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.
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:
2025,
Volume and Issue:
unknown
Published: March 16, 2025
Abstract
High
entropy
oxides
(HEOs)
have
gained
increasing
attention
as
lithium‐ion
battery
anodes,
owing
to
their
multi‐principal
synergistic
effect
and
structural
stability.
However,
the
conversion
type
HEOs
also
suffer
from
low
intrinsic
conductivity,
volume
expansion,
slow
kinetics
traditional
metal
oxide.
Herein,
a
(FeCoNiCrMn)
2
O
3
HEO
with
hollow
multishelled
structure
Al‐doping
(Al‐HEO‐HoMS)
is
successfully
prepared
by
thermal
diffusion‐assisted
template
method.
The
effectively
accommodates
changes
mitigates
strains,
resulting
in
excellent
electrochemical
Most
importantly,
inserted
Al
dopant
Al‐HEO‐HoMS
serves
pegging
points,
securely
fastening
other
metallic
elements
Al─O
bonds
maintain
stability
of
anodes
during
repeated
lithiation/delithiation.
Additionally,
abundant
oxygen
vacancies
optimized
electronic
brought
doping
been
validated
accelerate
lithiation
kinetics.
Consequently,
anode
exhibits
high
reversible
capacity
1540
mAh
g
−1
after
500
cycles
at
1
A
.
combination
inert
regulation
expected
alleviate
expansion
problem,
offering
universal
strategy
for
designing
advanced
batteries.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 28, 2025
Abstract
Three‐dimensional
(3D)
carbon
materials
are
often
used
as
carriers
for
anchoring
iodine
in
zinc‐iodine
batteries
(ZIBs).
However,
the
physical
stacking
of
during
electrode
assembly
process,
weaker
interactions
between
non‐polar
and
species,
scarcity
catalytic
sites
conversion
led
to
a
reduced
activity
redox
reaction,
which
fails
completely
inhibit
shuttling
species.
Here,
3D
ultrafine
Cu‐anchored
CNT‐rGO
(3D
Cu@CNT‐rGO)
with
interconnected
structures
prepared
using
simple
laser‐induced
reduction
strategy.
The
microporous
structure
excellent
electrical
conductivity
Cu@CNT‐rGO
make
it
an
ideal
host
iodine.
Ultrafine
Cu
nanoparticles
introduce
catalysts
accelerate
kinetics,
efficiently
catalyze
iodine/polyiodide
conversion,
polyiodide
shuttling,
enhance
electrochemical
performance
ZIBs.
fabricated
zinc‐iodide
micro‐batteries
(ZIMBs)
delivers
high
specific
area
capacity
1.29
mAh
cm
−2
,
energy
density
(1.55
mWh
)
power
(33.58
mW
well
cyclin
stability
(80%
retention
after
4000
cycles).
Meanwhile,
ZIMBs
have
mechanical
flexibility
great
potential
application
field
integrated,
miniaturized
flexible
electronic
devices.
