type of PEMEC.
AB - In this study, electrochemical impedance spectroscopy (EIS) is applied in combination with cyclic voltammetry (CV) and current density – cell voltage curves (iV-curves) to investigate the processes contributing to the total impedance of a polymer electrolyte membrane electrolysis cell (PEMEC). iV-curves were linear above 0.35 A cm−2 implying ohmic processes to be performance limiting, however the impedance spectra showed three arcs indicating three electrochemical reactions at these conditions not to be purely ohmic, but also to have capacitive properties. A hypothesis that the composite IrOx/Nafion anode catalyst layer causes two of these arcs with a constant sum of resistance and current constrictions cause the third arc, is suggested. This hypothesis implies that the total differential cell resistance at current densities above 0.35 A cm−2 is purely ascribed to protonic resistance in Nafion in this type of PEMEC.
U2 - 10.1149/2.0651713jes
DO - 10.1149/2.0651713jes
M3 - Journal article
VL - 164
SP - F1419-F1426
JO - Journal of The Electrochemical Society
JF - Journal of The Electrochemical Society
SN - 0013-4651
IS - 13
ER -