KIT | KIT-Bibliothek | Impressum | Datenschutz

On the role of inductive loops at low frequencies in PEM electrolysis

Hensle, Niklas 1; Brinker, Debora ORCID iD icon 1; Metz, Sebastian; Smolinka, Tom; Weber, André ORCID iD icon 1
1 Institut für Angewandte Materialien – Elektrochemische Technologien (IAM-ET1), Karlsruher Institut für Technologie (KIT)

Abstract:

Inductive loops at low frequencies have been observed in the electrochemical impedance spectra (EIS) of various electrochemical cells. Although different physicochemical models for this phenomenon have been suggested in many other applications, this topic has not been widely discussed in the field of proton exchange membrane (PEM) electrolysis.

In this article, low-frequency inductive loops in PEM electrolysis cells and their impact on cell performance are analyzed. We show that this phenomenon is reproducible and occurs with different cell materials and setups. Its impact increases with increasing current density and decreasing temperature. At extreme conditions (7 A∙cm$^{−2}$, 40 °C) we show that the negative polarization resistance of the inductive process can exceed the capacitive polarization processes by a factor of three, resulting in a direct current resistance less than the high frequency series resistance of the cell.


Verlagsausgabe §
DOI: 10.5445/IR/1000162596
Veröffentlicht am 28.09.2023
Originalveröffentlichung
DOI: 10.1016/j.elecom.2023.107585
Scopus
Zitationen: 4
Web of Science
Zitationen: 4
Dimensions
Zitationen: 6
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Elektrochemische Technologien (IAM-ET1)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 10.2023
Sprache Englisch
Identifikator ISSN: 1388-2481, 1873-1902
KITopen-ID: 1000162596
Erschienen in Electrochemistry Communications
Verlag Elsevier
Band 155
Seiten Art.Nr.: 107585
Schlagwörter PEM electrolysis, EIS, Inductive loops, Low frequency, High current density, Negative polarization resistance
Nachgewiesen in Web of Science
Scopus
Dimensions
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page