Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 25, 2025
Abstract
In
the
realm
of
energy
conversion
and
storage
devices,
transition
metal
porous
oxide
composites
have
been
subject
extensive
research
interest.
Supercapacitors
electrocatalysis,
as
two
important
modalities,
exhibit
a
competitive
yet
balanced
relationship,
much
like
state
equilibrium.
this
work,
comprehensive
reduction
approach
is
employed
during
pyrolysis
anionic/cationic
doped
molecular
clusters,
specifically
[Zn
7
L
6
(
μ
3
‐OCH
)
]·[CoCl
4
]
(where
=
2‐methoxy‐6‐((methylimino)‐methyl)phenolate,
abbreviated
Zn
Co
1
).
Notably,
within
an
inert
atmosphere,
significant
quantity
diverse
range
reducing
gases
are
generated
throughout
entire
temperature
spectrum
,
monitored
by
thermogravimetry‐mass
spectrometry
(TG‐MS).
It
observed
that
production
these
led
to
in
valence
oxides,
thereby
inducing
shift
electrochemical
behavior
from
oxygen
evolution
supercapacitive
performance
at
different
temperatures.
The
‐350
sample
demonstrated
reaction
(OER)
performance,
with
overpotential
168
mV
current
density
10
mA·cm
−2
.
Conversely,
‐700
exhibited
excellent
capacitance
attaining
1406
F·g
−1
A·g
findings
offer
novel
synthesis
clusters
electrical
capabilities
via
total
strategy.
Abstract
The
sluggish
reaction
kinetics
and
formidable
shuttle
effect
of
soluble
lithium
polysulfides
(LiPSs)
are
thorny
problems
for
the
future
industrialization
lithium–sulfur
(Li–S)
batteries.
Therefore,
exploring
efficient
electrocatalysts
to
capture
LiPSs
accelerate
their
conversion
is
highly
desirable
yet
tremendously
challenging.
Herein,
a
high‐efficiency
Bi/Bi
2
O
3
/VMoN@rGO
electrocatalyst
with
multifunctional
active
sites
multilevel
heterointerfaces
elaborately
designed
Li–S
Noteworthy,
can
greatly
modulate
electron
distribution,
facilitate
charge
transfer,
optimize
chemical
absorption,
enhance
intrinsic
activity,
while
rGO
contributes
high
electrical
conductivity,
sufficient
sites,
robust
structural
stability.
Thanks
synergy
different
components,
batteries
employing
functional
separators
exhibit
impressive
electrochemical
performance
sulfur
utilization
even
under
loading.
More
importantly,
it
discovered
that
Bi
experience
an
phase
evolution
generate
S
amorphous
crystalline
phases,
thereby
bringing
in
unexpected
enhancement.
Furthermore,
experimental
results
theoretical
calculations
authenticate
reduced
Li
decomposition
energy
barrier
achieved
after
situ
reconstruction.
This
work
not
only
provides
new
mechanistic
insights
into
developing
but
also
sheds
light
on
regulating
catalytic
activity
via
self‐reconstruction.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 24, 2024
Abstract
The
uncontrolled
polysulfide
shuttling
and
lithium
dendrite
growth
greatly
impede
the
practical
implementation
of
Li–S
batteries.
These
issues
can
be
alleviated
by
constructing
an
artificial
layer
that
immobilizes
soluble
polysulfides
regulates
Li
+
flux.
Here,
a
layer‐expanded
montmorillonite
is
fabricated
through
molecular
intercalation
to
serve
as
dual
regulator
for
lithiophilic
montmorillonite,
with
its
ordered
expanded
diffusion
channels,
exhibits
high
transference
number,
promotes
homogeneous
deposition.
Additionally,
moderate
adsorption
polysulfides,
combined
favorable
behavior,
enhanced
redox
kinetics
sulfur
species.
This
unique
structure
enables
prolonged
lifespan
1000
cycles
at
0.5C
low
capacity
decay
0.04%
per
cycle
Materials and Corrosion,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 16, 2025
ABSTRACT
The
microstructure
and
electrochemical
corrosion
performance
of
vacuum
cladding
FeNiCoCrMoBSi
HEA
coatings
were
investigated.
results
show
that
the
coating
forms
an
FCC+σ
eutectic
structure.
FCC
matrix
phase
has
abalone
crystal
diffraction
angle
plane
(111)
is
positively
correlated
with
remelting
temperature,
while
its
peak
intensity
grain
size
are
inversely
correlated.
Unlike
obtained
at
temperatures
1150°C
1230°C,
where
σ
a
Mo
poor
phase,
temperature
1190°C
Mo‐rich
phase.
lowest
self‐corrosion
current
density
(3.31
μA/cm
2
),
highest
potential
(−0.3797
V),
polarization
impedance
(69
616
Ω),
modulus
(23
205.68
W
cm
).
Its
2.89
times
2.04
higher
than
those
remelted
respectively,
demonstrating
excellent
resistance.
This
can
be
attributed
to
comprehensive
effect
various
factors,
such
as
dual
phases,
dense
structure,
passivation
film.
