Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 29, 2024
Abstract
Since
the
electrochemical
de/intercalation
behavior
is
first
detected
in
1980,
layered
oxides
have
become
most
promising
cathode
material
for
alkali
metal‐ion
batteries
(Li
+
/Na
/K
;
AMIBs)
owing
to
their
facile
synthesis
and
excellent
theoretical
capacities.
However,
inherent
drawbacks
of
unstable
structural
evolution
sluggish
diffusion
kinetics
deteriorate
performance,
limiting
further
large‐scale
applications.
To
solve
these
issues,
novel
strategy
high
entropy
has
been
widely
applied
oxide
cathodes
AMIBs
recent
years.
Through
multielement
synergy
stabilization
effects,
high‐entropy
(HELOs)
can
achieve
adjustable
activity
enhanced
stability.
Herein,
basic
concepts,
design
principles,
methods
HELO
are
introduced
systematically.
Notably,
it
explores
detail
improvements
on
limitations
oxides,
highlighting
latest
advances
materials
field
AMIBs.
In
addition,
introduces
advanced
characterization
calculations
HELOs
proposes
potential
future
research
directions
optimization
strategies,
providing
inspiration
researchers
develop
areas
energy
storage
conversion.
Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(25)
Published: April 22, 2024
Abstract
High‐entropy
oxides
(HEOs)
have
garnered
significant
attention
within
the
realm
of
rechargeable
batteries
owing
to
their
distinctive
advantages,
which
encompass
diverse
structural
attributes,
customizable
compositions,
entropy‐driven
stabilization
effects,
and
remarkable
superionic
conductivity.
Despite
brilliance
HEOs
in
energy
conversion
storage
applications,
there
is
still
lacking
a
comprehensive
review
for
both
entry‐level
experienced
researchers,
succinctly
encapsulates
present
status
challenges
inherent
HEOs,
spanning
features,
intrinsic
properties,
prevalent
synthetic
methodologies,
diversified
applications
batteries.
Within
this
review,
endeavor
distill
characteristics,
ionic
conductivity,
entropy
explore
practical
(lithium‐ion,
sodium‐ion,
lithium‐sulfur
batteries),
including
anode
cathode
materials,
electrolytes,
electrocatalysts.
The
seeks
furnish
an
overview
evolving
landscape
HEOs‐based
cell
component
shedding
light
on
progress
made
hurdles
encountered,
as
well
serving
guidance
compositions
design
optimization
strategy
enhance
reversible
stability,
electrical
electrochemical
performance
conversion.
Nano-Micro Letters,
Journal Year:
2024,
Volume and Issue:
17(1)
Published: Sept. 26, 2024
Abstract
The
synthesis
of
carbon
supporter/nanoscale
high-entropy
alloys
(HEAs)
electromagnetic
response
composites
by
carbothermal
shock
method
has
been
identified
as
an
advanced
strategy
for
the
collaborative
competition
engineering
conductive/dielectric
genes.
Electron
migration
modes
within
HEAs
manipulated
electronegativity,
valence
electron
configurations
and
molar
proportions
constituent
elements
determine
steady
state
efficiency
equivalent
dipoles.
Herein,
enlightened
skin-like
effect,
a
reformative
using
carbonized
cellulose
paper
(CCP)
supporter
is
used
to
preserve
oxygen-containing
functional
groups
(O·)
fibers
(CCF).
Nucleation
construction
emblematic
shell-core
CCF/HEAs
heterointerfaces
are
inextricably
linked
metabolism
induced
O·.
Meanwhile,
mode
switchable
electron-rich
sites
promotes
orientation
polarization
anisotropic
By
virtue
reinforcement
strategy,
CCP/HEAs
composite
prepared
35%
ratio
Mn
element
(CCP/HEAs-Mn
2.15
)
achieves
efficient
wave
(EMW)
absorption
−
51.35
dB
at
ultra-thin
thickness
1.03
mm.
mechanisms
resulting
dielectric
properties
HEAs-based
EMW
absorbing
materials
elucidated
combining
theoretical
calculations
with
experimental
characterizations,
which
provide
bases
feasible
strategies
simulation
practical
application
devices
(e.g.,
ultra-wideband
bandpass
filter).
Energy & Environmental Science,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 1, 2024
An
overview
of
high-entropy
strategies
for
batteries
is
provided,
emphasizing
their
unique
structural/compositional
attributes
and
positive
effects
on
stability
performance,
alongside
a
discussion
key
challenges
future
research
directions.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 23, 2024
Abstract
High‐entropy
oxides
(HEOs)
composed
of
multiple
metal
elements
have
attracted
great
attention
as
anode
materials
for
lithium‐ion
batteries
(LIBs)
due
to
the
synergistic
effects
various
species.
However,
practical
applications
HEOs
are
still
plagued
by
poor
conductivity,
unstable
solid
electrolyte
interphase
(SEI)
and
cycling
stability.
Herein,
nanosized
(FeCoNiCrMn)
3
O
4
HEO
(NHEO)
is
prepared
successfully
NaCl‐assisted
mechanical
ball‐milling
strategy.
Novelly,
polyacrylonitrile
(PAN)
used
binder
then
in
situ
thermochemically
cyclized
construct
a
PAN
(cPAN)
outer
layer
onto
NHEO
(NHEO‐cPAN).
The
formed
cPAN
coating
not
only
improves
electrical
but
also
reinforces
structural
interfacial
stability,
thereby,
resulted
NHEO‐cPAN
electrode
exhibits
significantly
enhanced
rate
cyclic
performance.
Specifically,
NHEO‐PAN500
delivers
high
reversible
capacity
560
mAh
g
−1
at
5
A
high‐capacity
retention
83%
over
800
cycles
.
Furthermore,
evolution
electrochemical
behavior
NHEO‐PAN
during
discharge/charge
systematically
investigated
operando
X‐ray
diffraction,
impedance
spectroscopy
ex
high‐resolution
transmission
electron
microscopy.
Therefore,
this
work
provides
new
insights
into
engineering
high‐performance
materials,
potentially
enlightening
HEO‐based
LIBs.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 26, 2025
Abstract
The
lattice‐strain
engineering
of
high‐entropy‐oxide
nanoparticles
(HEO‐NPs)
is
considered
an
effective
strategy
for
achieving
outstanding
performance
in
various
applications.
However,
independent
the
composition
variation
still
confronts
significant
challenges,
with
existing
modulation
techniques
difficult
to
achieve
mass
production.
Herein,
a
novel
continuous‐flow
synthesis
by
flame
spray
pyrolysis
(FSP)
proposed,
which
air
varying
flow
rates
introduced
fast
quenching
alter
cooling
rate
and
control
lattice
strain
HEO‐NPs.
Experimental
results
demonstrate
that
as
increases
from
0
L
24
min
−1
,
has
increased
more
than
ten
times,
tensile
HEO‐NPs
2.75%.
Utilizing
oxygen
evolution
reaction
(OER)
activity
indicator,
it
observed
overpotential
current
density
10
mA
cm
−2
reduced
25
mV.
Importantly,
this
approach
enables
simple
efficient
regulation
(110
mg
).
Thus,
study
provides
new
both
production
Gels,
Journal Year:
2025,
Volume and Issue:
11(2), P. 117 - 117
Published: Feb. 6, 2025
Tailoring
the
bandgap
of
a
material
is
necessary
for
improving
its
optical
properties.
Here,
high-entropy
oxide
Ce0.2Gd0.2Sm0.2Y0.2Zr0.2O2-δ
(HEO)
nanoparticles
was
modified
using
Pr3+.
Various
concentrations
Pr3+
(x
=
0,
0.01,
0.02,
0.05,
0.075,
0.1,
0.15)
were
incorporated
into
host
gel
combustion
synthesis.
After
step,
powders
heat-treated
at
various
temperatures
(650
°C,
800
950
°C)
2
h.
The
obtained
Pr3+-incorporated
HEO
characterized
X-ray
diffraction
(XRD),
field
emission
scanning
electron
microscopy
(FESEM),
and
UV–visible
spectroscopy.
results
indicate
that,
when
samples
are
calcined
single-phase
cubic
fluorite
structure
without
any
phase
separation
or
impurity.
absorbance
red-shifts
to
higher
wavelengths
concentration
increased.
This
reduces
from
3.15
eV
1.87
x
0
(HEO-0)
0.15
(HEO-6),
respectively.
HEOs
can
be
suitable
candidates
photocatalytic
applications
due
their
in
visible
region.
