Advanced Electronic Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 15, 2025
Abstract
In
the
pursuit
of
energy
storage
devices
offering
high
power
density,
rapid
charge
and
discharge
rates,
a
layer‐by‐layer
deposition
approach
is
shown
to
improve
capacitive
properties
conducting
polymer‐based
devices.
This
work
describes
synthesis
characterization
composite
material
based
on
poly(3,4‐ethylenedioxythiophene)
(PEDOT)
poly(3,4‐ethylenedioxypyrrole)
(PEDOP)
for
supercapacitor
applications.
PEDOT
PEDOP
are
sequentially
electropolymerized
using
cyclic
voltammetry
form
bilayer
structures,
overcoming
challenges
associated
with
copolymerization.
The
evaluation
electrochemical
performance
PEDOT/PEDOP
reveals
superior
areal
capacitance
(42.2
±
2.8
mF
cm
−2
at
scan
rate
5
mV
s
−1
)
outperforming
both
homopolymers
by
up
30%.
Microscopic
spectroscopic
surface
analysis
confirm
uniform
coating
enhanced
roughness
resulting
from
formation
3D
nanostructures,
contributing
improved
performance.
Further
impedance
demonstrates
low
transfer
resistance
(25
8
Ω)
density
respect
area
electrode
(3.53
0.3
µWh
55
µW
),
making
promising
high‐performance
supercapacitors.
Journal of Applied Polymer Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 8, 2025
ABSTRACT
In
this
work,
we
design
poly(4,4′‐diphenylether‐5,5′‐bibenzimidazole)
(OPBI)
as
a
promising
electrolyte
membrane
for
high‐performance
flexible
supercapacitors.
The
solid‐polymer
is
designed
by
immersing
the
OPBI
in
phosphoric
acid
(H
3
PO
4
)
and
it
was
paired
with
polyaniline
(PANI)‐treated
multiwall
carbon
nanotubes
(TMWCNTs)
or
poly(3,4‐ethylenedioxythiophene)‐poly
(styrene
sulfonate)
(PEDOT:
PSS)
TMWCNTs
active
electrode
materials.
Specifically,
PANI/TMWCNT‐based
supercapacitor,
integrated
(OPBIME),
demonstrated
high
specific
capacitance
(Cs)
of
519
F/g
at
current
density
2.2
A/g.
contrast,
conventional
cellulose‐PVA
gel
yielded
reduced
405
under
same
conditions.
Further
testing
PEDOT:
PSS/TMWCNT
electrodes
OPBIME
resulted
14
0.5
A/g,
along
excellent
retention
92%
after
2000
cycles.
Overall,
these
findings
highlighted
dual
role
membranes
both
an
separator,
significantly
improving
performance
Their
ionic
conductivity,
electrochemical
stability,
flexibility
enable
superior
long‐term
cycling
positioning
them
next‐generation
energy
storage
applications.
