Carbon Trends,
Journal Year:
2024,
Volume and Issue:
15, P. 100359 - 100359
Published: May 1, 2024
In
this
study,
the
electrochemical
properties
of
bioderived
activated
carbon-based
electrodes
for
supercapacitors
formed
using
a
sintered
ceramic
binder
were
investigated.
Activated
carbon
derived
from
Jack
wood
tree
(Artocarpus
heterophyllus)
with
variable
amounts
TiO2
nanoparticles
as
binder,
used
in
order
to
get
good,
films
on
FTO
substrates.
No
other
binders
study
since
most
conventional
devastate
electrical
conductivity
films.
Furthermore,
has
higher
temperature
tolerance
compared
polymeric
thus
electrode
prepared
can
be
wider
applications.
A
series
double-layer
capacitors
fabricated
and
characterized
by
cyclic
voltammetry
galvanostatic
charge-discharge
measurements.
The
showed
capacitive
behavior.
that
contain
90
%
10
show
optimum
performance
along
an
impressive
specific
capacitance
147
F
g−1
at
2
mV
s−1
scan
rate.
This
supercapacitor
exhibits
power
density
68.5
W
kg−1
while
energy
is
8.02
Wh
kg−1.
When
high
1186.51
drops
5.71
According
measurements
taken
1000
cycles,
shows
excellent
cycle
stability
without
any
traces
drop.
The Journal of Physical Chemistry C,
Journal Year:
2023,
Volume and Issue:
127(41), P. 20197 - 20206
Published: Oct. 6, 2023
Two-dimensional
(2D)
transition
metal
carbides
and
nitrides
are
among
the
newest,
probably
largest,
families
of
2D
materials
that
have
been
discovered.
They
shown
promise
in
many
applications,
such
as
electromagnetic
shielding,
energy
storage
devices
like
batteries
supercapacitors,
transparent
conductive
electrodes,
catalysts
for
hydrogen
production,
several
others.
Their
general
formula
is
Mn+1XnTz
(n
=
1–4)
or
M1.33XTz,
where
M
an
early
metal,
X
carbon
and/or
nitrogen,
Tz
represents
various
terminations
present
upon
etching
Al
layer.
The
first
MXene
discovered,
Ti3C2Tz,
was
synthesized
by
aluminum
(Al)
from
nanolaminated
MAX
phase
Ti3AlC2
using
hydrofluoric
acid
(HF).
Since
discovery
Ti3C2Tz
2011,
more
than
30
other
chemistries
reported
with
different
elements.
It
has
observed
that,
expected,
changing
chemistry
also
influences
properties
range
applications
listed
above,
allowing
us
to
tailor
them
according
what
suits
application
interest
best.
Unlike
success
tailoring
elements
over
years,
attempts
engineer
was,
until
recently,
a
challenge.
A
series
recent
discoveries
improved
understanding
surface
now
rendered
customization
possible.
This
progress
added
new
“knob”
can
be
turned
further
tune
properties.
majority
this
Perspective
focused
on
terminations:
their
engineering,
characterization,
effect
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(43)
Published: June 21, 2023
Abstract
Insufficient
and
unstable
energy
output
is
the
bottleneck
issue
radically
restricting
application
of
micro‐supercapacitors
(MSCs).
Herein,
an
interlayer
atom
injection
strategy
that
can
anchor
low‐valence
Zn
atoms
(Zn
δ
+
,
0
<
<2)
on
O‐terminals
Ti
3
C
2
T
x
(MXene)
flakes
within
MXene/silver‐nanowires
hybrid
cathode
symmetric
MSCs
first
presented.
Combining
polyacrylamide/ZnCl
hydrogel
electrolyte
rich
in
Cl
−
2+
ions,
matched
/Zn
(−0.76
V
vs
SHE)
Ag/AgCl
(0.23
SHE),
redox
couples
between
symmetrical
electrodes
are
activated
to
offer
faradaic
charge
storage
beside
ions‐intercalation
involved
pseudocapacitance.
Thus,
a
battery‐type
voltage
plateau
(≈0.9
V)
appears
discharge
curve
fabricated
pseudo‐symmetric
micro‐redox
capacitor,
simultaneously
achieving
density
enhancement
(117
µWh
cm
−2
at
0.5
mA
)
substantially
improved
power
stability
(46%
from
region)
relative
before
activation
(98
without
platform).
The
work
provides
fire‐new
overcome
performance
bottlenecks
confronting
conventional
MSCs.
Small Methods,
Journal Year:
2023,
Volume and Issue:
7(8)
Published: Feb. 19, 2023
Abstract
X‐rays
are
a
penetrating
form
of
high‐energy
electromagnetic
radiation
with
wavelengths
ranging
from
10
pm
to
nm.
Similar
visible
light,
provide
powerful
tool
study
the
atoms
and
elemental
information
objects.
Different
characterization
methods
based
on
established,
such
as
X‐ray
diffraction,
small‐
wide‐angle
scattering,
X‐ray‐based
spectroscopies,
explore
structural
varied
materials
including
low‐dimensional
nanomaterials.
This
review
summarizes
recent
progress
using
related
in
MXenes,
new
family
2D
These
key
nanomaterials,
covering
synthesis,
composition,
assembly
MXene
sheets
their
composites.
Additionally,
proposed
future
research
directions
outlook
section
enhance
understanding
surface
chemical
properties.
is
expected
guideline
for
method
selection
aid
precise
interpretation
experimental
data
research.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(8), P. 6243 - 6255
Published: Feb. 12, 2024
Efficient
catalysts
with
minimal
content
of
catalytically
active
noble
metals
are
essential
for
the
transition
to
clean
hydrogen
economy.
Catalyst
supports
that
can
immobilize
and
stabilize
catalytic
nanoparticles
facilitate
supply
electrons
reactants
needed.
Being
hydrophilic
more
conductive
compared
carbons,
MXenes
have
shown
promise
as
catalyst
supports.
However,
controlled
assembly
their
2D
sheets
creates
a
challenge.
This
study
established
lattice
engineering
approach
regulate
exfoliated
Ti3C2Tx
MXene
nanosheets
guest
cations
various
sizes.
The
enlargement
led
decreased
interlayer
interaction
lamellae
increased
surface
accessibility,
allowing
intercalation
Pd
nanoparticles.
Stabilization
between
interlayer-expanded
improved
electrocatalytic
activity.
Pd-immobilized
K+-intercalated
(PdKMX)
demonstrated
exceptional
performance
evolution
reaction
lowest
overpotential
72
mV
(@10
mA
cm–2)
highest
turnover
frequency
1.122
s–1
(@
an
100
mV),
which
were
superior
those
state-of-the-art
nanoparticle-based
electrocatalysts.
Weakening
during
self-assembly
K+
ions
fewer
layers
in
expansion
c
direction
anchoring,
providing
numerous
surface-active
sites
promoting
mass
transport.
In
situ
spectroscopic
analysis
suggests
effective
interfacial
electron
injection
from
strongly
immobilized
on
PdKMX
may
be
responsible
performance.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 17, 2024
Abstract
Developing
green
and
efficient
preparation
strategies
is
a
persistent
pursuit
in
the
field
of
2D
transition
metal
nitrides
and/or
carbides
(MXenes).
Traditional
etching
methods,
such
as
HF‐based
or
high‐temperature
Lewis‐acid‐molten‐salt
route,
require
harsher
conditions
exhibit
lower
efficiency
with
limited
scalability,
severely
constraining
their
commercial
production
practical
application.
Here,
an
ultrafast
low‐temperature
molten
salt
(LTMS)
method
presented
for
large‐scale
synthesis
diverse
MXenes
within
minutes
by
employing
NH
4
HF
2
etchant.
The
increased
thermal
motion
improved
diffusion
molecules
significantly
expedite
process
MAX
phases,
thus
achieving
Ti
3
C
T
x
MXene
just
5
minutes.
universality
LTMS
renders
it
valuable
approach
rapid
various
MXenes,
including
V
,
Nb
Mo
TiC
CT
.
easy
to
scale
up
can
yield
more
than
100
g
single
reaction.
obtained
LTMS‐MXene
exhibits
excellent
electrochemical
performance
supercapacitors,
evidently
proving
effectiveness
method.
This
work
provides
ultrafast,
universal,
scalable
MXenes.
