Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 22, 2025
Abstract
High‐voltage
oxygen
anionic
redox
provides
a
transformative
opportunity
to
achieve
high
energy
density
of
batteries.
However,
it
is
challenging
guarantee
the
reversibility
both
cationic
and
for
layered
transition
metal
(TM)
oxide
cathode
materials
due
oxygen‐redox
reactivity
complex
structural
rearrangements.
Herein,
honeycomb‐layered
Na
0.78
Ni
0.12
Li
0.18
Mn
0.7
O
2
(NNLMO)
material
with
NiMn
6
LiMn
dual‐topology
superlattice
proposed
sodium‐ion
The
theoretical
experimental
studies
demonstrate
that
2+
electronic
configuration
serves
as
buffer
tune
activity
by
enlarging
gap
between
p
3
d
orbitals,
while
topology
renders
delocalized
in
TM
layers
reinforce
superstructure
stability
through
suppressing
intralayer
migration
formation.
As
result,
NNLMO
delivers
highly
reversible
capacity
224
mAh
g
−1
mitigated
voltage
hysteresis
exhibits
remarkable
retention
92.2%
over
50
cycles
within
wide
range
1.5–4.5
V.
findings
suggest
new
insight
into
topological
design
high‐energy
sustainable
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 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 Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 27, 2025
Abstract
Prussian
blue
analogs
(PBAs)
are
promising
cathode
materials
for
sodium‐ion
batteries
(SIBs)
due
to
their
high
theoretical
capacity,
abundant
iron
resources,
and
simple
synthesis.
However,
practical
implementation
is
limited
by
[Fe(CN)₆]
vacancies
crystal
water,
which
compromise
structural
stability
hinder
the
redox
activity
of
low‐spin
(Fe
LS
).
Herein,
a
modulation
strategy
through
activating
Fe
site
introducing
Cu
2+
Zn
in
iron‐based
PBA
adopted.
Na₁.₅₅Cu₀.₀₅₃Zn₀.₀₆₀₈Fe₀.₈₉[Fe(CN)₆]₀.₉₄□₀.₀₆·1.80H₂O
(CZ‐FeFe),
successfully
synthesized
using
co‐precipitation.
The
initial
capacity
CZ‐FeFe
dramatically
enhanced
(from
0.48
0.80
e
−
),
verified
quasi‐in
situ
magnetic
characterization.
Theoretical
calculations
show
improved
electron
transport
ion
diffusion
CZ‐FeFe.
Simultaneously,
incorporation
also
beneficial
reducing
vacancies,
minimizing
slowing
phase
transition
between
monoclinic
cubic
structure,
leading
superior
long‐cycling
stability.
As
result,
exhibits
specific
144.7
mAh
g
−1
at
1
C,
exceptional
rate
performance,
remarkable
long‐term
(77.21%
retention
after
2500
cycles
10
C).
full‐cell
performance
further
confirms
activation
0.21
0.52
along
with
improvements
cycling
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 7, 2024
Abstract
Layered
transition
metal
oxide
(LTMO)
cathode
materials
of
sodium‐ion
batteries
(SIBs)
have
shown
great
potential
in
large‐scale
energy
storage
applications
owing
to
their
distinctive
periodic
layered
structure
and
2D
ion
diffusion
channels.
However,
several
challenges
hindered
widespread
application,
including
phase
complexities,
interface
instability,
susceptibility
air
exposure.
Fortunately,
an
impactful
solution
has
emerged
the
form
a
high‐entropy
doping
strategy
employed
research.
Through
implementation
doping,
LTMOs
can
overcome
aforementioned
limitations,
thereby
elevating
LTMO
highly
competitive
attractive
option
for
next‐generation
cathodes
SIBs.
Thus,
comprehensive
overview
origins,
definition,
characteristics
is
provided.
Additionally,
associated
with
SIBs
are
explored,
discussed
various
modification
methods
address
these
challenges.
This
review
places
significant
emphasis
on
conducting
thorough
analysis
research
advancements
about
utilized
Furthermore,
meticulous
assessment
future
development
trajectory
undertaken,
heralding
valuable
insights
design
synthesis
advanced
materials.
This
review
highlights
the
advancements
in
composite
structural
LTMOs
for
sodium-ion
batteries,
focusing
on
their
structure–function–performance
relationships
and
offering
insights
into
methodologies
to
develop
more
efficient
battery
materials.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 18, 2025
Abstract
Revealing
interlayer
oxygen
charge
is
of
great
significance
in
understanding
the
high‐voltage
and
air
stability
sodium
layered
cathodes,
but
it
currently
lacks
attention.
Particularly,
ion
full
batteries
under
high
cathode
loading
(≥8
mg
cm
−2
)
also
faces
extremely
challenges.
Here,
its
mechanism
for
are
revealed
a
high‐entropy
O3‐Na
0.85
Li
0.1
Al
0.02
Sn
0.08
Cu
Ti
Ni
0.3
Mn
O
2
(HEO)
cathode,
which
enables
robust
high‐cathode‐loading
sodium‐ion
batteries.
The
doping
effectively
maintains
transition
metal
(TM)─O
bond
covalency,
stabilizing
charge.
stable
O─O
repulsion
avoids
structural
collapse,
realizing
P3‐OP2‐P3
reversible
phase
transition.
Moreover,
reduced
achieves
Na
layer
contraction
Na─O
enhancement.
These
features
inhibit
attack
water
loss,
well
stability.
Therefore,
HEO
exhibits
good
up
to
900
cycles
2.0‒4.3
V
high‐capacity
retention
96.12%
after
5
day
exposure.
pouch
cell
with
≈16
≈60
mAh
lasts
100
cycles.
This
work
contributes
new
insights
into
both
cathodes
practical
