%0 Journal Article
%A Froning, Dieter
%A Maier, Wiebke
%A Groß, J.
%A Arlt, Tobias
%A Manke, Ingo
%A Lehnert, Werner
%T Evaluation of structural changes of HT-PEFC electrodes from in-situ Synchrotron X-ray radiographs
%J International journal of hydrogen energy
%V 39
%N 17
%@ 1879-3487
%C New York, NY [u.a.]
%I Elsevier
%M FZJ-2014-00044
%P 9447-9456
%D 2014
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000336880500058
%R 10.1016/j.ijhydene.2014.04.059
%U https://juser.fz-juelich.de/record/141675