TY  - JOUR
AU  - Treutlein, Leander
AU  - Javed, Ali
AU  - Wolf, Niklas
AU  - Kungl, Hans
AU  - Karl, André
AU  - Jodat, Eva
AU  - Eichel, Rüdiger-A.
TI  - Gas Crossover in Membrane Electrolyzers—The Impact of MEA Conditioning on Gas Permeability
JO  - Journal of the Electrochemical Society
VL  - 172
IS  - 6
SN  - 0013-4651
CY  - Bristol
PB  - IOP Publishing
M1  - FZJ-2025-02781
SP  - 064507 -
PY  - 2025
N1  - German Federal Ministry of Education and Research (BMBF) within the H2Giga project DERIEL (grant number 03HY122C)
AB  - Hydrogen crossover in proton exchange membrane electrolytic cells (PEMEC) can lead to reduced usable hydrogen output, shortened lifespan, and interruptions in operation due to safety concerns. Extensive studies have explored the crossover mechanism under various operating conditions using different setups. In this study, we demonstrate a setup that is capable of quantifying hydrogen and oxygen permeability of dry and wet membranes, as well as catalyst coated membranes; i.e. membrane electrode assemblies (MEAs). We monitored the hydrogen and oxygen permeabilities of Nafion™ N115, N117 and NR212 membranes, respectively, and studied the effect of catalyst coating on hydrogen permeability of the membrane. The impact of conditioning on N115-based MEAs in a fully hydrated state was investigated. To realize this, MEAs were subjected to various conditioning protocols; break-in (applied current), in situ vs ex situ pre-treatment (water exposure), and elevated vs lowered temperature pre-treatment, which revealed a significant influence on hydrogen permeability.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001507290500001
DO  - DOI:10.1149/1945-7111/ade00f
UR  - https://juser.fz-juelich.de/record/1043173
ER  -