TY  - JOUR
AU  - Stähler, Markus
AU  - Stähler, Andrea
AU  - Scheepers, Fabian
AU  - Carmo, Marcelo
AU  - Lehnert, Werner
AU  - Stolten, Detlef
TI  - Impacts of Porous Transport Layer Compression on Hydrogen Permeation im PEM Water Electrolysis
JO  - International journal of hydrogen energy
VL  - 45
IS  - 7
SN  - 0360-3199
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2019-05848
SP  - 4008-4014
PY  - 2020
AB  - Gas permeation through a membrane electrode assembly (MEA) is an important issue in the development of polymer electrolyte membrane (PEM) water electrolyzers, because it can cause explosions and efficiency losses. The influence of operating pressure, temperature and MEA modifications on the permeation was already investigated. However, most of the studies pay no attention to the compression of the porous transport layer (PTL) of the MEA when assembling it in a test cell to carry out the experiments.This paper deals with the impact of the PTL compression on hydrogen permeation and cell voltage. Polarization, impedance and permeation measurements are used to demonstrate that the compression significantly affects the MEA's properties. Measurements show either a linear or nonlinear correlation between current density and hydrogen permeation, depending on the compression.The results indicate that the compression of the PTL must be taken into account for developing MEAs and comparing different permeation measurements.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000514018600014
DO  - DOI:10.1016/j.ijhydene.2019.12.016
UR  - https://juser.fz-juelich.de/record/866782
ER  -