Poly(aryl
piperidinium)
backbone
has
excellent
conductivity
and
chemical
stability,
making
it
an
ideal
material
for
the
manufacture
of
anion
exchange
membrane
fuel
cells
(AEMFCs).
Hence,
in
this
research
we
prepared
a
series
high
performance
AEMs
by
introducing
electron-rich
dibenzothiophene
(DBT)
monomer
into
poly(aryl
polymer
backbone.
The
larger
conjugated
surface
DBT
presence
heteroatoms
facilitated
intermolecular
interactions
between
polymers,
which
induced
generation
highly
efficient
ion-transport
channels
within
membranes,
as
evidenced
atomic
force
microscopy
(AFM)
images.
highest
molar
addition
monomer,
QPDBTTP-25
membrane,
showed
(190.90
mS
cm-1
at
80
°C)
while
maintaining
robust
dimensional
stability
(swelling
ratio
was
23.66
%
°C).
Owing
to
advantages
backbone,
also
exhibited
mechanical
properties
(tensile
strength
53.03
MPa
under
fully
hydrated
condition)
durable
(conductivity
retention
remained
93.2%
after
being
immersed
2
M
NaOH
solution
°C
1500
h).
H2/O2
cell
test
utilizing
produced
peak
power
density
367
mW
cm-2
°C.
Next Energy,
Journal Year:
2023,
Volume and Issue:
1(4), P. 100075 - 100075
Published: Oct. 20, 2023
The
use
of
strong
intermolecular
interaction
force
to
promote
the
formation
ion
transport
channels
is
one
common
methods
increase
conductivity
AEMs.
In
this
work,
a
series
poly(acenaphthylenyl
aryl
piperidinium)
membranes
and
ionomer
were
prepared
by
ultra-strong
acid-catalyzed
polymerization.
π-π
self-assembly
acenaphthylene
monomer
promoted
aggregation
piperidinium
cation
efficient
channel,
which
was
confirmed
well
aggregated
transmission
electron
micrographs
clusters.
Therefore,
membrane
had
desirable
(173.38
mS
cm−1
at
80
°C).
Meanwhile,
exhibited
excellent
alkaline
stability
(99
%
retention
in
3
M
NaOH
solution
immersed
°C
for
1000
h),
acceptable
dimensional
(swelling
rate
<
27.78
°C),
high
mechanical
properties
(tensile
strength
>33.9
MPa).
H2/O2
fuel
cell
assembled
based
on
QPANTP-20
peak
power
density
266
mW
cm−2
°C.
