Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 24, 2024
Abstract
The
uncontrolled
polysulfide
shuttling
and
lithium
dendrite
growth
greatly
impede
the
practical
implementation
of
Li–S
batteries.
These
issues
can
be
alleviated
by
constructing
an
artificial
layer
that
immobilizes
soluble
polysulfides
regulates
Li
+
flux.
Here,
a
layer‐expanded
montmorillonite
is
fabricated
through
molecular
intercalation
to
serve
as
dual
regulator
for
lithiophilic
montmorillonite,
with
its
ordered
expanded
diffusion
channels,
exhibits
high
transference
number,
promotes
homogeneous
deposition.
Additionally,
moderate
adsorption
polysulfides,
combined
favorable
behavior,
enhanced
redox
kinetics
sulfur
species.
This
unique
structure
enables
prolonged
lifespan
1000
cycles
at
0.5C
low
capacity
decay
0.04%
per
cycle
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(52)
Опубликована: Авг. 23, 2024
Abstract
The
weak
bonding
of
A
atoms
with
MX
layers
in
MAX
phases
not
only
enables
the
selective
etching
for
MXene
preparation
but
brings
about
chance
to
construct
derivatives/MXene
composites
via
situ
conversion.
Here,
a
facile
and
general
gas‐solid
reaction
systems
are
elegantly
devised
multi‐dimensional
based
including
AlF
3
nanorods/MXene,
nanocrystals/MXene,
amorphous
/MXene,
filled
carbon
nanotubes/MXene,
layered
metal
chalcogenides/MXene,
MOF/MXene,
so
on.
intrinsic
effect
mechanism
interlayer
confinement
towards
crystal
growth,
catalytic
behavior,
van
der
Waals‐heterostructure
construction
coordination
rationally
put
forward.
tight
interface
combination
synergistic
from
distinct
components
make
them
promising
active
materials
electrochemical
applications.
More
particularly,
nanorods/Nb
2
C
demonstrate
bi‐directional
activity
toward
conversion
between
Li
S
lithium
polysulfides,
which
alleviates
shuttle
lithium‐sulfur
batteries.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 24, 2024
Abstract
The
uncontrolled
polysulfide
shuttling
and
lithium
dendrite
growth
greatly
impede
the
practical
implementation
of
Li–S
batteries.
These
issues
can
be
alleviated
by
constructing
an
artificial
layer
that
immobilizes
soluble
polysulfides
regulates
Li
+
flux.
Here,
a
layer‐expanded
montmorillonite
is
fabricated
through
molecular
intercalation
to
serve
as
dual
regulator
for
lithiophilic
montmorillonite,
with
its
ordered
expanded
diffusion
channels,
exhibits
high
transference
number,
promotes
homogeneous
deposition.
Additionally,
moderate
adsorption
polysulfides,
combined
favorable
behavior,
enhanced
redox
kinetics
sulfur
species.
This
unique
structure
enables
prolonged
lifespan
1000
cycles
at
0.5C
low
capacity
decay
0.04%
per
cycle
