Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 17, 2024
Abstract
Metal
single‐atom
catalysts
(SACs)
are
extensively
investigated
to
accelerate
the
sulfur
redox
kinetics
in
room‐temperature
sodium─sulfur
(Na─S)
batteries.
Nevertheless,
influence
of
structure
symmetry
SACs
center
on
electrocatalytic
mechanism
and
precise
pathway
which
active
sites
facilitate
sodium
polysulfides
(Na
2
S
n
)
conversion
remain
unknown.
To
enable
controlled
construction
highly
configuration,
herein,
Zn
with
an
asymmetrical
Zn─N
3
O
configuration
designed
for
conversion.
Both
theoretical
experimental
explorations
reveal
that
displays
higher
activity
than
4
center.
The
N/O
co‐coordination
induces
localized
charge
at
center,
strengthens
d‐p
hybridization
Na
stretches
Na─S
bond
length
,
thus
accelerating
reaction
kinetics.
Consequently,
as‐assembled
batteries
achieve
a
high
capacity
1016
mAh
g
−1
1.0
C
decay
0.0186%
per
cycle
over
1000
cycles.
This
work
uncovers
subtle
relationship
between
species
local
coordination
environment
SACs,
offers
guidance
design
efficient
different
catalysis
applications.
Advanced Materials,
Год журнала:
2024,
Номер
36(25)
Опубликована: Апрель 3, 2024
Abstract
The
catalytic
activation
of
the
Li‐S
reaction
is
fundamental
to
maximize
capacity
and
stability
batteries
(LSBs).
Current
research
on
catalysts
mainly
focuses
optimizing
energy
levels
promote
adsorption
conversion,
while
frequently
overlooking
electronic
spin
state
influence
charge
transfer
orbital
interactions.
Here,
hollow
NiS
2
/NiSe
heterostructures
encapsulated
in
a
nitrogen‐doped
carbon
matrix
(NiS
@NC)
are
synthesized
used
as
additive
sulfur
cathodes.
heterostructure
promotes
splitting
3d
orbital,
driving
Ni
3+
transformation
from
low
high
spin.
This
configuration
raises
level
activates
state.
accelerates
optimizes
energy,
lowering
barrier
polysulfides
conversion.
Benefiting
these
characteristics,
LSBs
based
@NC/S
cathodes
exhibit
initial
(1458
mAh·g⁻
1
at
0.1C),
excellent
rate
capability
(572
5C),
stable
cycling
with
an
average
decay
only
0.025%
per
cycle
1C
during
500
cycles.
Even
loadings
(6.2
mg·cm⁻
),
capacities
1173
(7.27
mAh·cm⁻
)
measured
0.1C,
1058
retained
after
300
Advanced Materials,
Год журнала:
2024,
Номер
36(25)
Опубликована: Март 8, 2024
Abstract
Room‐temperature
sodium‐sulfur
(RT‐Na/S)
batteries
are
promising
alternatives
for
next‐generation
energy
storage
systems
with
high
density
and
power
density.
However,
some
notorious
issues
hampering
the
practical
application
of
RT‐Na/S
batteries.
Besides,
working
mechanism
under
conditions
such
as
sulfur
loading,
lean
electrolyte,
low
capacity
ratio
between
negative
positive
electrode
(N/P
ratio),
is
essential
importance
applications,
yet
significance
these
parameters
has
long
been
disregarded.
Herein,
it
comprehensively
reviewed
recent
advances
on
Na
metal
anode,
S
cathode,
separator
engineering
The
discrepancies
laboratory
research
elaborately
discussed,
endeavors
toward
applications
highlighted,
suggestions
values
crucial
rationally
proposed.
Furthermore,
an
empirical
equation
to
estimate
actual
pouch
cells
proposed
first
time,
making
possible
evaluate
gravimetric
conditions.
This
review
aims
reemphasize
vital
bridge
gaps
applications.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(51)
Опубликована: Авг. 29, 2024
Abstract
The
practical
application
of
room‐temperature
sodium‐sulfur
(RT
Na−S)
batteries
is
severely
hindered
by
inhomogeneous
sodium
deposition
and
notorious
polysulfides
(NaPSs)
shuttling.
Herein,
novel
thiotellurate
(Na
2
TeS
3
)
interfaces
are
constructed
both
on
the
cathode
anode
for
Na−S
to
simultaneously
address
Na
dendritic
growth
On
side,
a
heterostructural
sulfide/sodium
telluride
embedded
in
carbon
matrix
S/Na
Te@C)
rationally
designed
through
facile
carbothermal
reaction,
where
interface
will
be
situ
chemically
obtained.
Such
an
provides
abundant
electron/ion
diffusion
channels
ensures
rich
catalytic
surfaces
toward
redox,
which
could
significantly
improve
utilization
active
material
alleviate
shuttling
cathode.
inevitable
formation
soluble
polytellurosulfides
species
migrate
surface,
finally
constructing
compact
smooth
solid‐electrolyte
interphase
(SEI)
layer.
electrochemical
formed
can
enhance
ionic
transport
stabilize
deposition,
thus
realizing
dendrite‐free
Na‐metal
plating/stripping.
Benefitting
from
these
advantages,
anode‐free
cell
fabricated
with
Te@C
exhibits
ultrahigh
initial
discharge
capacity
634
mAh
g
−1
at
0.1
C,
pave
new
path
design
high‐performance
cathodes
RT
batteries.
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 16, 2024
Room
temperature
sodium-sulfur
batteries
(RT
Na-S)
have
garnered
significant
attention
for
their
high
energy
density
and
cost-effectiveness,
positioning
them
as
a
promising
alternative
to
lithium-ion
batteries.
However,
they
encounter
challenges
such
the
dissolution
of
sodium
polysulfides
sluggish
kinetics.
Introducing
high-activity
electrocatalysts
enhancing
active
sites
represents
an
efficient
strategy
enhance
reaction
Here,
amorphous
Ni-B
material
that
undergoes
electrochemical
evolution
generate
NiS
The Journal of Chemical Physics,
Год журнала:
2025,
Номер
162(5)
Опубликована: Фев. 3, 2025
CoTe2
and
CoSe2
alloys
have
garnered
considerable
attention
in
thermoelectric
applications
due
to
their
high
electrical
conductivity,
tunable
electronic
properties,
potential
for
power
factors.
In
this
study,
the
phase
formation
behavior
transport
properties
of
a
CoTe2–CoSe2
solid
solution
alloy
were
investigated
by
synthesizing
series
Co(Te1−xSex)2
compositions,
where
x
=
0,
0.25,
0.50,
0.75,
1.0.
For
orthorhombic
was
observed,
while
cubic
coexisted.
Up
factor
decreased
slightly
as
Hall
mobility
density-of-state
effective
mass
decreased.
The
total
thermal
conductivity
increased
owing
decrease
lattice
conductivity.
Despite
no
significant
increase
zT
values
observed
range
0.25–0.50
more
pronounced
factor.
Nevertheless,
exhibited
higher
factors
thus
0.13
at
700
K.
Further
analysis
based
on
single
Kane
band
model
suggests
that
enhancement
could
be
achieved
reducing
carrier
concentration
from
∼1021
∼1019
cm−3
all
compositions.
Nanomaterials,
Год журнала:
2025,
Номер
15(5), С. 330 - 330
Опубликована: Фев. 20, 2025
Sodium-sulfur
batteries
have
been
provided
as
a
highly
attractive
solution
for
large-scale
energy
storage,
benefiting
from
their
substantial
storage
capacity,
the
abundance
of
raw
materials,
and
cost-effectiveness.
Nevertheless,
conventional
sodium-sulfur
subject
critique
due
to
high
operating
temperature
costly
maintenance.
In
contrast,
room-temperature
exhibit
significant
advantages
in
these
regards.
The
most
commonly
utilized
cathode
active
material
is
S8
molecule,
whose
intricate
transformation
process
plays
crucial
role
enhancing
battery
capacity.
However,
this
concomitantly
generates
quantity
polysulfide
intermediates,
leading
diminished
kinetics
reduced
utilization
efficiency.
pivotal
strategy
design
catalysts
with
adsorption
catalytic
functionalities,
which
can
be
applied
cathode.
Herein,
we
present
summary
current
research
progress
terms
nanostructure
engineering,
catalyst
strategies,
regulating
sulfur
species
conversion
pathways
perspective
high-performance
host
strategy.
A
comprehensive
analysis
performance
four
perspectives:
metal
catalysts,
compound
atomically
dispersed
heterojunctions.
Finally,
analyze
bottlenecks
challenges,
offering
some
thoughts
suggestions
overcoming
issues.
Advanced Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 31, 2025
Abstract
Enhancing
Li
2
S
deposition
and
oxidation
kinetics
in
lithium‐sulfur
batteries,
especially
the
potential‐limiting
step
under
lean
electrolyte,
can
be
effectively
achieved
by
developing
conductive
catalysts.
In
this
study,
using
ZnMoO
4
as
precursors,
Zn‐doped
molybdenum
carbide
microflowers
(Zn‐Mo
C)
composed
of
speared
porous
sheets
are
fabricated
with
a
hierarchically
ordered
structure.
Density
functional
theory
calculations
indicate
that
Zn
doping
shifts
d‐band
center
on
Mo
atoms
C
upward,
promotes
elevation
certain
antibonding
orbitals
Mo─S
bonds
above
Fermi
level,
enhances
d‐p
interaction
between
lithium
polysulfides
(LiPSs)
catalysts,
weakens
both
S─S
Li─S
LiPSs.
Incorporating
significantly
reduces
Gibbs
free
energy
barrier
for
rate‐limiting
→
conversion,
from
0.52
eV
to
just
0.05
C.
Thus,
synthesized
Zn‐Mo
demonstrates
impressive
bifunctional
electrocatalytic
performance,
advancing
sulfur
reduction
decomposition.
Moreover,
modification
charge
transfer
within
C/LiPSs
system,
synergistically
accelerating
oxidation.
The
C/S
cathode
electrochemical
achieves
remarkable
cycling
stability
minimal
capacity
decay
0.021%
per
cycle
over
1000
cycles
at
5
C,
underscoring
its
potential
high‐energy
applications.
Journal of the American Chemical Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 20, 2025
Sodium-sulfur
batteries
face
significant
challenges
due
to
the
high
solubility
of
sodium
polysulfides
and
resulting
shuttle
effect,
which
compromise
cycling
stability
efficiency.
This
study
introduces
Cu(111)
facet-selective
reactivity
sulfur
redox,
promotes
formation
a
stable
intermediate,
NaCu5S3,
enabling
efficient
conversion,
rapid
ionic
transport,
fully
solid-solid
reaction
pathway.
The
system
achieves
exceptional
performance,
retaining
specific
capacity
602
mAh
g-1
over
800
cycles
at
0.5
A
delivering
463
current
density
5
in
ether-based
electrolytes,
representing
highest
rate
capability
reported
for
cathodes
with
content
≥
60
wt
%.
Comparative
studies
Cu(100),
Cu(110),
aluminum
substrates
highlight
unique
Cu(111).
Density
functional
theory
calculations
further
reveal
structural
electronic
interactions
between
copper
polysulfides,
clarifying
facet-dependent
mechanisms.
work
establishes
facet
engineering
as
promising
approach
modulating
redox
pathways
improving
electrochemical
reversibility
metal-sulfur
batteries.
