Effect of relative humidity and temperature on the mechanical properties of PFSA Nafion™-cation-exchanged membranes for electrochemical applications
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Abstract
Perfluorosulfonic
acid
(PFSA)
polymer
membranes,
also
known
as
PEM
(proton
-
exchange
membranes),
such
as
Nafion
™
are
widely
used
as
electrolyte
thin
films
in
electrochemical
hydrogen
energy
systems
such
as
fuel
cells,
electrolysers
and
electrochemical
hydrogen
compressors.
In
the
present
work
the
effect
of
temperature
and
relative
humidity
on
the
elastic
moduli
of
various
PEMs
were
investigated
through
uniaxial
and
biaxial
tensile
testing.
Results
of
the
two
techniques
were
analysed
and
compared
to
one
another
to
determine
the
validity
of
bulge
testing
in
the
investigation
of
the
mechanical
properties
of
PEMs.
The
b
ulge
test
technique
was
applied
to
assess
the
effect
of
elevated
temperatures,
humidity
levels
and
cation
contamination
on
the
rupture
pressure
of
the
membranes.
The
effects
of
cation
exchange
and
water
absorption
on
the
mechanical
strength
of
PEMs
are
di
scussed
in
terms
of
cation
water
interactions
within
the
molecular
structure
of
PFSA
polymers
Sustainable Development Goals
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Citation
Kirsten, W. et al. 2017. Effect of relative humidity and temperature on the mechanical properties of PFSA Nafion™-cation-exchanged membranes for electrochemical applications. International journal of electrochemical science, 12(3):2573-2582. [https://doi.org/10.20964/2017.03.57]