Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(15), P. 8927 - 8939
Published: Jan. 1, 2024
The
functionalized
separators
of
CoS
2
–MoS
/CNT
with
enriched-defects
and
enhanced-activity
are
used
to
accelerate
the
redox
kinetics
lithium
polysulfides
(LiPSs)
in
lithium–sulfur
(Li–S)
batteries.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
36(13)
Published: Dec. 22, 2023
Abstract
Sluggish
sulfur
redox
kinetics
and
Li‐dendrite
growth
are
the
main
bottlenecks
for
lithium–sulfur
(Li–S)
batteries.
Separator
modification
serves
as
a
dual‐purpose
approach
to
address
both
of
these
challenges.
In
this
study,
Co/MoN
composite
is
rationally
designed
applied
modifier
modulate
electrochemical
on
sides
cathode
lithium
anode.
Benefiting
from
its
adsorption‐catalysis
function,
decorated
separators
(Co/MoN@PP)
not
only
effectively
inhibit
polysulfides
(LiPSs)
shuttle
accelerate
their
conversion
but
also
boost
Li
+
flux,
realizing
uniform
plating/stripping.
The
accelerated
LiPSs
excellent
reversibility
triggered
by
modified
evidenced
performance,
in‐situ
Raman
detection
theoretical
calculations.
batteries
with
Co/MoN@PP
achieve
high
initial
discharge
capacity
1570
mAh
g
−1
at
0.2
C
low
decay
rate
0.39%,
transportation
1
mA
cm
−2
over
800
h.
Moreover,
areal
4.62
achieved
under
mass
loadings
4.92
mg
.
This
study
provides
feasible
strategy
rational
utilization
synergistic
effect
multifunctional
microdomains
solve
problems
anode
S
toward
long‐cycling
Li–S
Small,
Journal Year:
2024,
Volume and Issue:
20(32)
Published: March 19, 2024
Abstract
Lithium–sulfur
batteries
are
recognized
as
the
next
generation
of
high‐specific
energy
secondary
owing
to
their
satisfactory
theoretical
specific
capacity
and
density.
However,
commercial
application
is
greatly
limited
by
a
series
problems,
including
disordered
migration
behavior,
sluggish
redox
kinetics,
serious
shuttle
effect
lithium
polysulfides.
One
most
efficient
approaches
physically
limit
rational
design
hollow
framework
sulfur
host.
influence
structure
on
interlayers
has
not
been
clearly
reported.
In
this
study,
Mo
2
C/C
catalysts
with
hollow(H‐Mo
C/C)
solid(S‐Mo
frameworks
rationally
designed
explore
dependence
interlayer
or
contrast
physical
limitations
host,
inhibited
lithium‐ion
diffusion,
resulting
in
poor
electrochemical
properties
at
high
current
densities.
Based
superiority
various
frameworks,
H‐Mo
C/C@S
|
S‐Mo
C/C@PP
Li
cells
assembled
displayed
excellent
performance.
This
work
re‐examines
requirements
principles
catalyst
different
battery
units.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: April 30, 2024
Abstract
Lithium–sulfur
(Li–S)
battery
is
a
promising
next‐generation
energy
storage
system.
However,
the
poor
cyclability
caused
by
shuttle
effect
still
key
challenge
for
its
practical
application.
Here,
polypropylene
separator
modified
with
α‐MnO
2
/RuO
heterostructure
presented
to
facilitate
transformation
of
lithium
polysulfides
(LiPSs)
and
optimize
rate‐determining
step
in
both
reduction
oxidation
processes
sulfur
electrode.
The
unique
effectively
suppresses
dissolution
shuttling
soluble
LiPSs
Li–S
batteries.
Ru
content
≈8
wt%
enables
high
areal
capacity
over
5.0
mAh
cm
−2
after
55
cycles
at
0.2C
coin
cell,
resultant
pouch
cell
retains
78.2%
initial
200
0.1C,
suggesting
considerable
potential
commercial
applications.
This
work
provides
new
insights
into
regulation
electrochemical
reactions