Journal Article

FZJ-2020-01097

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Nafion film transport properties in a low-Pt PEM fuel cell: impedance spectroscopy study

Reshetenko, T. ; Kulikovsky, A. (Corresponding author)FZJ*

2019
RSC Publishing London

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Please use a persistent id in citations: http://hdl.handle.net/2128/24357  doi:10.1039/C9RA07794D

Abstract: Unexpected over-linear transport loss in low-Pt PEM fuel cells has been a subject of numerous studies and discussions in literature. Most of the authors agree that these losses are due to oxygen transport in the Nafion film covering Pt/C agglomerates in the cathode catalyst layer (CCL). We develop a model for PEM fuel cell impedance, which takes into account oxygen transport through the film. The model is fitted to experimental impedance spectra of a low-Pt PEM fuel cell. Fitting gives the film thickness in the range of 10 to 13 nm, and the film transport resistivity decreasing from 1.2 s cm−1 to 0.2 s cm−1 as the cell current density increases from 50 to 800 mA cm−2. Fitting returns low value of the through-plane oxygen diffusivity in the CCL, indicating that the low-Pt electrode is partially flooded.

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Contributing Institute(s):

1. Elektrochemische Verfahrenstechnik (IEK-14)

Research Program(s):

1. 135 - Fuel Cells (POF3-135) (POF3-135)

Appears in the scientific report 2020

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Database coverage:
; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; National-Konsortium ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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