Energy Materials,
Journal Year:
2024,
Volume and Issue:
4(5)
Published: May 31, 2024
In
order
to
satisfy
the
rapidly
increasing
demands
for
a
large
variety
of
applications,
there
has
been
strong
desire
low-cost
and
high-energy
lithium-ion
batteries
thus
next-generation
cathode
materials
having
low
cost
yet
high
capacity.
this
regard,
research
cobalt
(Co)-free
nickel
(Ni)-rich
(CFNR)
layered
oxide
materials,
able
meet
high-capacity
requirements,
extensively
pursued
but
remains
challenging
largely
due
elimination
Co
content
Ni
in
these
materials.
Herein,
we
systematically
review
challenges
recent
advances
CFNR
on
important
aspects.
Specifically,
first
clarify
role
Ni-rich
oxides
possibility
its
fabricate
We
then
discuss
methods
developed
synthesize
This
is
followed
by
elucidation
about
their
degradation
mechanisms
progress
modification
strategies
achieved
enhancing
properties
Finally,
current
future
prospects
as
batteries.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: March 6, 2024
Abstract
Constraining
the
electrochemical
reactivity
of
free
solvent
molecules
is
pivotal
for
developing
high-voltage
lithium
metal
batteries,
especially
ether
solvents
with
high
Li
compatibility
but
low
oxidation
stability
(
<4.0
V
vs
+
/Li).
The
typical
concentration
electrolyte
approach
relies
on
nearly
saturated
coordination
to
molecules,
which
confronted
severe
side
reactions
under
voltages
>4.4
V)
and
extensive
exothermic
between
reactive
anions.
Herein,
we
propose
a
molecular
anchoring
restrict
interfacial
in
diluted
electrolytes.
hydrogen-bonding
interactions
from
effectively
suppress
excessive
enhances
nickel
rich
cathodes
at
4.7
V,
despite
extremely
/ether
molar
ratio
(1:9)
absence
anion-derived
interphase.
Furthermore,
processes
thermal
abuse
conditions
are
mitigated
due
reduced
anions,
postpones
battery
runaway.
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
14(8)
Published: Jan. 26, 2024
Abstract
Gas
evolution
from
high‐nickel
layered
oxide
cathodes
(>90%
Ni)
remains
a
major
issue
for
their
practical
application.
Gaseous
species,
such
as
CO
2
,
O
and
CO,
that
are
evolved
at
high
states
of
charge
(SOC)
worsen
the
overall
safety
batteries,
pressure
build‐up
within
cell
may
lead
to
rupture.
Since
these
gasses
produced
during
cathode
degradation,
tracking
formation
is
also
important
in
diagnosing
failure.
Online
electrochemical
mass
spectrometry
(OEMS)
powerful
situ
technique
study
gas
high‐voltage
charge.
However,
differences
OEMS
experimental
setups
between
different
groups
make
it
challenging
compare
results
groups.
In
this
perspective,
various
factors
influence
based
on
collected
group
presented.
The
focus
conditions
release,
with
particular
emphasis
reactive
oxygen
subsequent
chemical
reactions
electrolyte.
Promising
strategies,
electrolytes,
compositional
tuning,
surface
coatings
effective
suppressing
highlighted.
Critical
insights
into
mitigating
degradation
provided
guide
development
safer,
high‐energy
batteries.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
36(14)
Published: Dec. 25, 2023
Lithium-metal
batteries
(LMB)
employing
cobalt-free
layered-oxide
cathodes
are
a
sustainable
path
forward
to
achieving
high
energy
densities,
but
these
exhibit
substantial
transition-metal
dissolution
during
high-voltage
cycling.
While
crossover
is
recognized
disrupt
solid-electrolyte
interphase
(SEI)
formation
on
graphite
anodes,
experimental
evidence
necessary
demonstrate
this
for
lithium-metal
anodes.
In
work,
advanced
high-resolution
3D
chemical
analysis
conducted
with
time-of-flight
secondary-ion
mass
spectrometry
(TOF-SIMS)
establish
spatial
correlations
between
the
transition
metals
and
electrolyte
decomposition
products
found
cycled
Insights
into
localization
of
various
chemistries
linked
crucial
processes
that
define
LMB
performance,
such
as
lithium
deposition,
SEI
growth,
deposition
deduced
from
precise
elemental
SEI.
Heterogenous
perpetuate
both
heterogeneous
growth
These
confirmed
across
anodes
different
electrolytes.
An
stable
higher
voltages
shown
minimize
its
effects
Overall,
results
highlight
importance
maintaining
uniform
coverage
which
disrupted
by
operation
at
voltages.
ACS Nano,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 9, 2025
Nickel-rich
NCM
cathode
materials
promise
lithium-ion
batteries
with
a
high
energy
density.
However,
an
increased
Ni
fraction
in
the
leads
to
complex
phase
transformations
electrode-electrolyte
side
reactions,
which
cause
rapid
capacity
fading.
Here,
we
show
that
initial
formation
cycle
at
0.1
C
higher
cutoff
voltage
(≥4.35
V)
increases
stability
of
Ni-rich
(LiNi
Advanced Science,
Journal Year:
2023,
Volume and Issue:
10(26)
Published: July 2, 2023
Real-time
onboard
state
monitoring
and
estimation
of
a
battery
over
its
lifetime
is
indispensable
for
the
safe
durable
operation
battery-powered
devices.
In
this
study,
methodology
to
predict
entire
constant-current
cycling
curve
with
limited
input
information
that
can
be
collected
in
short
period
time
developed.
A
total
10
066
charge
curves
LiNiO2
-based
batteries
at
constant
C-rate
are
collected.
With
combination
feature
extraction
step
multiple
linear
regression
step,
method
accurately
an
error
<
2%
using
only
10%
as
information.
The
further
validated
across
other
chemistries
(LiCoO2
-based)
open-access
datasets.
prediction
LiCoO2
around
5%
information,
indicating
generalization
developed
predicting
curves.
paves
way
fast
health
status
during
practical
applications.
