Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 20, 2024
Abstract
Li‐rich
Mn‐based
cathode
materials
exhibit
a
remarkable
reversible
specific
capacity
exceeding
250
mAh
g
−1
,
positioning
them
as
the
preferred
choice
for
next
generation
of
high‐energy
density
lithium‐ion
battery
materials.
However,
their
inferior
rate
and
cycling
performance
pose
significant
challenges.
In
this
context,
material
incorporating
an
expanded
fast
Li‐ion
diffusion
network
has
been
successfully
synthesized.
This
advancement
involves
introduction
single‐layer
LiCo(Ni)O
2
with
high
coefficients
into
crystal
structure
cathode,
thereby
enhancing
performance,
achieving
impressive
212
at
5
C.
Furthermore,
can
effectively
isolates
Li
MnO
3
phase
domains,
structural
stability
during
anion
redox
process,
consequently
extending
electrochemical
limits.
Operating
within
voltage
range
2.1–4.6
V,
retention
reaches
80%
after
400
cycles,
decay
merely
0.74
mV
per
cycle.
innovative
utilization
provides
invaluable
insights
that
will
guide
development
strategies
aimed
unlocking
capability
in
layered
oxide
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 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.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 2, 2025
Abstract
The
structural
instability
of
lithium‐based
transition
metal
layered
oxides
during
electrochemical
cycling‐exacerbated
by
phenomena
such
as
dissolution
and
phase
transitions‐induces
rapid
capacity
degradation,
thus
constraining
their
applicability
in
high‐energy‐density
lithium
batteries.
While
coating
these
materials
can
bolster
stability,
the
employment
electrochemically
inactive
coatings
may
inadvertently
undermine
energy
storage
performance,
presenting
a
significant
trade‐off.
In
response
to
this
challenge,
an
innovative
core‐shell
cathode
architecture
is
presented,
wherein
high
entropy
doped
LiNi
1/6
Mn
Al
Ti
Mo
Ta
O
2
serves
shell
nickel‐rich
cobalt‐free
0.89
0.11
constitutes
core,
synthesized
through
simple
two‐step
co‐precipitation
methodology
(designated
LHECNM).
This
high‐entropy
preserves
core's
performance
while
effectively
mitigating
transformations
ion
dissolution,
thereby
enhancing
robustness.
Moreover,
configuration
significantly
diminishes
barrier
for
Li
+
diffusion,
facilitating
superior
transport
dynamics.
Consequently,
LHECNM
demonstrates
remarkable
achieving
discharge
201.57
mAh
g
−1
,
commendable
rate
capability
up
5C,
impressive
92%
retention
over
prolonged
cycling.
investigation
elucidates
promising
paradigm
design
materials,
offering
profound
insights
advancement
future
technologies.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 21, 2025
Abstract
Li‐rich
Mn‐based
(LRM)
cathode
materials
are
considered
promising
candidates
for
next‐generation
lithium‐ion
batteries
due
to
their
high
specific
capacity
and
cost‐effectiveness.
However,
they
exhibit
deficiencies
in
volumetric
energy
density,
largely
attributable
lower
compaction
which
constrains
application
space‐limited
devices
such
as
electric
vehicles
portable
devices.
In
this
study,
(NH
4
)
2
S
O
8
surface
treatment
is
proposed
enhance
the
density
stability
performance
of
LRM
materials.
This
induces
formation
Li/O
vacancies
spinel
structure,
leading
an
increase
initial
Coulombic
efficiency
(ICE)
from
75.62%
89.07%,
well
discharge
214.2
266.01
mAh
g
−1
compared
with
untreated
sample.
Furthermore,
self‐grading
generated
by
crushing
particles
during
process,
results
enhancement
3.18
cm
−3
3145
Wh
L
,
significantly
surpassing
2487
commercial
The
present
work
provides
new
perspectives
development
density.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 28, 2024
Single-crystalline
Ni-rich
layered
oxides
are
one
of
the
most
promising
cathode
materials
for
lithium-ion
batteries
due
to
their
superior
structural
stability.
However,
sluggish
diffusion
kinetics
and
interfacial
issues
hinder
practical
applications.
These
intensify
with
increasing
Ni
content
in
ultrahigh-Ni
regime
(≥90%),
significantly
threatening
viability
single-crystalline
strategy
oxide
cathodes.
Herein,
by
developing
a
high-entropy
coating
strategy,
we
successfully
constructed
an
epitaxial
lattice-coherent
rock-salt
layer
(∼3
nm)
via
Zr
Al
doping
on
surface
LiNi
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 14, 2025
Abstract
High‐voltage
(≥4.5
V)
Ni‐rich
cathodes
can
help
advance
the
development
of
next
generation
high‐energy
lithium‐ion
batteries.
However,
high
voltage
used
in
deteriorates
cycling
performance
due
to
structural
disintegration
polycrystalline
particles
and
electrolyte
decomposition.
Herein,
a
robust
protective
layer
with
high‐voltage
tolerance
is
applied
surface
address
these
challenges.
The
consists
crosslinked
bio‐based
elastomer
(CBE)
whose
main
chain
connected
by
saturated
bonds,
which
confers
tolerance.
CBE
an
elastic
material
viscoelastic
properties,
allowing
it
serve
as
energy
dissipation
that
mitigates
strain
accumulation
preserves
integrity
coated
cathode.
also
shows
polarity
rapid
transport
capabilities
presence
oxygen‐containing
components,
ensures
tight
wrapping
improves
their
interfacial
reaction
kinetics.
As
anticipated,
4.5
V
Li||LiNi
0.6
Co
0.2
Mn
O
2
batteries
exhibit
initial
capacity
176.7
mA
h
g
−1
retention
rate
79.5%
after
400
cycles.
This
study
underscores
critical
role
customized
stabilizing
at
voltages.
