Interdisciplinary materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 9, 2024
Abstract
Exploiting
high‐capacity
cathode
materials
with
superior
reliability
is
vital
to
advancing
the
commercialization
of
sodium‐ion
batteries
(SIBs).
Layered
oxides,
known
for
their
eco‐friendliness,
adaptability,
commercial
viability,
and
significant
recent
advancements,
are
prominent
materials.
However,
electrochemical
cycling
over
an
extended
period
can
trigger
capacity
fade,
voltage
hysteresis,
structural
instability,
adverse
interface
reactions
which
shorten
battery
life
cause
safety
issues.
Thus,
it
essential
require
in‐depth
understanding
degradation
mechanisms
layered
oxides.
In
this
review,
crystal
electronic
structures
oxides
revisited
first,
a
renewed
also
presented.
Three
critical
highlighted
deeply
discussed
namely
Jahn–Teller
effect,
phase
transition,
surface
decomposition,
directly
responsible
inferior
performances.
Furthermore,
comprehensive
overview
recently
reported
modification
strategies
related
proposed.
Additionally,
review
discusses
challenges
in
practical
application,
primarily
from
mechanism
standpoint.
Finally,
outlines
future
research
directions,
offering
perspectives
further
develop
SIBs,
driving
industrialization
SIBs.
Small,
Journal Year:
2024,
Volume and Issue:
20(27)
Published: Feb. 15, 2024
Abstract
P2‐phase
layered
cathodes
play
a
pivotal
role
in
sodium‐ion
batteries
due
to
their
efficient
Na
+
intercalation
chemistry.
However,
limited
by
crystal
disintegration
and
interfacial
instability,
bulk
failure
plague
electrochemical
performance.
To
address
these
challenges,
structural
enhancement
combined
with
surface
modification
is
achieved
through
trace
Y
doping.
Based
on
synergistic
combination
of
experimental
results
density
functional
theory
(DFT)
calculations,
the
introduction
partial
ions
at
site
(2d)
acts
as
stabilizing
pillar,
mitigating
electrostatic
repulsions
between
adjacent
TMO
2
slabs
thereby
relieving
internal
stress.
Furthermore,
presence
effectively
optimizes
Ni
3d‐O
2p
hybridization,
resulting
enhanced
electronic
conductivity
notable
rapid
charging
ability,
capacity
77.3
mA
h
g
−1
40
C.
Concurrently,
also
induces
formation
perovskite
nano‐islands,
which
serve
minimize
side
reactions
modulate
diffusion.
As
result,
refined
P2‐Na
0.65
0.025
[Ni
0.33
Mn
0.67
]O
cathode
material
exhibits
an
exceptionally
low
volume
variation
(≈1.99%),
impressive
retention
83.3%
even
−40
°C
after1500
cycles
1
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(20), P. 12945 - 12956
Published: May 8, 2024
P3-layered
transition
oxide
cathodes
have
garnered
considerable
attention
owing
to
their
high
initial
capacity,
rapid
Na+
kinetics,
and
less
energy
consumption
during
the
synthesis
process.
Despite
these
merits,
practical
application
is
hindered
by
substantial
capacity
degradation
resulting
from
unfavorable
structural
transformations,
Mn
dissolution
migration.
In
this
study,
we
systematically
investigated
failure
mechanisms
of
P3
cathodes,
encompassing
dissolution,
migration,
irreversible
P3–O3′
phase
transition,
culminating
in
severe
collapse.
To
address
challenges,
proposed
an
interfacial
spinel
local
interlocking
strategy
utilizing
P3/spinel
intergrowth
as
a
proof-of-concept
material.
As
result,
demonstrated
enhanced
cycling
performance.
The
effectiveness
suppressing
migration
maintaining
structure
was
validated
through
depth-etching
X-ray
photoelectron
spectroscopy,
absorption
situ
synchrotron-based
diffraction.
This
engineering
presents
promising
avenue
for
development
advanced
cathode
materials
sodium-ion
batteries.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(41)
Published: Sept. 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.
Interdisciplinary materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 9, 2024
Abstract
Exploiting
high‐capacity
cathode
materials
with
superior
reliability
is
vital
to
advancing
the
commercialization
of
sodium‐ion
batteries
(SIBs).
Layered
oxides,
known
for
their
eco‐friendliness,
adaptability,
commercial
viability,
and
significant
recent
advancements,
are
prominent
materials.
However,
electrochemical
cycling
over
an
extended
period
can
trigger
capacity
fade,
voltage
hysteresis,
structural
instability,
adverse
interface
reactions
which
shorten
battery
life
cause
safety
issues.
Thus,
it
essential
require
in‐depth
understanding
degradation
mechanisms
layered
oxides.
In
this
review,
crystal
electronic
structures
oxides
revisited
first,
a
renewed
also
presented.
Three
critical
highlighted
deeply
discussed
namely
Jahn–Teller
effect,
phase
transition,
surface
decomposition,
directly
responsible
inferior
performances.
Furthermore,
comprehensive
overview
recently
reported
modification
strategies
related
proposed.
Additionally,
review
discusses
challenges
in
practical
application,
primarily
from
mechanism
standpoint.
Finally,
outlines
future
research
directions,
offering
perspectives
further
develop
SIBs,
driving
industrialization
SIBs.
