Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 25, 2025
Abstract
The
rational
design
of
abundant
and
efficient
active
sites
for
lithium‐sulfur
electrocatalysis
remains
a
long‐standing
challenge,
wherein
the
optimization
catalyst
activity
by
manipulating
their
sizes
has
stimulated
extensive
exploration.
Herein,
fine‐grain
strengthening
strategy
is
proposed
vanadium‐nitrogen‐carbon
(VNC)
comprising
vanadium
(V)‐based
units,
throughout
modulating
size
surface
energy
via
salt‐template
recrystallization.
recrystallization
frequency
dictated
to
precisely
tune
effect.
Through
rigorous
procedure
5‐time
recrystallization,
V‐based
units
realize
reduction
from
209
99
Å,
increase
0.16
0.32
eV
Å
−2
,
along
with
specific
area
adjustment
41.5
206.3
m
2
g
−1
.
Accordingly,
effect
effectively
activates
in
i)
enhancing
sulfur
species
adsorption
propelling
Li
S
nucleation/decomposition
reaction
kinetics;
ii)
guiding
high‐flux
uniform
lithium‐ions
thus
promoting
lithium
plating/stripping
behaviors.
Consequently,
battery
demonstrates
an
initial
discharge
capacity
1236.4
mA
h
at
0.2
C.
Even
after
600
cycles
2.0
C,
cycle‐to‐cycle
attenuation
merely
0.048%.
Furthermore,
pouch
cell
strengthened
VNC
can
proceed
stable
cycling
operation
1.0
ensuring
reliable
consistent
power
supply
electronic
gadgets.
RSC Advances,
Год журнала:
2025,
Номер
15(4), С. 2582 - 2590
Опубликована: Янв. 1, 2025
Heteroatom-doped
hierarchical
porous
carbon
(AF-MMTC)
was
prepared
with
hard
template
and
salt
dual
templating
agents,
the
synergistically
construct
pore
structures
at
different
scales.
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 25, 2025
Abstract
The
electrostatic
interaction
between
zinc
ions
and
the
host
structure
significantly
limits
practicality
of
vanadium‐based
cathodes
in
aqueous
zinc‐ion
batteries
(AZIBs).
Herein,
an
anion
doping
strategy
is
demonstrated
to
mitigate
resistance
steric
hindrance
during
ion
insertion
by
incorporating
iodine
atoms
into
lattice
cathode
material,
Na
2
V
6
O
16
·3H
O.
Iodine
reduces
adsorption
energy
at
most
stable
site,
thereby
weakening
Zn
2+
‐host
lowering
diffusion
barrier,
resulting
a
one‐order‐of‐magnitude
increase
coefficient.
Moreover,
large
atomic
size
expands
lattice,
creating
ample
space
for
increased
storage
capacity,
further
supported
introduced
oxygen
vacancies.
As
result,
iodine‐doped
achieves
impressive
specific
capacity
528.8
mAh
g
−1
current
density
0.5
A
,
retains
262
after
12,000
cycles
high
rate
10
.
This
work
provides
new
insights
design
high‐performance
materials
AZIBs.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(49)
Опубликована: Авг. 6, 2024
Abstract
Attracted
by
the
high
specific
capacity
and
energy
density,
transition
metal‐sulfides
exhibit
great
application
potential
as
sodium‐ion
batteries
anode,
but
still
suffer
from
uncontrolled
separation
of
M/S
phase
inferior
conductivity.
Herein,
flower‐like
Fe
1‐x
S@Sb@C
(FF)
is
rationally
tailored,
accompanied
double‐layer
heterojunctions
C–S–Sb/Sb–S–Fe
“bridge”
bonds.
Meanwhile,
bimetallic
phases/boundary
defects
built‐in
electric
fields
are
formed
with
a
strong
electronic
coupling
effect,
effectively
alleviating
(Fe/Sb
S),
significantly
enhancing
ion/e
−
As
expected,
FF
delivers
an
ultra‐fast
sodium‐ions
storage
rate
436.5/334.3
mAh
g
−1
even
at
10.0/20.0
A
.
When
operation
temperature
lowered
to
‐5
°C,
reversible
can
remain
≈349.7
Assisted
detailed
kinetic
analysis
theoretical
calculations,
their
ion‐storage
abilities
mainly
derive
improved
interfacial
Na
+
/e
transfer
surface/near‐surface
redox
behaviors.
Moreover,
reassembling
evolution
active
phases
revealed
in/ex
situ
techniques,
further
demonstrating
stable
adsorption/anchoring
intermediate
reaction
products
Fe/Sb–S
on
heterointerface,
accompanying
conversion‐alloying
reaction.
Given
this,
this
interesting
work
anticipated
offer
in‐depth
insight
into
fading
mechanism,
effective
strategy
design
metal‐sulfur
anodes
for
advanced
systems.
