TY  - JOUR
AU  - Froning, Dieter
AU  - Maier, Wiebke
AU  - Groß, J.
AU  - Arlt, Tobias
AU  - Manke, Ingo
AU  - Lehnert, Werner
TI  - Evaluation of structural changes of HT-PEFC electrodes from in-situ Synchrotron X-ray radiographs
JO  - International journal of hydrogen energy
VL  - 39
IS  - 17
SN  - 1879-3487
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2014-00044
SP  - 9447-9456
PY  - 2014
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000336880500058
DO  - DOI:10.1016/j.ijhydene.2014.04.059
UR  - https://juser.fz-juelich.de/record/141675
ER  -