Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 21, 2025
Abstract
Constructing
heterostructure
for
synergistic
effect
plays
an
indispensable
role
in
enhancing
the
energy
density
and
cycling
stability
of
layered
oxide
sodium‐ion
batteries.
However,
mechanisms
formation
effects
remain
inadequately
understood.
In
this
study,
strategy
controlling
oxygen
vacancies
is
carried
out
based
on
Na
2
Mn
3
O
7
cathode
material.
The
vacancy
can
change
coordination
environment
+
occupancy
between
MnO
layers,
which
a
significant
driving
force
structure
transitions.
Furthermore,
ratio
lattice
to
(L
/V
)
demonstrates
distinct
nonlinear
relationship
with
structural
proportion
materials,
be
used
as
critical
descriptor
evaluating
proportion.
obtained
(,
55
wt.%),
P2‐Na
0.67
(P6
/mmc,
40
wt.%)
O′3‐NaMnO
(C/2
m,
5
retains
anionic
redox
characteristics,
exhibits
high
specific
capacity
245
mAh
g
−1
596
Wh
kg
.
heterogeneous
interfaces
provides
numerous
insertion/extraction
sites
presence
minor
amount
effectively
mitigates
Jahn‐Teller
at
low
voltages,
stability.
This
work
offers
new
insights
into
rational
design
application
cathodes.
Energy & Environmental Science,
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 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.
Abstract
Lithium‐ion
batteries
(LIBs)
have
dominated
the
market
for
a
long
time.
However,
scarcity
of
lithium
resources
has
sparked
concerns
about
future
energy
storage
devices,
leading
many
researchers
to
turn
their
attention
other
such
as
sodium‐ion
(SIBs),
potassium‐ion
(KIBs),
zinc‐ion
(ZIBs),
and
so
on.
Among
them,
SIBs
attracted
widespread
from
due
abundant
sodium
resources,
high
safety,
excellent
low‐temperature
performance.
Because
cathode
battery
determines
density,
cycle
life,
charge/discharge
rate,
cost,
research
on
cathodes
is
particularly
important.
Layered
oxide
cathodes,
with
periodic
layered
structure,
good
electrical
conductivity,
two‐dimensional
ion
transport
channels,
are
regarded
most
promising
materials
SIBs.
Currently,
main
issues
facing
include
irreversible
phase
transitions,
air
sensitivity,
insufficient
surface
residual
alkali,
migration
dissolution
transition
metals.
The
key
solving
these
problems
lies
in
development
new
generation
high‐performance
cathodes.
Hence,
we
review
current
progress
various
optimizing
strategies,
finally
summarize
provide
an
outlook
trends
image
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.
O3-type
layered
oxides
are
considered
as
one
of
the
most
promising
cathode
materials
for
sodium-ion
batteries
(SIBs)
owing
to
their
high
initial
sodium
content,
reversible
capacity,
mature
synthesis
process,
and
low
production
cost.
However,
adverse
phase
transition
highly
air-sensitive
issues
result
in
unsatisfactory
cycle
life
poor
processing
properties,
limiting
further
commercialization.
Herein,
we
prepare
a
high-entropy
metal
oxide
modified
by
TiB2
coating
layer,
which
displays
increasing
structural
stability
due
increase
entropy.
The
layer
prevents
direct
contact
between
electrolyte
electrode,
suppresses
unfavorable
side
reaction
with
electrolyte.
Moreover,
induces
part
boron
ions
(B2−)
doping
into
oxygen
CNMT,
expanding
ion
diffusion
channels.
Consequently,
designed
Na0.9Cu0.12Ni0.33Mn0.4Ti0.15O2@TiB2
(CNMT@TB)
1
wt%
exhibits
significantly
improvement
cycling
(capacity
retention
91.58%
after
200
cycles
at
100
mA
g−1
93.90%
250
500
g−1)
compared
pristine
CNMT
(63.88%
80.07%
g−1).
This
work
provides
insightful
guidance
simultaneously
enhancing
electrochemical
performance
batteries.
