Polymers,
Год журнала:
2023,
Номер
15(19), С. 3879 - 3879
Опубликована: Сен. 25, 2023
This
paper
proposes
a
different
strategy
for
deriving
carbon
materials
from
biomass,
abandoning
traditional
strong
corrosive
activators
and
using
top−down
approach
with
mild
green
enzyme
targeted
to
degrade
the
pectin
matrix
in
inner
layer
of
pomelo
peel
cotton
wool,
inducing
large
number
nanopores
on
its
surface.
Meanwhile,
additional
hydrophilic
groups
produced
via
an
enzymatic
treatment
can
be
used
effectively
anchor
metallic
iron
atoms
prepare
porous
uniformly
dispersed
Fe−Nx
structures,
this
case
optimizing
sample
PPE−FeNPC−900’s
specific
surface
area
by
up
1435
m2
g−1.
PPE−FeNPC−900
is
as
electrode
material
6
M
KOH
electrolyte;
it
manifests
decent
capacitance
400
F
The
assembled
symmetrical
supercapacitor
exhibits
high
energy
density
12.8
Wh
kg−1
at
300
W
power
excellent
cycle
stability.
As
catalyst,
also
half−wave
potential
0.850
V
(vs.
RHE)
diffusion-limited
current
5.79
mA
cm−2
0.3
RHE).
It
has
higher
electron
transfer
lower
hydrogen
peroxide
yield
compared
commercial
Pt/C
catalysts.
green,
simple,
efficient
designed
study
converts
abundant,
low−cost
waste
biomass
into
high-value
multifunctional
materials,
which
are
critical
achieving
applications.
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Март 28, 2024
Abstract
This
investigation
reported
a
one-step
green
synthesis
of
nickel
oxide
nanoparticles
(NiO
NPs)
using
aloe
vera
leaves
extract
solution
for
their
application
in
supercapacitor.
method
used
as
reducing
agent,
which
is
very
simple
and
cost-effective.
The
synthesized
NPs
were
thoroughly
characterized
various
techniques.
X-ray
diffraction
analysis
unequivocally
confirmed
the
crystalline
nature;
field
emission
scanning
electron
microscopy
transmission
images
showed
different
shapes
forms
an
agglomerated
cluster
NPs.
absorption
spectra
recorded
from
UV
visible
spectroscopy,
while
Fourier
transform
infrared
spectroscopy
provided
insights
into
functional
groups
present.
Electrochemical
assessments
carried
out
via
cyclic
voltammetry,
galvanostatic
charging-discharging
electrochemical
impedance
spectroscopy.
These
experiments
performed
2
M
KOH
electrolyte
within
1.0
V
potential
window.
Impressively,
single
electrode
displayed
remarkable
specific
capacitance
462
F
g
−1
at
scan
rate
1
mV
s
336
current
density
0.76
A
.
Further,
symmetric
two-electrode
device
(NiO||NiO)
has
been
successfully
fabricated
by
employing
separator
between
electrodes.
exhibited
exceptional
approximately
239
,
along
with
energy
47.8
Wh
kg
power
545
W
1.2
also
shows
retention
capacity
89%
10
after
2000
cycles
114%
columbic
efficiency.
present
study
underscores
effectiveness
approach
producing
NiO
establishes
highly
promising
candidates
supercapacitor
applications,
showcasing
both
excellent
performance
three-electrode
system
stability
practical
device.
results
collectively
highlight
efficacy
NPs,
establishing
its
candidate
application.
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(20), С. 11920 - 11935
Опубликована: Янв. 1, 2024
A
novel
strategy
is
developed
for
the
preparation
of
chitosan-derived
ant-nest-like
hierarchical
porous
carbons
(AH-PCs),
which
exhibit
excellent
electrochemical
performances
both
supercapacitors
and
zinc-ion
hybrid
capacitors.
ABSTRACT
Biomass‐derived
carbons
are
eco‐friendly
and
sustainable
materials,
making
them
ideal
for
supercapacitors
due
to
their
high
surface
area,
excellent
conductivity,
cost‐effectiveness,
environmental
benefits.
This
review
provides
valuable
insights
into
biomass‐derived
carbon
modified
supercapacitors,
integrating
both
experimental
results
theoretical
calculations.
begins
by
discussing
the
origins
of
in
including
plant‐based,
food
waste‐derived,
animal‐origin,
microorganism‐generated
sources.
Then,
this
presents
strategies
improve
performance
heteroatom
doping,
functionalization,
hybrid
composite
construction.
Furthermore,
analyzes
functions
its
pure
form
as
materials.
The
also
explores
composites
derived
from
biomass‐based
carbon,
carbon/MXenes,
carbon/MOFs,
carbon/graphene,
carbon/conductive
polymers,
carbon/transition
metal
oxides,
carbon/hydroxides,
providing
a
thorough
investigation.
Most
importantly,
offers
an
innovative
summary
analysis
role
through
calculations,
concentrating
on
four
key
aspects:
energy
band
structure,
density
states,
electron
cloud
density,
adsorption
energy.
Finally,
concludes
future
research
directions
biomass
carbon‐based
discovery
novel
tailoring
functional
groups,
fabricating
high‐performance
exploring
ion
transfer
mechanisms,
enhancing
practical
applications.
In
summary,
exploration
sources,
functions,
mechanisms
research.
