Batteries,
Journal Year:
2024,
Volume and Issue:
10(12), P. 438 - 438
Published: Dec. 10, 2024
Supercapacitors
are
a
kind
of
energy
storage
device
that
lie
between
traditional
capacitors
and
batteries,
characterized
by
high
power
density,
long
cycle
life,
rapid
charging
discharging
capabilities.
The
mechanism
supercapacitors
mainly
includes
electrical
double-layer
capacitance
pseudocapacitance.
In
addition
to
constructing
multi-level
pore
structures
increase
the
specific
surface
area
electrode
materials,
defect
engineering
is
essential
for
enhancing
electrochemical
active
sites
achieving
additional
extrinsic
Therefore,
developing
simple
efficient
method
essential.
Atomic
layer
deposition
(ALD)
technology
enables
precise
control
over
thin
film
thickness
at
atomic
level
through
layer-by-layer
deposition.
This
capability
allows
intentional
introduction
defects,
such
as
vacancies,
heteroatom
doping,
or
misalignment,
within
material.
ALD
process
can
regulate
defects
in
materials
without
altering
overall
structure,
thereby
optimizing
both
physical
properties
materials.
Its
self-limiting
reaction
also
ensures
doping
introduced
uniformly
across
material
surface.
uniform
distribution
particularly
profitable
electrodes
supercapacitor
applications,
it
promotes
consistent
performance
entire
electrode.
review
systematically
summarizes
latest
advancements
via
supercapacitors,
including
enhancement
conductivity
ALD,
improving
density
device.
Furthermore,
we
discuss
underlying
mechanisms,
advantages,
future
directions
this
field.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 4, 2025
Abstract
Microscale,
wire‐shaped
flexible
supercapacitors
are
gaining
significant
attention
due
to
the
growing
demand
for
wearable
electronics
and
microrobotic
technologies.
Among
various
materials,
copper
sulfide
stands
out
as
an
ideal
candidate
because
of
its
superior
electrochemical
properties,
which
can
be
attributed
nanostructured
composition.
This
structure
enhances
surface
area,
reduces
ion
transport
distances,
improves
charge–discharge
kinetics.
However,
conventional
electrode
synthesis
methods—such
annealing
hydrothermal
processes—are
limited
by
long
production
times
scalability
issues,
making
them
unsuitable
supercapacitor
development.
In
this
study,
innovative
fabrication
technique
using
atmospheric
pressure
plasma
jet
(APPJ)
both
treatment
material
is
proposed.
By
integrating
APPJ
with
a
winding
mechanism,
roll‐to‐roll
processing
continuous
enabled,
significantly
enhancing
manufacturing
process.
The
fabricated
microscale
electrodes
demonstrate
high
specific
capacitance
(153.39
mF
cm
−2
),
energy
density
(15.48
µWh
excellent
retention
(91.32%)
after
30
000
cycles.
Furthermore,
solid‐state
asymmetric
assembled
in
coaxial
configuration.
exhibits
exceptional
flexibility
storage
performance,
underscoring
practical
applicability
proposed
method
advanced
electronics.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 5, 2025
Multicomponent
transition
metal
heterostructures
is
constructed
through
a
heteroatomic
doping
method
sandwiched
by
the
dual
carbon
layers.
The
promising
strategy
combines
iron
and
manganese
ions
into
novel
Fe2.57Mn0.43O4
heterostructure
on
surface
of
rGO
nanosheets,
followed
sulfur-doping
calcination
processes
to
achieve
[email protected]@C
heterostructure.
Note
that
S2--doped
nanorods
encapsulated
coating
layers
nanosheets
as
backbone
are
expected
restrict
from
collapsing
during
charge-discharge
processes.
S2--doping
in
can
build
stabilized
solid
electrolyte
interphase
or
near
nanorods.
Moreover,
Mn
optimize
crystalline
structure
Fe2.57Mn0.43O4.
exposed
active
sites
kinetics
significantly
improved.
As
result,
as-assembled
batteries
high
capacitance
1410
F
g-1
at
1
A
with
retention
75%
16
g-1.
Furthermore,
guaranteed
prolonged
cycle
life
1000
cycles
92.3%
retention.
NiAl-LDH
(Ni-Al
layered
double
hydroxide)//[email protected]@C
battery
leads
excellent
electrochemical
properties
(65.4
Wh
kg-1
763.2
W
kg-1,
9925.8
43.9
kg-1).
InfoMat,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 11, 2025
Abstract
MXenes,
a
class
of
two‐dimensional
(2D)
transition
metal
carbides,
and
covalent
organic
frameworks
(COFs)
deliver
unique
structural
electrochemical
properties,
making
them
promising
candidates
for
energy
storage
conversion
applications.
MXenes
exhibit
excellent
conductivity
tunable
surface
chemistries,
whereas
the
COFs
provide
high
porosity
versatility.
Recent
advances
in
integrating
MXene‐COF
composites
have
revealed
their
potential
to
enhance
charge
transfer
storage/conversion
properties.
The
work
highlights
key
developments
integration,
offering
insights
into
applications
batteries
(Li‐ion,
K‐ion,
Na‐ion,
Li‐S),
supercapacitors,
electrocatalysis
(HER,
OER,
RR,
NRR,
ORRCO2),
while
also
addressing
current
challenges
future
directions
not
only
but
other
electronic
devices.
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