A
functional
separator
is
developed
by
in-situ
grafting
nickel
tetraaminophthalocyanine
(NiTAPc)
onto
the
surface
of
polypropylene
(PP).
It
applied
to
inhibit
shuttle
effect
polysulfides
(PSs)
in
lithium-sulfur(Li-S)
batteries.
The
characterization
results
showed
that
NiTAPc
highly
dispersed
and
uniformly
grafted
PP
separator.
In-situ
strategy
effectively
mitigates
self-agglomeration
issue
associated
with
enhances
exposure
catalytically
active
Ni-N
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 15, 2024
Abstract
The
step‐order
or
disproportionation
conversion
of
lithium
polysulfides
(LiPSs)
is
still
a
blind
box
in
LiS
batteries
(LSBs)
system.
cation‐doped
electrocatalyst
(Fe‐CoS
2
@HCNF)
designed
through
modulating
electron‐surrounding
situation
the
central
atomic
d‐band
to
promote
regional
electron‐directed
LiPSs
reduced‐order‐transformation
(especially,
Li
S
4
S).
Fe‐CoS
@HCNF
satisfies
requirement
mass
(electron/ion)
transfer
reaction,
quantizing
as
multi‐osmosis‐connected
transportation
channels
and
an
all‐encompassing
interior
space
for
sulfur
reduction
occurring.
Based
on
experiments
DFT
calculations,
introduced
Fe
presents
local
electron
deficiency
state
toward
regulating
delocalization
between
Co
matrix,
which
induces
metal
site,
strengthening
3d
orbital
coupling
interaction
with
2−
LiPSs,
further
guiding
order‐transformation
intermediate
LiPSs.
Consequently,
electrode
has
excellent
electrochemical
properties,
performing
at
3.0
C
0.064
%
capacity
decay
per
cycle,
even
maintaining
super
cycle
stability
high
loadings.
In
addition,
pouch
cell
assembled
can
also
reach
initial
specific
1070.3
mAh
g
−1
0.1
C,
show
good
long‐term
stability.
This
work
provides
valuable
prospect
analyzing
SRR
by
flow
regulation
practical
LSBs.
Materials,
Год журнала:
2025,
Номер
18(5), С. 1141 - 1141
Опубликована: Март 4, 2025
In
this
paper,
the
natural
waste
pinecone
as
a
carbon
precursor
for
generation
of
satisfactory
sulfur
host
materials
in
lithium-sulfur
batteries
was
realized
by
introducing
molybdenum
carbide
nanoparticles
into
derived
structure.
The
conductive
pinecone-derived
doped
with
N,
O
reveals
an
expansive
specific
surface
area,
facilitating
accommodation
higher
load.
Moreover,
integration
Mo2C
also
significantly
enhances
its
chemical
affinity
and
catalytic
capacity
polysulfides
(LiPSs)
to
alleviate
shuttle
effect
accelerate
redox
conversion.
As
result,
WPC-Mo2C/S
electrode
displays
excellent
electrochemical
performance,
including
low
decay
rate
0.074%
per
cycle
during
600
cycles
at
1
C
outstanding
(631.2
mAh
g-1
3
C).
high
loading
5.5
mg
cm-2,
shows
area
5.1
cm-2
after
60
0.2
C.
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 12, 2025
Abstract
Lithium
(Li)
metal
is
a
promising
anode
material
for
next‐generation
high‐energy‐density
batteries.
However,
safety
concerns
and
the
limited
lifespan
due
to
Li
dendrite
formation
hinder
its
practical
application.
The
complex
process
involves
nonuniform
nucleation
radial
growth,
requiring
holistic
strategy
simultaneously
regulate
both
processes.
In
this
work,
dual‐aspect
control
developed
by
designing
protective
layer
composed
of
hydroxyapatite
(HA)
liquid
crystal
polymer
(LCP).
Electrochemical,
microstructural,
computational
analyses
revealed
that
HA
provides
homogenous
0
adsorption
sites,
enhancing
kinetics
uniformity.
Meanwhile,
LCP
self‐assembles
into
cation‐selective
channels,
promoting
Li‐ion
diffusion
regulating
growth
direction.
This
significantly
improved
plating
mitigated
formation.
Benefiting
from
strategy,
symmetric
cell
achieved
critical
current
density
5
mA
cm
−2
maintained
500
h
at
3
.
Furthermore,
in
Li–sulfur
batteries,
exhibited
exceptional
high‐rate
cycling
performance
(>10
)
with
an
average
capacity
decay
rate
only
0.056%
over
1000
cycles.
These
results
highlight
effectiveness
suppressing
dendrites
improving
stability.
Abstract
Lithium‐sulfur
(Li–S)
battery
with
high
capacity
and
energy
density
is
a
promising
next‐generation
storage
device.
However,
the
shuttle
effect
of
polysulfides
causes
low
utilization
sulfur
side
reactions
at
electrode
interface.
The
electrode/electrolyte
interface
determines
chemical
activity
electrochemical
reversibility
as
well
cycling
stability
battery.
Therefore,
ideal
in
Li–S
depends
on
loading,
fast
ion
diffusion,
effective
active
intermediates,
uniform
deposition
lithium
anode.
MXene
two
dimension
layer
structure,
good
conductivity,
abundant
terminal
groups
can
serve
carrier
to
load
sulfur,
anchor
polysulfides,
accelerate
transfer.
This
review
summarizes
three
strategies
MXene‐based
interfaces
including
host
interface,
functional
separator
anode
based
principles
challenges
In
addition,
interfacial
regulation
application
materials
focus
process
are
also
presented.
Finally,
further
prospective
discussed.
