Advanced Energy Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 5, 2024
Abstract
To
advance
the
sustainable
development
of
Li‐ion
batteries,
reducing
Co
content
in
Li[Ni
x
y
(Mn
or
Al)
(1–
–
)
]O
2
has
become
essential,
prompting
exploration
Co‐free
Mn
alternatives.
Among
promising
solutions
are
layered
cathodes
with
compositional
concentration
gradients,
which
offer
significant
potential.
However,
their
unique
microstructure
and
partitioning,
key
to
performance,
highly
sensitive
synthesis
temperatures.
Over‐sintering
can
lead
structural
unpredictability
cathode
materials
detrimental
effects
on
electrochemical
properties.
In
this
study,
a
stable
oxide
is
developed
by
doping
gradient
0.9
0.1
,
high‐valence
ions.
This
innovative
strategy
significantly
reduces
sensitivity
calcination
temperatures,
minimizing
nano‐
microstructural
changes
across
broad
temperature
range
(750–810
°C).
The
particle‐level
gradation
grain‐level
heteroelement
encapsulation
contribute
material's
exceptional
performance.
Mo
doping,
trace
amounts,
plays
pivotal
role
maintaining
stability
cathodes,
enabling
high‐potential
(4.3
V
vs
graphite)
suitable
for
practical
battery
applications.
Advanced Energy Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июнь 29, 2024
Abstract
Cathode
materials
are
the
core
components
of
lithium‐ion
batteries
owing
to
determination
practical
voltage
and
effective
energy
battery
system.
However,
advanced
cathodes
have
faced
challenges
related
cation
migration
intermixing.
In
this
review,
study
summarizes
structural
failure
mechanisms
due
mixing
cathodes,
including
Ni‐rich
Li‐rich
layered
spinel,
olivine,
disordered
rock‐salt
materials.
This
review
starts
by
discussing
degradation
caused
intermixing
in
different
focusing
on
electronic
structure,
crystal
electrode
structure.
Furthermore,
optimization
strategies
for
inhibition
rational
utilization
systematically
encapsulated.
Last
but
not
least,
remaining
proposed
perspectives
highlighted
future
development
cathodes.
The
accurate
analysis
using
characterization,
precise
control
material
synthesis,
multi‐dimensional
synergistic
modification
will
be
key
research
areas
provides
a
comprehensive
understanding
emerge
as
pivotal
controllable
factors
further
Chemical Society Reviews,
Год журнала:
2024,
Номер
53(23), С. 11462 - 11518
Опубликована: Янв. 1, 2024
The
nano-rod
structure
is
a
promising
approach
for
developing
high
performance
cathode
materials.
This
review
discusses
cathodes'
origin,
physicochemical,
and
electrochemical
properties
their
application
in
next-generation
batteries.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июнь 10, 2024
Abstract
The
development
of
lithium–metal
batteries
(LMBs)
has
emerged
as
a
mainstream
approach
for
achieving
high‐energy‐density
energy
storage
devices.
stability
electrochemical
interfaces
plays
an
essential
role
in
realizing
stable
and
long‐life
LMBs.
Despite
extensive
comprehensive
research
on
the
lithium
anode
interface,
there
is
limited
focus
cathode
particularly
regarding
high‐voltage
transition
metal
oxide
materials.
In
this
review,
challenges
associated
with
developing
materials
are
first
discussed.
Characterization
techniques
understanding
composition
structure
cathode–electrolyte
interphase
(CEI)
then
introduced.
Subsequently,
recent
developments
electrolyte
design
interface
modification
constructing
CEI
summarized.
Finally,
perspectives
future
trends
This
review
can
offer
valuable
guidance
designing
CEI,
pushing
forward
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 6, 2024
Abstract
Fast‐charging
lithium‐ion
batteries
are
pivotal
in
overcoming
the
limitations
of
energy
storage
devices,
particularly
their
density.
There
is
a
burgeoning
interest
boosting
performance
through
enhanced
fast‐charging
capabilities.
However,
challenge
lies
developing
that
combine
high
rates,
long
cycle
life,
capacity,
and
safety.
This
review
emphasizes
importance
fundamentals
design
principles
fast
charging,
identifying
transport
ion/electron
within
electrodes/electrolytes'
bulk
phase
at
boundaries
as
crucial
rate‐limiting
steps
for
charging.
Such
ion
tunnel
regulation,
interfacial
modification,
defect
engineering
multiphase
systems,
various
optimization
strategies
improve
stable
exceptional
electrochemical
reaction
kinetics
electrodes.
Constructing
solid
electrolyte
interfaces
adjusting
solvation
structures
further
enhance
Li
+
diffusion
electrolytes.
The
critically
assesses
impacts
these
strategies,
suggesting
future
research
directions
insights
advancing
batteries.
It
anticipated
this
will
inspire
guide
systematic
evolution
technologies.
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 27, 2025
Abstract
Co‐free
high‐Ni
layered
cathode
materials
LiNi
x
Me
y
O
2
(Me
=
Mn,
Mg,
Al,
etc.)
are
a
key
part
of
the
next‐generation
high‐energy
lithium‐ion
batteries
(LIBs)
due
to
their
high
specific
capacity
and
low
cost.
However,
hindered
Li
+
kinetics
reactivity
Ni
4+
result
in
poor
rate
performance
unsatisfied
cycling
stability.
This
work
designs
promising
strategy
for
designing
high‐performance
high‐entropy
doping
0.9
Mn
0.03
Mg
0.02
Ta
Mo
Na
0.01
(HE‐Ni90‐1.557)
by
elemental
screening
compositional
fine‐tuning.
Compositional
fine‐tuning
optimizes
synergistic
relationship
between
dopant
elements,
thereby
significantly
suppresses
kinetic
hysteresis
induced
/Ni
2+
mixing.
The
pillar
effect
enhances
diffusion
at
state
charge
(SOC).
Meanwhile,
postpones
H2‐H3
phase
transition
reduces
dissolution
metals
loss
lattice
oxygen
cathodes.
Consequently,
atomic
electrode
particle
scales
enhanced.
HE‐Ni90‐1.557
exhibits
an
initial
225.1
mAh
g
−1
0.2
C
full
cell
with
retention
83.1%
after
1500
cycles
3C.
provides
avenue
commercializing
cathodes
LIBs.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 13, 2025
Abstract
The
Co‐free
Li[Ni
0.75
Mn
0.25
]O
2
(NM7525)
cathode
offers
the
significant
advantage
of
low
production
costs.
However,
it
requires
a
high‐voltage
charging
process
(≥4.5
V
vs
Li/Li⁺)
to
achieve
energy
density
level
high‐Ni
x
Co
y
z
(
≥
0.8)
cathodes,
which
leads
severe
structural
and
morphological
degradation
in
secondary
particles
during
prolonged
cycling.
Herein,
is
demonstrated
that
formation
stable
homogeneous
cathode‐electrolyte
interface
(CEI)
can
effectively
suppress
large
porosity
crack
propagation
NM7525
cathode,
as
well
undesirable
changes
microstrain
crystal
structure,
with
high
cut‐off
voltage
4.45
an
elevated
temperature
45
°C
full‐cell
system.
For
stabilization
CEI
layer
at
operation,
optimized
electrolyte
system
applied,
containing
additive
highest
occupied
molecular
orbital
(HOMO)
energy.
This
controlled
enhances
electrochemical
performances
NM7525‐based
full
cell.
In
case
cyclability,
CEI‐stabilized
delivers
high‐capacity
retention
90%
after
100
cycles
under
harsh
operation
conditions
temperature,
whereas
as‐prepared
shows
just
78%.
