Gradient design for Si-based microspheres as ultra-stable Li-storage anode
Energy storage materials,
Год журнала:
2024,
Номер
unknown, С. 103939 - 103939
Опубликована: Дек. 1, 2024
Язык: Английский
Enabling uniform lithiation in solid-state synthesis by preventing pre-matured surface grain coarsening through grain boundary engineering
Chemical Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
This
work
reported
a
novel
method
to
enhance
the
solid-state
calcination
homogeneity
of
LiNi
0.9
Co
0.05
Mn
O
2
by
depositing
WO
3
layer
on
precursor
surface
via
atomic
deposition,
obtaining
high-performance
nickel-rich
layered
cathode.
Язык: Английский
Layered‐to‐Layered Synthesis of High‐Performance Nickel‐Rich Layered Cathodes via Low‐Temperature Oxidation of Layered Hydroxide Precursor
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 2, 2025
Abstract
Nickel‐rich
layered
transition
metal
oxide
cathodes,
such
as
LiNi
x
Co
y
Mn
z
O
2
(LiTMO
),
are
set
to
revolutionize
the
capabilities
of
lithium‐ion
batteries
with
their
exceptional
energy
density.
The
conventional
synthesis
method,
which
entails
high‐temperature
sintering
MO
6
‐structured
hydroxide
precursors,
leads
decomposition
framework
form
rock
salt.
Although
it
can
be
reconstituted
after
lithiation
a
structure,
structural
defects
typically
remain
in
final
product.
Hereby,
two‐step,
low‐temperature
oxidation,
and
process
is
introduced,
where
structure
remains,
thereby
producing
outstanding
cathode
materials.
Ni
0.9
0.05
(OH)
precursor
initially
oxidized
at
ambient
temperature
OOH,
followed
by
below
90
°C.
resulting
material
exhibits
an
impressive
discharge
capacity
over
239.3
mAh
g
−1
0.1C
within
2.7–4.3
V,
initial
coulombic
efficiency
(ICE)
95.76%.
A
subsequent
treatment
significantly
enhances
crystallinity,
further
improving
material's
capacity,
ICE,
rate
capability,
cycling
stability,
surpassing
those
traditionally
sintered
This
approach
applied
0.825
0.115
0.06
LiNiO
,
demonstrating
its
versatility
synthesizing
nickel‐rich
Additionally,
this
method
helps
optimize
LiTMO
performance
while
mitigating
irreversible
reactions.
Язык: Английский
Enhancing the electrochemical performance of Ni-rich cathode through an in-situ La-doping and La4NiLiO8-coating synergistic strategy
Chemical Engineering Journal,
Год журнала:
2024,
Номер
501, С. 157791 - 157791
Опубликована: Ноя. 19, 2024
Язык: Английский
Dynamic Reconstruction of the Surface Lattice to Stabilize Lithium Nickel Oxide Cathodes via Molybdenum Modification
ACS Energy Letters,
Год журнала:
2025,
Номер
unknown, С. 1072 - 1081
Опубликована: Фев. 5, 2025
Язык: Английский
Mechano-Chemo-Electrochemically Booming Nickel-Rich Layered Cathode Electrochemical Performance
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 4, 2025
The
practical
application
of
nickel-rich
layered
transition
metal
oxide
is
hampered
by
its
fast
capacity
decay,
deriving
from
the
side
reactions
with
electrolyte,
crack
formation
caused
volume
variation,
and
phase
change
near
surface
during
charging/discharging
processes.
Here,
we
experimentally
realize
mechano-chemo-electrochemical
coupling
effect
nanolayer
on
to
greatly
improve
electrochemical
performance.
According
detailed
atomic
structure
analysis,
this
facilitates
consuming
residual
lithium
left
oxide,
suppressing
reducing
due
variation
long-term
cycles.
This
design
plays
an
in
mechanical,
chemical,
aspects
simultaneously
which
beneficial
for
their
development.
Язык: Английский
Surface Defects Induced by Acid Etching for Promoting Ni-rich Cathode Regeneration
Energy storage materials,
Год журнала:
2025,
Номер
unknown, С. 104307 - 104307
Опубликована: Май 1, 2025
Язык: Английский
High quality large‐scale nickel‐rich layered oxides precursor co‐precipitation via domain adaptation‐based machine learning
InfoMat,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 8, 2025
Abstract
Nickel‐rich
layered
oxides
(LiNi
x
Co
y
Mn
z
O
2
,
NCM)
are
among
the
most
promising
cathode
materials
for
high‐energy
lithium‐ion
batteries,
offering
high
specific
capacity
and
output
voltage
at
a
relatively
low
cost.
However,
industrial‐scale
co‐precipitation
presents
significant
challenges,
particularly
in
maintaining
particle
sphericity,
ensuring
stable
concentration
gradient,
preserving
production
yield
when
transitioning
from
lab‐scale
compositions.
This
study
addresses
critical
issue
large‐scale
synthesis
of
nickel‐rich
NCM
(
=
0.8381):
nickel
leaching,
which
compromises
uniformity
battery
performance.
To
mitigate
this,
we
optimize
reaction
process
develop
an
artificial
intelligence‐driven
defect
prediction
system
that
enhances
precursor
stability.
Our
domain
adaptation
based
machine
learning
model,
accounts
equipment
wear
environmental
variations,
achieves
detection
accuracy
97.8%
on
data
conditions.
By
implementing
this
approach,
successfully
scale
up
to
over
tons,
achieving
83%
retention
after
500
cycles
1C
rate.
In
addition,
proposed
approach
demonstrates
formation
gradient
composition
sphericity
0.951
(±0.0796).
work
provides
new
insights
into
mass
precursors,
both
performance
reliability.
image
Язык: Английский
Phase Transition during Sintering of Layered Transition Metal Oxide Sodium Cathodes
Nano Letters,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 27, 2025
Layered
cathodes
derived
from
precursor
materials
have
garnered
significant
attention
in
sodium
ion
battery
(SIB)
research.
However,
the
structure
evolution
mechanisms
during
sintering
process
remain
inadequately
understood.
In
this
work,
two
precursors
with
irregular
and
regular
morphologies
were
subjected
to
identical
calcination
conditions
synthesize
O3-NaNi0.4Fe0.2Mn0.4O2
cathodes.
Comprehensive
analysis
revealed
that
underwent
heterogeneous
Na+
diffusion,
resulting
an
R3̅m
shell
encapsulating
a
substantial
rock-salt
phase
core
solid-state
sodiation
process.
This
leads
drastic
transition
generated
unfavorable
pores
subsequent
high-temperature
contrast,
quasi-spherical
maintains
uniform
accessibility
throughout
process,
which
facilitated
optimal
yielded
superior
electrochemical
performance.
investigation
elucidates
critical
relationship
between
morphology
dynamics,
providing
crucial
insights
into
rational
design
of
precursor-derived
layered
SIB
applications.
Язык: Английский
Revealing the Role of Ammonia in the Rapid Crystallization Kinetics for Ni-Rich Hydroxide Precursors via Microreactors
Industrial & Engineering Chemistry Research,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 12, 2024
The
morphology
and
microstructure
of
precursors
are
the
key
to
preparation
high-quality
NCM
cathodes
due
their
inheritance
relationship.
However,
a
large
amount
sulfate
exists
in
precursors,
detriment
electrochemical
performance
Ni-rich
cathode
materials.
Herein,
an
effective
method
for
reduction
was
proposed
synthesis
Ni0.90Co0.05Mn0.05(OH)2
precursor
by
adding
0.24
M
ammonia
microreactor.
less
Ni(OH)2
with
system
is
attributed
higher
formation
energy
adsorption
(ENi(OH)2-am-SO42–
=
7.483
eV
vs
ENi(OH)2-SO42–
3.451
eV).
results
demonstrated
that
can
promote
growth
primary
particles
(81.5
nm)
reduce
content
impurity
from
0.80
0.28%
precursors.
Moreover,
prepared
materials
exhibit
high
specific
capacity
190.4
mAh
g–1
at
1C
superior
Li+
diffusion
coefficients.
This
study
sheds
light
on
role
rapid
coprecipitation
provides
guidance
process
cathodes.
Язык: Английский