Nonlinear frequency response analysis of dehydration phenomena in polymer electrolyte membrane fuel cells

verfasst von

Thomas Kadyk, Richard Hanke-Rauschenbach, Kai Sundmacher

Abstract

Dehydration phenomena in a PEM fuel cell were investigated by nonlinear frequency response analysis (NFRA) in a differential H₂/H₂ cell. The linear H_1,0 spectra, which are equal to classic EIS spectra, showed not only an increase of the membrane resistance but also an increase of the anode reaction resistance, caused by dehydration leading to the decrease of the protonic conductivity of the polymer network in the catalyst layer. With this, active sites with long protonic pathes to the membrane become inactive. In order to further clarify this effect, modelling work was used. Therefore, proton transport was incorporated into an existing model of a differential H₂/H₂ cell. Finally, the key features of NFRA spectra under dehydration and CO poisoning are compared in order to discuss the suitability of NFRA for unambiguous diagnosis of PEMFC. It can be seen that while the linear spectrum is not sufficient to distinguish between both cases, the second order frequency response functions can be used for discrimination.

Externe Organisation(en)

Max-Planck-Institut für Dynamik komplexer technischer Systeme
Otto-von-Guericke-Universität Magdeburg

Typ

Artikel

Journal

International Journal of Hydrogen Energy

Band

37

Seiten

7689-7701

Anzahl der Seiten

13

ISSN

0360-3199

Publikationsdatum

05.2012

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Erneuerbare Energien, Nachhaltigkeit und Umwelt, Feuerungstechnik, Physik der kondensierten Materie, Energieanlagenbau und Kraftwerkstechnik

Ziele für nachhaltige Entwicklung

SDG 7 – Erschwingliche und saubere Energie

Elektronische Version(en)

https://doi.org/10.1016/j.ijhydene.2012.01.148 (Zugang: Unbekannt)