EcoEnergy,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 20, 2025
Abstract
Ni‐rich
cathodes
are
more
promising
candidates
to
the
increasing
demand
for
high
capacity
and
ability
operate
at
voltages.
However,
Ni
content
creates
a
trade‐off
between
energy
density
cycling
stability,
mainly
caused
by
chemo‐mechanical
degradation.
Oxygen
evolution,
cation
mixing,
rock
salt
formation,
phase
transition,
crack
formation
contribute
degradation
process.
To
overcome
this
problem,
strategies
such
as
doping,
surface
coating,
core‐shell
structures
have
been
employed.
The
advantage
of
doping
is
engineer
cathode
surface,
structure,
particle
morphology
simultaneously.
This
review
aims
summarize
recent
advances
in
understanding
mechanism
role
different
dopants
enhancing
thermal
stability
overall
electrochemical
performance.
pinning
pillaring
effects
on
suppressing
oxygen
transition
introduced.
It
found
that
higher
ionic
radii
enable
reside
particles,
preserving
refining
suppress
formation.
Finally,
effect
Li
ion
diffusion,
rate
capability,
long‐term
discussed.
eScience,
Journal Year:
2024,
Volume and Issue:
unknown, P. 100276 - 100276
Published: May 1, 2024
Microstructure
engineering
serves
as
a
potent
approach
to
counteract
the
mechanical
deterioration
of
Ni-rich
layered
cathodes,
stemming
from
anisotropic
strain
during
Li+
(de)intercalation.
However,
pressing
challenge
persists
in
devising
direct
method
for
fabricating
radially
aligned
cathodes
utilizing
oriented
hydroxide
precursors.
In
this
study,
we
synthesized
LiNi0.92Co0.04Mn0.04O2
oxides
boasting
superior
aligned,
size-refined
primary
particles
through
combination
strategic
precipitation
regulation
and
lithiation
tuning.
Elongated
particles,
achieved
by
stepwise
control
ammonia
concentration
pH
particle
growth,
facilitate
formation
precursor
particles.
Leveraging
our
prepared
cathode
exhibits
high
discharge
capacity
229
mAh
g−1
at
0.05
C,
alongside
excellent
cycle
stability,
retaining
93.3%
after
200
cycles
0.5
C
(30
°C)
half
cell,
86.4%
1000
1
full
cell.
Revisiting
oxide
underscores
significance
controlling
maximize
size
perpendicular
[001]
attain
suitable
along
high-temperature
calcination,
offering
valuable
insights
synthesizing
high-performance
cathodes.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(12)
Published: Jan. 31, 2024
Fast
charging
technology
for
electric
vehicles
(EVs),
offering
rapid
times
similar
to
conventional
vehicle
refueling,
holds
promise
but
faces
obstacles
owing
kinetic
issues
within
lithium-ion
batteries
(LIBs).
Specifically,
the
significance
of
cathode
materials
in
fast
has
grown
because
Ni-rich
cathodes
are
employed
enhance
energy
density
LIBs.
Herein,
mechanism
behind
loss
capability
during
extended
cycling
is
investigated
through
a
comparative
analysis
with
different
microstructures.
The
results
revealed
that
microcracks
and
resultant
deterioration
significantly
compromised
over
cycling.
When
thick
rocksalt
impurity
phases
form
throughout
particles
electrolyte
infiltration
via
microcracks,
limited
kinetics
Li
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 13, 2025
Abstract
Li‐ion
and
Na‐ion
batteries
are
promising
systems
for
powering
electric
vehicles
grid
storage.
Layered
3d
transition
metal
oxides
A
x
TMO
2
(A
=
Li,
Na;
TM
metals;
0
<
≤
2)
have
drawn
extensive
attention
as
cathode
materials
due
to
their
exceptional
energy
densities.
However,
they
suffer
from
several
technical
challenges
caused
by
crystal
structure
degradation
associated
with
ions
migration,
such
poor
cycling
stability,
inferior
rate
capability,
significant
voltage
hysteresis,
serious
decay.
Aiming
tackle
these
challenges,
this
review
provides
an
in‐depth
discussion
comprehensive
understanding
of
the
migration
behaviors
in
.
First,
key
thermodynamics
kinetics
that
impact
discussed,
covering
ionic
radius,
electronic
configuration,
arrangement,
barrier.
In
particular,
details
provided
regarding
universal
specific
characteristics
Ni,
Co,
Mn,
Fe,
Cr,
V
layered
materials.
Subsequently,
impacts
migrations
on
electrochemical
performance
emphasized
terms
fundamental
science
behind
issues,
strategies
modulate
advanced
development
summarized.
Besides,
characterization
techniques
probing
present,
like
neutron
diffraction
(ND),
scanning
transmission
electron
microscopy
(STEM),
nuclear
magnetic
resonance
(NMR),
others.
Finally,
future
directions
regard
comprehensively
concluded.
This
offers
valuable
insights
into
basic
design
oxide
batteries.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
36(1)
Published: Nov. 13, 2023
Abstract
Raising
the
charging
cut‐off
voltage
of
layered
oxide
cathodes
can
improve
their
energy
density.
However,
it
inevitably
introduces
instabilities
regarding
both
bulk
structure
and
surface/interface.
Herein,
exploiting
unique
characteristics
high‐valence
Nb
5+
element,
a
synchronous
surface‐to‐bulk‐modified
LiCoO
2
featuring
Li
3
NbO
4
surface
coating
layer,
Nb‐doped
bulk,
desired
concentration
gradient
architecture
through
one‐step
calcination
is
achieved.
Such
multifunctional
facilitates
construction
high‐quality
cathode/electrolyte
interface,
enhances
+
diffusion,
restrains
lattice‐O
loss,
Co
migration,
associated
layer‐to‐spinel
phase
distortion.
Therefore,
stable
operation
Nb‐modified
half‐cell
achieved
at
4.6
V
(90.9%
capacity
retention
after
200
cycles).
Long‐life
250
Wh
kg
−1
4.7
V‐class
550
pouch
cells
assembled
with
graphite
thin
anodes
are
harvested
(both
beyond
87%
1600
This
modification
strategy
establishes
technological
paradigm
to
pave
way
for
high‐energy
density
long‐life
lithium‐ion
cathode
materials.
Nano Letters,
Journal Year:
2024,
Volume and Issue:
24(32), P. 9793 - 9800
Published: Aug. 1, 2024
O3-type
layered
oxides
have
been
extensively
studied
as
cathode
materials
for
sodium-ion
batteries
due
to
their
high
reversible
capacity
and
initial
sodium
content,
but
they
suffer
from
complex
phase
transitions
an
unstable
structure
during
intercalation/deintercalation.
Herein,
we
synthesize
a
high-entropy
transition
metal
oxide,
NaNi0.3Cu0.05Fe0.1Mn0.3Mg0.05Ti0.2O2
(NCFMMT),
by
simultaneously
doping
Cu,
Mg,
Ti
into
its
layers,
which
greatly
increase
structural
entropy,
thereby
reducing
formation
energy
enhancing
stability.
The
NCFMMT
exhibits
significantly
improved
cycling
stability
(capacity
retention
of
81.4%
at
1C
after
250
cycles
86.8%
5C
500
cycles)
compared
pristine
NaNi0.3Fe0.4Mn0.3O2
(71%
100
1C),
well
remarkable
air
Finally,
the
NCFMMT//hard
carbon
full-cell
deliver
103
mAh
g–1
1C,
with
83.8
maintained
300
81.4%).
