TY  - JOUR
AU  - Reimer, Uwe
AU  - Ehlert, Jannik
AU  - Janssen, Holger
AU  - Lehnert, Werner
TI  - Water distribution in high temperature polymer electrolyte fuel cells
JO  - International journal of hydrogen energy
VL  - 41
IS  - 3
SN  - 0360-3199
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2015-05713
SP  - 1837 - 1845
PY  - 2016
AB  - In this work a high temperature polymer electrolyte fuel cell based on a phosphoric acid doped polybenzimidazole membrane is operated at 160 °C on dry air and dry hydrogen. The anodic stoichiometry was varied to resemble typical operation with pure hydrogen or reformate gas. At the outlet of the fuel cell liquid water was collected by condensers. The resulting amounts of liquid water from cathode and anode were computationally analyzed. The results yielded an effective diffusion coefficient of water vapor of D≈2.7⋅10−7D≈2.7⋅10−7 m2 s−1, which is the average value for the cell based on the water partial pressures at the outlets. From the calculated water partial pressures at the anode and cathode it can be concluded that the concentration of phosphoric acid differs significantly within catalyst layer of the anode and cathode. Finally, the crossover of hydrogen and oxygen was shown to depend on the swelling of the membrane.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000369461500048
DO  - DOI:10.1016/j.ijhydene.2015.11.106
UR  - https://juser.fz-juelich.de/record/255572
ER  -