Lithium-ion
batteries
(LIB)
are
extensively
utilized
across
industries
for
their
rechargeable
nature,
but
capacity
degradation
during
charge/discharge
cycling
poses
the
risk
of
battery
failure.
The
LiNi0.8Co0.1Mn0.1O2
(NCM811)
cathode
material
encounters
challenges
in
maintaining
high
and
performance
due
to
cation
mixing,
ion
migration,
electrolyte
chemical
reactions.
While
conventional
inorganic
coating
layer
offers
some
physical
protection,
it
is
susceptible
detachment.
We
introduce
organic
poly(acrylic
acid)
(PAA)
adhesive
polyvinylidene
fluoride
(PVDF)
cross-linked
form
a
composite
adhesive.
combination
PAA
PVDF
improves
viscosity
enhances
bonding
strength
material.
C=O
group
forms
coordination
bonds
with
transition
metals,
creating
coordinated
anchoring
effect
that
stability
structure.
reversible
exchange
between
H+
−COOH
Li+
promotes
lithium-ion
transport
at
electrode
interface,
enhancing
electrochemical
performance.
After
200
cycles,
retention
under
1C
conditions
reached
90.20%.
Chemical Science,
Journal Year:
2024,
Volume and Issue:
15(35), P. 14415 - 14424
Published: Jan. 1, 2024
High
voltage/high
temperature
operation
aggravates
the
risk
of
capacity
attenuation
and
thermal
runaway
layered
oxide
cathodes
due
to
crystal
degradation
interfacial
instability.
A
combined
strategy
bulk
regulation
surface
chemistry
design
is
crucial
handle
these
issues.
Here,
we
present
a
simultaneous
Li2WO4-coated
gradient
W-doped
0.98LiNi0.5Mn0.5O2·0.02Li2WO4
cathode
through
modulating
content
exotic
dopant
stoichiometric
lithium
salt
during
lithiation
calcination.
Benefiting
from
slightly
Li-enriched
induced
by
hetero-epitaxially
grown
Li2WO4
surface,
demonstrates
superior
electrochemical
performance
LiNi0.49Mn0.49W0.02O2
WO3
coated
0.98LiNi0.5Mn0.5O2·0.02WO3
without
phase.
Specifically,
when
cycled
in
potential
range
2.7-4.5
V
at
30
°C,
possesses
high
discharge
199.2
156.5
mA
h
g-1
0.1
5C
retention
92.88%
after
300
cycles
1C.
Even
cut-off
voltage
4.6
V,
it
still
retains
91.15%
200
1C
°C.
Compared
with
LiNi0.5Mn0.5O2,
enhanced
can
be
attributed
its
robust
stable
interface,
inhibited
lattice
oxygen
release,
improved
Li+
transport
kinetics.
Our
work
emphasizes
significance
modulation
stabilizing
hence
unlocks
vast
possibilities
for
future
design.
Energy Advances,
Journal Year:
2024,
Volume and Issue:
3(8), P. 1869 - 1893
Published: Jan. 1, 2024
Doping,
coating,
surface
modification,
formation
of
composites
and
control
crystalline
orientation
can
the
capacity
retention
Ni-rich
cathodes.
Furthermore,
design
Co-free
cathodes
may
provide
a
cost-effective
solution.
International Journal of Minerals Metallurgy and Materials,
Journal Year:
2024,
Volume and Issue:
31(11), P. 2345 - 2367
Published: Oct. 9, 2024
Abstract
Undoubtedly,
the
enormous
progress
observed
in
recent
years
Ni-rich
layered
cathode
materials
has
been
crucial
terms
of
pushing
boundaries
Li-ion
battery
(LIB)
technology.
The
achieved
improvements
energy
density,
cyclability,
charging
speed,
reduced
costs,
as
well
safety
and
stability,
already
contribute
to
wider
adoption
LIBs,
which
extends
nowadays
beyond
mobile
electronics,
power
tools,
electric
vehicles,
new
range
applications,
including
grid
storage
solutions.
With
numerous
published
papers
broad
reviews
available
on
subject
oxides,
this
review
focuses
more
most
ideas
presented
literature
references.
covered
topics
include
doping
composition
optimization,
advanced
coating,
concentration
gradient
single
crystal
materials,
innovations
concerning
electrolytes
their
modification,
with
application
cathodes
solid-state
batteries
also
discussed.
Related
are
briefly
mentioned,
high-entropy
approach
zero-strain
concept
well.
A
critical
overview
still
unresolved
issues
is
given,
perspectives
further
directions
studies
expected
gains
provided.
