Microstructures,
Journal Year:
2024,
Volume and Issue:
4(3)
Published: May 15, 2024
Sodium-ion
batteries
(SIBs)
have
attracted
enormous
attention
as
candidates
in
stationary
energy
storage
systems,
because
of
the
decent
electrochemical
performance
based
on
cheap
and
abundant
Na-ion
intercalation
chemistry.
Layered
oxides,
workhorses
modern
lithium-ion
batteries,
regained
interest
for
replicating
their
success
enabling
SIBs.
A
unique
feature
sodium
layered
oxides
is
ability
to
crystallize
into
a
thermodynamically
stable
P2-type
structure
with
under-stoichiometric
Na
content.
This
provides
highly
open
trigonal
prismatic
environments
ions,
permitting
high
Na+
mobility
excellent
structural
stability.
review
delves
intrinsic
characteristics
key
challenges
faced
by
cathodes
then
comprehensively
summarizes
up-to-date
advances
modification
strategies
from
compositional
design,
elemental
doping,
phase
mixing,
morphological
control,
surface
compensation.
The
updated
understanding
presented
this
anticipated
guide
expedite
development
oxide
practical
SIB
applications.
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(23), P. 13915 - 13924
Published: Jan. 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.
Small,
Journal Year:
2024,
Volume and Issue:
20(31)
Published: March 8, 2024
Abstract
Na
3
V
2
(PO
4
)
F
(NVPF)
is
emerging
as
a
promising
cathode
material
for
high‐voltage
sodium‐ion
batteries.
Whereas,
the
inferior
intrinsic
electrical
conductivity
leading
to
poor
rate
performance
and
cycling
stability.
To
address
this
issue,
strategy
of
synthesizing
unique
yolk‐shell
structured
NVPF
with
copper
substitution
via
spray
drying
method
proposed.
Besides,
synergistic
modulation
both
crystalline
structure
interfacial
properties
results
in
significantly
enhanced
NVPF.
The
optimized
materials
can
possess
high
capacity
117.4
mAh
g
−1
at
0.1
C,
remains
high‐capacity
retention
91.3%
after
5000
cycles.
A
detailed
investigation
kinetic
combined
situ
XRD
technology
DFT
calculations,
has
been
implemented,
particularly
regard
electron
conduction
sodium
ion
diffusion.
Consequently,
composition
1.94
Cu
0.06
nitrogen‐modified
carbon
coating
layer
shows
lowest
polarization
potential
because
effectively
electronic
+
diffusion
process
bulk
phase.
robust
electrochemical
suggests
that
developing
collaboration
interface
crystal
favorable
design
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(38)
Published: Aug. 1, 2024
Abstract
Layered
sodium‐ion
oxides
hold
considerable
promise
in
achieving
high‐performance
batteries.
However,
the
notorious
phase
transformation
during
charging,
attributed
to
increased
O
2−
─O
repulsion,
results
substantial
performance
decay.
Here,
a
hierarchical
layer
modification
strategy
is
proposed
stabilize
interlayer
repulsion.
During
desodiation,
migrated
Li
+
from
transition
metal
and
anchored
Ca
2+
sodium
sites
maintain
cationic
content
within
layer.
Meanwhile,
partial
oxygen
substitution
by
fluorine
involvement
of
redox
reactions
increase
average
valence
This
sustained
cation
presence
elevated
anion
collectively
mitigate
increasing
repulsion
extraction,
enabling
Na
0.61
0.05
[Li
0.1
Ni
0.23
Mn
0.67
]O
1.95
F
(NCLNMOF)
cathode
retain
pure
P2‐type
structure
across
wide
voltage
range.
Unexpected
insights
reveal
interplay
between
different
doping
elements:
robust
Li─F
bonds
steric
effects
suppressing
loss.
The
NCLNMOF
electrode
exhibits
82.5%
capacity
retention
after
1000
cycles
high‐rate
capability
94
mAh
g
−1
at
1600
mA
,
demonstrating
efficacy
for
layered
oxide
cathodes.
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.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2024,
Volume and Issue:
12(21), P. 8051 - 8060
Published: May 10, 2024
P2-type
layered
oxide
materials
have
attracted
considerable
interest
because
of
their
high
safety
and
low
cost.
However,
suffer
from
complicated
Na+/vacancy
ordering
undesirable
phase
transitions,
resulting
in
staircase-like
electrochemical
curves
accompanied
by
fast
capacity
fading
poor
rate
performance.
A
cathode
material
with
high-entropy
cation
configurations,
Na0.85Li0.08Mg0.04Ni0.22Al(B)0.04Mn0.62O2
(HEO),
is
designed
successfully
synthesized
this
work.
The
presence
various
metal
ions
the
transition
layers
imposes
an
influence
on
arrangement
alkali
layers,
as
evidenced
change
interlayer
distance
associated
electrostatic
repulsion.
HEO
exhibits
a
smooth
process
without
obvious
voltage
plateaus
within
2.0–4.3
V
delivers
reversible
115
mA
h
g–1.
Structural
characterizations
indicate
that
undergoes
complete
solid–solution
reaction
transitions
over
whole
range,
which
facilitates
ultrasmall
volume
variation
(0.6%)
Na+
ion
diffusion
(10–9
cm2
s–1)
process.
therefore
shows
excellent
performances
performance
(91
g–1
at
current
density
480
g–1)
retention
wide
temperature
range
−45
to
55
°C
(after
100
cycles,
batteries
show
80%
°C,
87%
room
temperature,
92%
°C).
results
described
work
demonstrate
method
inhibit
profiles
induced
either
or
P–O
useful
strategy
for
enhancing
all-climate
sodium-ion
batteries.
ACS Sustainable Chemistry & Engineering,
Journal Year:
2024,
Volume and Issue:
12(21), P. 8203 - 8213
Published: May 14, 2024
Introducing
electrochemically
active
or
inactive
metal
ion
substitution
is
a
well-known
modification
strategy
in
the
layered
transition-metal
oxide
cathode
materials
for
sodium
batteries.
However,
introduction
of
ions
into
layer
often
triggers
redox
reaction
anionic
oxygen.
The
charge
compensation
induced
by
oxygen
can
improve
specific
capacity
material,
whereas
it
also
brings
problems,
such
as
voltage
hysteresis
and
attenuation
sluggish
kinetics.
Here,
we
propose
high-entropy
using
Li,
Cu,
Ti,
find
that
synergistic
effect
these
elements
stimulate
prevent
adverse
effects
incorporation
Li+
increase
Na
content
reaction,
leading
to
increased
theoretical
disrupted
Na+/vacancy
ordering.
Cu2+
stabilize
environment
reduce
O
loss.
Ti4+
framework.
As
result,
reversible
optimized
P2-type
Na0.73Ni0.21Mn0.6Li0.06Cu0.06Ti0.07O2
was
128.12
mAh/g,
which
delivers
an
excellent
retention
79.21%
after
500
cycles
rate
performance
with
85.6
mAh/g
at
10
C.
At
same
time,
exhibits
smallest
highest
Na+
diffusion
coefficient.
By
stimulating
regulating
oxygen,
this
work
provides
new
insights
design
high-performance
practical
sodium-ion
