Journal of Physics D Applied Physics,
Journal Year:
2024,
Volume and Issue:
57(46), P. 465501 - 465501
Published: Aug. 15, 2024
Abstract
The
combination
of
heteroatoms
self-doping
and
nano-hierarchical-pore
structure
is
essential
in
improving
the
physicochemical
performance
gravi-volumetric
scale
supercapacitors
based
on
biomass-derived
carbon.
Herein,
this
study
used
aromatic
bio-organic
waste
from
nutmeg
leaves
(
Myristica
fragrans
Houtt
)
as
raw
materials
due
to
their
abundant
dopant
high-potential
unique
nano-pore
structure.
A
series
novel
treatments
were
carried
out
using
KOH
immersion
approach
bi-atmospheric
(in
N
2
CO
pyrolysis
ensure
presence
rich
a
defined
pore
results
showed
that
ratio
played
an
important
role
production
self-dopant
N,
O,
P.
In
addition,
significant
morphological
changes
observed
after
process.
optimized
material
prepared
at
500
mmol
g
−1
with
values
19.53%,
15.81%,
3.01%
for
P,
respectively.
surface
transformation
products
nano-hollow-fiber
size
8–12
nm
well-matched
micro-mesopores
(4:1).
2E-symmetric
system,
working
electrode
exhibited
high
gravimetric
capacitance
235
F
1
210
10
H
SO
4
electrolyte).
resulting
energy
output
was
relatively
32.64
Wh
kg
increased
power
density
(218
W
),
coulombic
efficiency
(92.67%),
retention
(89.78%).
findings
also
obtained
had
volumetric
256.30
cm
−3
35.00
l
.
Based
these
results,
selection
natural
well
application
produced
self-doped
P
carbon
boosting
behavior
supercapacitors.
Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
38(12), P. 11240 - 11252
Published: June 3, 2024
The
growing
demands
for
environmental
and
energy
sustainability
drive
the
development
of
storage
devices
with
high
power
densities
and,
consequently,
potential
electrode
materials.
conversion
biomass
waste
into
sustainable
materials
has
attracted
much
attention
in
scientific
community
applications.
In
this
work,
porous
carbon
is
derived
from
agricultural
biowaste
coconut
tree
(Cocos
nucifera)
husk.
This
activated
through
a
chemical
activation
method
using
different
activating
agents,
such
as
K2CO3,
KOH,
KMnO4,
KCl,
KBr,
KI.
Among
samples,
biomass-derived
KMnO4
agent
(AC3)
delivers
specific
surface
area
2333.4
m2
g–1
pore
volume
2.625
cm3
g–1,
which
results
excellent
electrochemical
performance,
gravimetric
capacitance
560
F
at
2
A
current
density
M
KOH
electrolyte
solution.
To
demonstrate
real-time
application,
symmetric
aqueous
(KOH)
gel
[poly(vinyl
alcohol)-PVA/KOH]
are
fabricated
AC3@graphite
sheet
positive
negative
electrodes.
device
achieves
276
g–1.
above
manifests
an
38.3
Wh
kg–1
1
kW
kg–1.
Besides,
cycle
stability
retains
98%
even
after
5000
cycles
10
density.
These
superior
outcomes
suggest
that
will
have
electric
double-layer
supercapacitors.
Langmuir,
Journal Year:
2024,
Volume and Issue:
40(28), P. 14266 - 14280
Published: June 28, 2024
Supercapacitors
store
energy
due
to
the
formation
of
an
electric
double
layer
(EDL)
at
interface
electrodes
and
electrolyte.
The
present
article
deals
with
finite
element
study
equilibrium
capacitance
(EDLC)
in
mixed
morphology
comprising
all
three
fundamental
crystal
structures,
simple
cubic
(SC),
body-centered
(BCC),
face-centered
morphologies
(FCC).
Mesoporous-activated
carbon
forms
electrode
supercapacitor
(C
Key engineering materials,
Journal Year:
2025,
Volume and Issue:
1007, P. 51 - 62
Published: March 4, 2025
Supercapacitor
is
an
energy
storage
device
that
has
electrodes,
electrolyte,
separator
and
current
collector
components.
In
this
study,
activated
carbon
electrode
material
with
turbostratic
structure
having
the
interlayer
spacing
(
d
002
)
of
3.550
Å,
porosity
specific
surface
area
S
BET
685
m
2
g
-1
was
used
to
prepare
electrodes
thickness
0.1,
0.3
0.5
mm
for
symmetrical
supercapacitor
cells,
respectively.
Electrochemical
tests
show
reduction
in
from
thickest
0.1
causes
specifics
capacitance,
power
cells
increase
by
factors
6,
5,
3.5
times,
respectively,
reach
values
37
F
kg
,
5
W
h
114
.
This
test
also
shows
length
time
domain
which
activation-controlled
mechanisms
dominantly
drives
voltage
decay
during
self-discharge
corresponding
rate,
are
longer
higher
cell
(0.1
mm),
Furthermore,
data
present
region
dominant
diffusion-controlled
mechanism
(0.5
mm)
but
absence
such
other
cells.
