Materials,
Journal Year:
2024,
Volume and Issue:
18(1), P. 80 - 80
Published: Dec. 27, 2024
Due
to
its
low
cost,
natural
abundance,
non-toxicity,
and
high
theoretical
capacitance,
cobalt
oxide
(CoO)
stands
as
a
promising
candidate
electrode
material
for
supercapacitors.
In
this
study,
binder-less
molybdenum
doped
CoO
(Mo@CoO)
integrated
electrodes
were
one-step
fabricated
using
simple
electric
discharge
corrosion
(EDC)
method.
This
EDC
method
enables
the
direct
synthesis
of
Mo@CoO
active
materials
with
oxygen
vacancy
on
substrates,
without
any
pre-made
templates,
conductive
additives,
or
chemicals.
Most
importantly,
precise
control
over
processing
parameter
pulse
width,
which
facilitates
tailoring
surface
morphologies
as-prepared
materials.
It
was
found
that
based
symmetric
supercapacitor
prepared
by
width
24
μs
(Mo@CoO-SCs24)
achieved
maximum
areal
capacitance
36.0
mF
cm−2
(0.15
mA
cm−2),
is
1.83
1.97
times
higher
than
Mo@CoO-SCs12
Mo@CoO-SCs36.
Moreover,
Mo@CoO-SCs24
devices
could
be
worked
at
10
V
s−1,
demonstrates
their
fast
charge/discharge
characteristic.
These
results
demonstrated
significant
potential
strategy
efficiency
fabricating
various
metal
applications,
like
supercapacitors,
batteries
sensors.
Materials Advances,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
A
promising
microsupercapacitor
design
was
achieved
by
printing
conductive
ink
composed
of
porous
Co
3
O
4
nanoparticles
derived
from
ZIF-67
with
in
situ
reduced
graphene
oxide
(rGO)
growth
via
thermal
reduction.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 30, 2025
Abstract
The
electrochemical
properties
are
influenced
by
the
surface‐active
sites
and
porosity
of
materials
in
solid‐state
asymmetric
supercapacitor
(SSASC)
devices.
Transitioning
from
two‐dimensional
(2D)
bulk
to
three‐dimensional
(3D)‐printed
electrodes
for
high‐performance
SSASCs
remains
both
exciting
challenging.
This
work,
first
time,
introduces
a
novel
oxygen‐rich
Co
3
O
4
/CeO
2
nanocomposite
(CCNC)
ink
with
optimized
rheological
constructing
vertically
aligned
(3‐layer
5‐layer)
direct
writing
(DIW)
3D‐printed
SSASC
porous
architectures.
5‐layer
CCNC
(3DP‐5LCCNC)
device
demonstrates
remarkable
mass
loading
18.61
mg
cm
−2
,
achieving
an
excellent
areal
capacitance
7.09
F
.
3DP‐5LCCNC
is
≈8.7
times
greater
than
that
(0.82
)
1.47
higher
3DP‐3LCCNC
(4.8
).
Furthermore,
electrode
exhibits
exceptional
energy
density
2.366
mWh
significantly
surpassing
(0.273
(1.626
enhancement
attributed
architecture,
facilitating
ion
transport
enhances
kinetic
reactions.
work
presents
innovative
approach
formulation
provides
framework
designing
rapid
transportation
outstanding
advanced
storage
