Journal Article

FZJ-2014-00044

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Evaluation of structural changes of HT-PEFC electrodes from in-situ Synchrotron X-ray radiographs

Froning, D. (Corresponding author)FZJ* ; Maier, W.FZJ* ; Groß, J. ; Arlt, T. ; Manke, I. ; Lehnert, W.FZJ*

2014
Elsevier New York, NY [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.ijhydene.2014.04.059

Abstract: One of the main goals for improvement of high-temperature polymer electrolyte fuel cells (HT-PEFCs) is the increase of the fuel cell performance under different operating conditions. We investigated the correlation between operating conditions and structural changes in the electrodes by means of in-situ through-plane synchrotron X-ray radiography. From the radiographs it is possible to clearly distinguish between the electrode crack structure beneath the ribs and beneath the channels of the flow field. We present a statistical method to analyze these crack structures. For this purpose a ‘radar’ method was developed in order to obtain the width of the cracks at many different locations and the distribution of crack widths. We found a different behavior of cracks located beneath the ribs and beneath the channels and an influence of the operating conditions on local regions of the crack structure.

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Contributing Institute(s):

1. Elektrochemische Verfahrenstechnik (IEK-3)

Research Program(s):

1. 123 - Fuel Cells (POF2-123) (POF2-123)

Appears in the scientific report 2014

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Database coverage:
; Current Contents - Social and Behavioral Sciences ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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