ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 6, 2024
High-voltage
LiNixCoyMn(1–x–y)O2
(NCM)
is
one
of
the
most
promising
cathode
materials
for
high-energy-density
lithium
metal
batteries.
Significant
efforts
have
been
made
on
inhibiting
surface
transition
NCM
from
ordered
layered
phase
to
low-ionic-conductivity
rock
salt
phase,
which
facilitates
maintaining
a
low
interfacial
impedance
superior
cycle
performance.
However,
it
often
overlooked
that
also
has
electronic
conductivity,
may
alleviate
notorious
growth
dendrite-induced
short-circuit.
In
this
article,
we
further
demonstrate
effective
in
resisting
pulverization
contact
with
Li
via
situ
transmission
electron
microscopy.
The
experiences
rapid
overlithiation
Li,
triggers
lattice
expansion
and
pulverization.
overlithiation-induced
degradation
retarded
Li-deficient
disorder
surface,
attributed
blocked
Li+
primary
path.
Our
work
revisits
unwanted
layer
cathodes,
provides
guideline
interface
design
long-cycling
high-safety
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
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 6, 2024
High-voltage
LiNixCoyMn(1–x–y)O2
(NCM)
is
one
of
the
most
promising
cathode
materials
for
high-energy-density
lithium
metal
batteries.
Significant
efforts
have
been
made
on
inhibiting
surface
transition
NCM
from
ordered
layered
phase
to
low-ionic-conductivity
rock
salt
phase,
which
facilitates
maintaining
a
low
interfacial
impedance
superior
cycle
performance.
However,
it
often
overlooked
that
also
has
electronic
conductivity,
may
alleviate
notorious
growth
dendrite-induced
short-circuit.
In
this
article,
we
further
demonstrate
effective
in
resisting
pulverization
contact
with
Li
via
situ
transmission
electron
microscopy.
The
experiences
rapid
overlithiation
Li,
triggers
lattice
expansion
and
pulverization.
overlithiation-induced
degradation
retarded
Li-deficient
disorder
surface,
attributed
blocked
Li+
primary
path.
Our
work
revisits
unwanted
layer
cathodes,
provides
guideline
interface
design
long-cycling
high-safety
