Layered
transition
metal
oxides
are
widely
considered
as
ideal
cathode
materials
for
SIBs.
However,
the
existing
P2
and
O3
structures
possess
specific
issues,
which
limit
their
practical
applications.
To
address
these
this
work
designed
a
novel
intergrowth
layered
oxide
with
phases
by
implementing
Cu
Ti
into
structure
formation
of
high-entropy
superior
performance
The
electrochemical
test
results
show
that
optimized
P2/O3
possesses
high
initial
discharge
capacity
157.85
mAh
g
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.
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(23), С. 13915 - 13924
Опубликована: Янв. 1, 2024
The
electrochemical
properties
of
O3-NaNi
1/3
Fe
1/3−
x
Mn
Y
O
2
cathode
materials
for
sodium
ion
batteries
are
significantly
improved
by
using
yttrium
substitution
strategy
to
realize
the
micro-modulation
crystal
structure.
Advanced Materials,
Год журнала:
2024,
Номер
36(41)
Опубликована: Сен. 2, 2024
Abstract
As
a
typical
tunnel
oxide,
Na
0.44
MnO
2
features
excellent
electrochemical
performance
and
outstanding
structural
stability,
making
it
promising
cathode
for
sodium‐ion
batteries
(SIBs).
However,
suffers
from
undesirable
challenges
such
as
surface
residual
alkali,
multiple
voltage
plateaus,
low
initial
charge
specific
capacity.
Herein,
an
internal
external
synergistic
modulation
strategy
is
adopted
by
replacing
part
of
the
Mn
with
Ti
to
optimize
bulk
phase
construct
Ti‐containing
epitaxial
stabilization
layer,
resulting
in
reduced
+
transport
kinetics
improved
water/air
stability.
Specifically,
0.85
0.15
O
using
water‐soluble
carboxymethyl
cellulose
binder
can
realize
capacity
retention
rate
94.30%
after
1,000
cycles
at
2C,
stability
further
verified
kilogram
large‐up
applications.
In
addition,
taking
advantage
rich
content
Prussian
blue
analog
(PBA),
PBA‐Na
1‐x
x
composites
are
designed
compensate
insufficient
oxide
matched
hard
carbon
achieve
preparation
coin
full
cell
18650
cylindrical
battery
satisfactory
performance.
This
work
enables
application
oxides
SIBs
first
time
promotes
commercialization
SIBs.
The
development
of
cost-efficient,
long-lifespan,
and
all-climate
sodium-ion
batteries
is
great
importance
for
advancing
large-scale
energy
storage
but
plagued
by
the
lack
suitable
cathode
materials.
Here,
we
report
low-cost
Na-rich
Mn-based
Prussian
blue
analogues
with
superior
rate
capability
ultralong
cycling
stability
over
10,000
cycles
via
structural
optimization
electrochemically
inert
Ni
atoms.
Their
thermal
stability,
properties,
potential
in
full
cells
are
investigated
detail.
Multiple
situ
characterizations
reveal
that
outstanding
performances
benefit
from
their
highly
reversible
three-phase
transformations
trimetal
(Mn–Ni–Fe)
synergistic
effects.
In
addition,
a
high
sodium
diffusion
coefficient
low
volume
distortion
2.3%
observed
through
transmission
electron
microscopy
first-principles
calculations.
Our
results
provide
insights
into
engineering
advanced
applications.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(35), С. 46226 - 46236
Опубликована: Авг. 22, 2024
Preoxidation
is
an
effective
strategy
to
inhibit
the
graphitization
of
coals
during
carbonization.
However,
single
effect
traditional
preoxidation
could
barely
increase
surface-active
sites,
hindering
further
enhancement
sodium
storage.
Herein,
a
multieffect
was
proposed
suppress
structural
rearrangement
and
create
abundant
sites.
Mg(NO3)2·6H2O
helps
introduce
oxygen-containing
functional
groups
into
bituminous
coal
at
450
°C,
which
acted
as
cross-linking
agent
carbon
layers
promote
subsequent
thermal
carbonization
process.
Besides,
residue
solid
decomposition
product
MgO
would
react
with
The
obtained
coal-based
hard
contained
more
pseudographitic
domains
storage
active
optimized
sample
deliver
excellent
capacity
287.1
mAh
g–1
20
mA
g–1,
well
remarkable
cycling
stability
retention
96.1%
after
200
cycles
50
notable
88.9%
1000
300
g–1.
This
work
provides
practical
convert
low-cost
advanced
anodes
for
sodium-ion
batteries
(SIBs).
ACS Nano,
Год журнала:
2024,
Номер
18(29), С. 18834 - 18851
Опубликована: Июль 12, 2024
Given
the
pressing
depletion
of
lithium
resources,
sodium-ion
batteries
(SIBs)
stand
out
as
a
cost-effective
alternative
for
energy
storage
solutions
in
near
future.
Layered
transition
metal
oxides
(LTMOs)
emerge
leading
cathode
materials
SIBs
due
to
their
superior
specific
capacities
and
abundant
raw
materials.
Nonetheless,
achieving
long-term
stability
LTMOs
remains
challenge
inevitable
structural
degradation
during
charge–discharge
cycles.
The
complexity
diversity
cation
configurations/superstructures
within
layers
(TMO2)
further
complicate
understanding
newcomers.
Therefore,
it
is
critical
summarize
discuss
factors
available
strategies
enhancing
LTMOs'
stability.
In
this
review,
cationic
configurations
TMO2
are
introduced
from
crystallographic
perspective.
It
then
identifies
examines
four
key
responsible
decay,
alongside
impacts
various
modification
strategies.
Finally,
more
effective
practical
research
approaches
investigating
have
been
proposed.
work
aims
enhance
comprehension
deterioration
facilitate
substantial
improvement
cycle
life
density.
