Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 8, 2025
Abstract
Conversion‐type
metal
fluorides
(MFs)
cathodes
are
promising
candidates
for
high‐energy
lithium–ion
batteries.
However,
their
cycling
performance
is
limited
due
to
the
decomposition
of
organic
solvent
electrolytes
at
cathode/electrolyte
interface
and
dissolution
active
materials
during
cycling,
especially
elevated
temperatures
(above
60
°C).
To
address
these
challenges,
a
thermally
stable,
solvent‐free
electrolyte
(OSFE)
composed
three
low
melting
alkali
perfluorinated
sulfonimide
salts
developed,
which
helps
minimize
undesirable
decomposition.
Additionally,
chemical
vapor
deposition
technology
employed
apply
conformal
carbon
coating
representative
MF,
NiF
2
,
effectively
preventing
materials.
The
synergistic
effect
OSFE
enables
previously
uncyclable
cathode,
exhibits
high
reversible
discharge
capacity
450
mAh
g
−1
after
160
cycles
80
°C.
Moreover,
by
incorporating
10
wt.%
Li
GeP
S
12
(LGPS)
into
OSFE,
cycle
number
extended
300
cycles,
maintaining
an
impressive
350
These
advancements
highlight
potential
successful
operation
MFs
using
paving
way
practical
applications
future
commercialization.
Abstract
Silicon
is
widely
recognized
as
a
promising
anode
material
for
all‐solid‐state
batteries
(ASSBs)
due
to
exceptional
specific
capacity,
abundant
availability,
and
environmental
sustainability.
However,
the
considerable
volume
expansion
particle
fragmentation
of
Si
during
cycling
lead
significant
performance
degradation,
limiting
its
practical
application.
Herein,
development
pre‐lithiated
Si‐based
composite
(c‐Li
1
Si)
presented,
designed
address
key
challenges
faced
by
anodes,
namely
severe
changes
low
electrochemical
stability.
The
c‐Li
anodes
are
prepared
incorporating
Li₁Si
powders
with
Li
6
PS
5
Cl
(LPSCl)
sulfide
solid
electrolyte
(SSE),
forming
dense
structure
that
enhances
conductivity
mitigates
structural
degradation.
ASSBs
Si‐60
exhibit
outstanding
performance,
including
excellent
rate
capability
capacity
retention
84.4%
after
1000
cycles
at
C
even
anode‐to‐cathode
ratios
(N/P
ratio)
1.68.
EIS
pressure
measurements
reveal
improved
reaction
kinetics
reduced
expansion.
X‐ray
micro‐CT
SEM
further
confirmed
introduction
LPSCl
effectively
alleviated
maintained
electrode
integrity,
contributing
enhanced
performance.
These
results
underscore
potential
overcome
intrinsic
limitations
offering
pathway
toward
high‐energy‐density
ASSBs.
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 19, 2025
Abstract
Sulfide‐based
all‐solid‐state
batteries
(ASSBs)
are
widely
recognized
as
one
of
the
most
promising
next‐generation
energy
storage
technologies.
High‐mass‐loaded
composite
cathode
is
crucial
for
electrochemical
performance
ASSBs.
However,
safety
characteristics
practical
cathodes
have
not
been
reported.
Herein,
thermal
runaway
mechanisms
under
different
pressures
systematically
revealed
by
employing
pellet
pressing
LiNi
0.8
Co
0.1
Mn
O
2
(NCM811)
and
Li
6
PS
5
Cl
(LPSC).
Completely
from
conventional
perceptions
powder,
compaction
density
increases,
an
inert
P
S
x
protective
layer
generated
in
situ
via
intensified
redox
reactions
at
interface,
which
inhibited
exothermic
between
oxygen
released
NCM811
LPSC.
This
work
sheds
light
on
sulfide‐based
ASSBs,
can
effectively
build
a
bridge
academic
industrial
research
design
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 1, 2025
Abstract
Research
into
the
development
and
understanding
of
solid‐state
batteries
often
relies
on
pelletized
press
cells
due
to
their
comparative
ease
use.
However,
these
model
are
prone
comparability
reproducibility
issues.
This
study
examines
extent
which
cathode
composite
preparation
influences
cell
performance
a
reference
system
comprising
LiNi
0.82
Mn
0.07
Co
0.11
O
2
as
active
material,
Li
6
PS
5
Cl
solid
electrolyte,
carbon
nanofibers
conductive
additive,
an
indium–lithium
foil
anode.
The
is
prepared
either
via
hand
mortaring
or
in
mini
vibrating
mill.
mixing
process
found
be
critical
for
accounts
many
discrepancies
observed
capacities
different
made
with
identical
materials
following
same
assembly
protocol.
open‐circuit
relaxation
method
implemented
quantify
mass
utilization
situ,
depends
correlates
performance.
approach
allows
quantitative
differentiation
between
static
kinetic
capacity
losses
during
discussion
specific
values.
results
demonstrate
significance
necessity
quantifying
quality
reliable
electrochemical
data
acquisition
interpretation.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 13, 2024
Abstract
The
solid
electrolyte
(SE)
membrane
plays
a
crucial
role
in
sulfide‐based
all‐solid‐state
batteries
(ASSBs).
However,
the
challenge
of
finding
appropriate
polymer
binders
with
excellent
(electro‐)chemical
compatibility
and
adhesive
properties,
remains
significant
obstacle
for
wet
slurry
processing
sulfide
SE
membranes.
Herein,
novel
“polar‐nonpolar
synergistic”
finely‐tuned
strategy
is
employed
to
design
an
ethylene‐methyl
acrylate
(EMA)
copolymer
binder
facilitate
wet‐slurry‐based
fabrication
Significantly,
by
adjusting
ratio
polar
nonpolar
groups,
this
methodology
enables
dissolve
effectively
toluene‐based
also
ensures
good
adhesion
between
EMA
particles.
prepared
exhibits
ultra‐thin
thickness
(36
µm),
flexibility,
ionic
conductivity
(1.43
mS
cm
−1
).
ASSB
assembled
shows
capacity
retention
rate
92.9%
after
120
cycles
at
0.5
C.
This
work
on
effect
provides
insight
manufacturing
high‐quality
