Self-supporting
electrodes
for
supercapacitors
and
hydrogen
evolution
are
essential
the
development
of
clean
electrochemical
energy
conversion
storage
devices.
Herein,
a
self-supporting
Co3S4/NiS/CNT/NF
electrode
was
constructed
via
Ni-induced
self-assembly
carbon
nanotube
(CNT)
film
on
Ni
foam
followed
by
Co3S4/NiS
nanowire
growth
hydrothermal
process.
The
exhibits
high
specific
capacitance
(2889
F/g)
excellent
rate
capability.
Co3S4/NiS/CNT/NF//AC/NF
asymmetric
supercapacitor
exhibited
remarkable
cycling
stability
density
(83.3
Wh/kg
at
500
W/kg).
In
addition,
has
durability
activity
(62
mV
10
mA/cm2).
hierarchical
three-dimensional
network
structure,
synergistic
effect
between
CNTs,
strong
binding
force
favor
fast
electron/ion
transfer,
more
exposed
active
sites,
faradic
redox
reaction,
which
crucial
performances
electrode.
This
work
provides
insight
into
design
multifunctional
electrocatalysis
applications.
Advanced Composites and Hybrid Materials,
Journal Year:
2025,
Volume and Issue:
8(1)
Published: Jan. 14, 2025
The
performance
of
polycrystalline
diamond
(PCD)
tools
largely
depends
on
the
adhesion
and
catalyzing
effect
binder
phase.
In
this
study,
AlCoCrFeNi2.1
eutectic
high-entropy
alloy
(HEA)
was
used
as
a
new
material
to
synthesize
PCD
samples.
First-principles
calculations
showed
that
interface
strength
between
HEA
is
better
than
cobalt
diamond,
suggesting
HEA/PCD
combination
has
potential
exhibit
properties
conventional
cobalt/PCD
tools.
samples
with
phase
were
successfully
synthesized
using
high-pressure
high-temperature
conditions
8.0
GPa
1500–1700℃.
Several
key
indicators,
including
thermal
expansion
coefficient,
Vickers
hardness,
transverse
rupture
strength,
compressive
wear
resistance
measured
comprehensively
evaluate
overall
well-sintered
HEA/PCD.
results
that,
compared
cobalt/PCD,
exhibited
lower
coefficient
reduced
graphitization
at
high
temperatures
above
920
K.
also
demonstrated
mechanical
Co/PCD,
higher
greater
strength.
Moreover,
over
same
cutting
distance
against
granite
block,
significantly
loss
indicating
superior
resistance.
This
study
provides
insights
strategies
for
design
optimization
binders
ACS Applied Energy Materials,
Journal Year:
2024,
Volume and Issue:
7(20), P. 9121 - 9133
Published: Oct. 8, 2024
The
preparation
of
clean
and
sustainable
renewable
energy
requires
the
development
bifunctional
electrocatalysts
with
high
stability
activity
for
oxygen
evolution
reaction
(OER)
hydrogen
(HER).
Doping
Ga
in
catalyst
can
enhance
catalytic
reaction.
In
this
study,
we
added
different
amounts
to
FeCoNiCuTi
HEAs
make
(FeCoNiCuTi)100–xGax
(x
=
1,
2,
3,
5,
10,
16.67)
a
cost-effective
HER/OER
electrocatalyst
that
showed
excellent
electrocatalytic
alkaline
electrolyte.
At
current
density
10
mA/cm2,
it
has
an
overpotential
47
mV,
Tafel
slope
35.75
mV/dec,
electric
double-layer
capacitance
36.8
mF/cm2,
which
performance
HER
same
density,
OER
is
345.56
33.9
31.24
comparable
overcapacitance
inert
catalyst.
This
makes
highly
efficient
integral
water
splitting.
Density
functional
theory
(DFT)
calculations
have
shown
chemical
complexity
provides
strong
synergistic
effect
changing
electronic
structure.
work
focuses
on
possibility
adding
elements
high-entropy
alloys
HER/OER.
Batteries & Supercaps,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 22, 2025
Abstract
In
this
study,
transition
metal
sulfide‐based
binder‐free
hybrid
electrodes
were
grown
in‐situ
on
Ni
foam
using
hydrothermal
method.
However,
it
still
remains
a
challenge
for
designing
heterostructure
with
sufficient
electroactive
sites
to
improve
electrochemical
performance.
Herein,
effects
of
CNF@NSNCS
composites
investigated
developing
high‐performance,
low‐cost
supercapacitors.
By
avoiding
the
use
additive
binding
polymers,
purity
was
enhanced,
resulting
in
excellent
behavior.
The
prepared
composite
electrode
exhibited
an
ultrahigh
specific
capacitance
2739
F/g
at
current
density
1
A/g,
superior
retention
charge‐discharge
cycle
stability
100
%
over
continuous
14,000
cycles
10
A/g.
Furthermore,
asymmetric
supercapacitor
(ASC)
assembled
as
positive
and
Activated
carbon
(AC)
negative
electrode.
devices
demonstrated
performance,
delivering
high
energy
77.5
Wh/kg
power
748.4
W/kg.
This
work
may
contribute
advancing
development
low‐cost,
high‐performance
storage
applications
next
generation
portable
electronic
devices.
Nano Letters,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 10, 2025
Realizing
ultrahigh
area
capacitance
based
on
suitable
electrodes
is
a
challenge
for
supercapacitors.
In
this
work,
an
electrode
designed
consisting
of
Co9S8
nanotubes
and
NiWO4
nanoparticles
(named
Co9S8@NiWO4)
fabricated
by
hydrothermal
process.
The
Co9S8@NiWO4
realizes
record
18.8
F
cm-2
at
current
density
5
mA
among
the
reports
in
literature.
corresponding
asymmetric
supercapacitor
shows
high
energy
0.48
mW
h
2.42
superior
cyclic
stability
79.2%
retention
over
7000
cycles
10
cm-2.
great
promotion
performance
synergistically
attributed
to
intrinsic
theoretical
capacitances
compounds,
abundance
polyvalent
states,
improved
conductivity,
increases
reaction
sites
rate
electrode.
This
work
provides
new
route
designing
highly
efficient
developing
supercapacitors
with
practical
applications.
