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@INPROCEEDINGS{Mitra:1050361,
author = {Mitra, Souvik},
title = {{METAL} {POISONING} {OF} {NAFION} {PROTON} {EXCHANGE}
{MEMBRANE}},
reportid = {FZJ-2026-00148},
year = {2025},
abstract = {Metal-ion contamination of Nafion proton-exchange membranes
(PEMs) remains a persistent durability and performance issue
in PEM fuel cells. Metal cations originating from
insufficiently deionized feed water, coolant leaks, or
corrosion of metallic cell components can exchange with
protons at the sulfonate groups (SO₃⁻) of Nafion,
thereby reducing proton conductivity and overall cell
performance.In this work, we combine atomistic molecular
dynamics simulations with in-plane conductivity measurements
to build a consistent picture of how a broad series of
mono-, di-, and trivalent cations affect transport in Nafion
under comparable conditions. For monovalent ions (Li⁺,
Na⁺, and K⁺), our study reveals a reversal of the
familiar mobility trend of these cations in the presence of
Nafion membrane compared to bulk water, reflecting the
competition between ion hydration and specific binding to
the SO₃⁻ groups of Nafion.},
organization = {(Germany)},
subtyp = {Other},
cin = {IET-1},
cid = {I:(DE-Juel1)IET-1-20110218},
pnm = {1231 - Electrochemistry for Hydrogen (POF4-123)},
pid = {G:(DE-HGF)POF4-1231},
typ = {PUB:(DE-HGF)31},
url = {https://juser.fz-juelich.de/record/1050361},
}