Journal of Energy Storage,
Год журнала:
2023,
Номер
77, С. 109723 - 109723
Опубликована: Дек. 27, 2023
Metal
oxide-biochar
composites
have
become
a
promising
class
of
materials
for
supercapacitor
applications.
The
incorporation
metal
oxides
into
the
biochar
matrix
offers
several
advantages,
including
improved
capacitance,
stability,
ion
diffusion,
and
conductivity.
synergistic
interactions
between
result
in
enhanced
capacitance
stability
composites.
Biochar's
porous
nature
makes
transport
easier,
which
improves
energy
storage
capabilities
speeds
up
charge-discharge
rates.
Additionally,
addition
composites'
conductivity,
facilitating
effective
electron
transport.
However,
research
gaps
still
remain
despite
these
developments,
requiring
optimization
composition
structural
features
as
well
their
synthesis
approaches.
Furthermore,
order
to
precisely
control
characteristics
composites,
greater
comprehension
mechanism
underlying
creation
is
necessary.
This
agenda
calls
new
with
electrochemical
performance
using
diverse
oxide
precursors
made
from
various
agricultural
wastes.
article
summarizes
recent
developments
waste
upcoming
supercapacitors.
We
believe
findings,
terms
fundamentals,
development,
challenges,
future
prospects,
this
review
would
be
beneficial
readers
will
facilitate
concerned
era.
Energy & Fuels,
Год журнала:
2024,
Номер
38(12), С. 11240 - 11252
Опубликована: Июнь 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.
C – Journal of Carbon Research,
Год журнала:
2023,
Номер
9(4), С. 109 - 109
Опубликована: Ноя. 14, 2023
High-surface-area
porous
carbon
materials
with
high
porosity
and
well-defined
pore
structures
are
the
preferred
advanced
supercapacitors
electrode
materials.
Here,
we
report
electrochemical
supercapacitive
performance
of
novel
high-porosity
activated
prepared
from
biowaste
Terminalia
chebula
(Harro)
seed
stones
involving
zinc
chloride
(ZnCl2)
activation.
Activation
is
achieved
by
mixing
ZnCl2
Harro
powder
(1:1
w/w)
followed
carbonization
at
400–700
°C
under
a
nitrogen
gas
atmosphere.
The
amorphous
obtained
exhibit
excellent
as
electrical
double-layer
capacitor
electrodes
in
aqueous
electrolyte
(1
M
sulfuric
acid)
due
to
specific
surface
areas
(as
1382.6
m2
g−1)
based
on
well-developed
micropore
mesopore
structures,
partial
graphitic
structure
containing
oxygenated
functional
groups.
An
using
material
having
optimal
textural
properties
large
capacitance
328.6
F
g−1
1
A
three-electrode
cell
setup.
good
retention
44.7%
50
current
density
outstanding
cycling
98.2%
even
following
10,000
successive
charge/discharge
cycles.
Electrochemical
data
indicate
significant
potential
seed-derived
carbons
high-performance
for
high-energy-storage
supercapacitor
applications.
