Molecules,
Journal Year:
2025,
Volume and Issue:
30(10), P. 2092 - 2092
Published: May 8, 2025
Sodium
metal
is
a
promising
anode
material
for
sodium
batteries
(SMBs)
due
to
its
high
theoretical
specific
capacity
and
low
electrochemical
potential.
However,
practical
implementation
severely
limited
by
dendrite
formation,
which
causes
short
circuits
safety
issues.
Here,
we
introduce
separator
modification
strategy
using
Ag
nanoparticles
decorated
with
two-dimensional
diamane
on
commercial
polypropylene
(PP)
substrate
(Ag-diamane/PP)
enhance
the
performance
of
anodes
(SMAs).
The
synergistic
effect
between
sodiophilic
network
not
only
accelerates
Na⁺
transport
through
modified
but
also
reduces
interfacial
resistance.
This
dendrite-suppression
was
systematically
validated
in
situ
optical
microscopy
ex
scanning
electron
microscopy.
Symmetric
Na||Na
cells
incorporating
Ag-diamane/PP
exhibit
exceptional
cycling
stability,
maintaining
more
than
3800
h
operation
at
2
mA
cm−2
1
mAh
cm−2.
Furthermore,
full-cell
configuration
Na3V2(PO4)3@C
cathode,
separator,
Na
delivers
reversible
94.35
g−1
stable
270
cycles.
work
highlights
as
solution
advancing
dendrite-free
SMBs
long-term
stability
energy
density.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 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.
Energy Materials,
Journal Year:
2025,
Volume and Issue:
5(8)
Published: April 21, 2025
Room-temperature
sodium-sulfur
(RT
Na-S)
batteries
are
potential
candidates
for
next-generation
energy
storage
systems
because
of
low-cost
resources,
high
theoretical
capacity,
and
density.
However,
their
commercialization
is
hindered
by
the
inherent
shuttle
effect,
insulation
sulfur,
slow
catalytic
conversion.
This
study
proposes
a
novel
approach
involving
design
C/CoFe
alloy
catalyst
coupled
with
Ti3C2Tx
MXene
substrate
(C/CoFe-MXene)
as
three-dimensional
porous
conductive
sulfur
host.
Polysulfide
adsorption/catalytic
experiments
density
functional
theory
calculation
confirmed
excellent
affinity
strong
conversion
ability
C/CoFe-MXene
composite
polysulfides.
The
heterostructure
formed
between
CoFe
promotes
Na+
transport
accelerates
reaction
kinetics
species.
Consequently,
assembled
RT
Na-S
host
(2.0
mg
cm-2)
deliver
initial
specific
capacity
572
mAh
g-1
at
1
C.
Even
5
C,
battery
achieves
ultralong-term
cycling
over
5,400
cycles
retention
rate
61.9%,
corresponding
to
fading
0.0089%
per
cycle,
demonstrating
outstanding
high-rate
tolerance.
work
provides
new
insights
into
preparation
cathodes
surface
area
activity
using
catalysts
loaded
on
substrates
in
batteries.
Molecules,
Journal Year:
2025,
Volume and Issue:
30(10), P. 2092 - 2092
Published: May 8, 2025
Sodium
metal
is
a
promising
anode
material
for
sodium
batteries
(SMBs)
due
to
its
high
theoretical
specific
capacity
and
low
electrochemical
potential.
However,
practical
implementation
severely
limited
by
dendrite
formation,
which
causes
short
circuits
safety
issues.
Here,
we
introduce
separator
modification
strategy
using
Ag
nanoparticles
decorated
with
two-dimensional
diamane
on
commercial
polypropylene
(PP)
substrate
(Ag-diamane/PP)
enhance
the
performance
of
anodes
(SMAs).
The
synergistic
effect
between
sodiophilic
network
not
only
accelerates
Na⁺
transport
through
modified
but
also
reduces
interfacial
resistance.
This
dendrite-suppression
was
systematically
validated
in
situ
optical
microscopy
ex
scanning
electron
microscopy.
Symmetric
Na||Na
cells
incorporating
Ag-diamane/PP
exhibit
exceptional
cycling
stability,
maintaining
more
than
3800
h
operation
at
2
mA
cm−2
1
mAh
cm−2.
Furthermore,
full-cell
configuration
Na3V2(PO4)3@C
cathode,
separator,
Na
delivers
reversible
94.35
g−1
stable
270
cycles.
work
highlights
as
solution
advancing
dendrite-free
SMBs
long-term
stability
energy
density.
