TY  - JOUR
AU  - Sietmann, Michael
AU  - Janßen, Holger
AU  - Müller, Martin
AU  - Lehnert, Werner
TI  - An analysis of the imperfections and defects inside composite bipolar plates using X-Ray computer tomography and resistivity simulations
JO  - International journal of hydrogen energy
VL  - 46
IS  - 50
SN  - 0360-3199
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2021-02292
SP  -  25677-25688
PY  - 2021
AB  - With the increasing mass production, the quality control of bipolar plates (BPPs) becomes more important. A classification and understanding of imperfections and defects is necessary for the design of quality assurance measures within the manufacturing process. In this paper, a combined X-Ray computer tomography (CT) and resistivity simulation approach is used to investigate graphite composite BPPs. With this non-destructive approach, the morphology and composition of a detailed BPP section, as well as an entire flow field, can be analyzed for its characteristics and defects. The different detected imperfections occurring in injection-molded and compression-molded BPP samples include cracks, air bubbles and agglomerations of voids and foreign particles. The investigated flow field geometry has a major impact and increases the electrical resistance by about 19% compared to a bulk material body. The investigated imperfections inside the BPP material have a minimal impact on the electrical resistance of the BPP.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000675512000013
DO  - DOI:10.1016/j.ijhydene.2021.05.078
UR  - https://juser.fz-juelich.de/record/892731
ER  -