Sulfide
solid
electrolytes
have
potential
in
practical
all-solid-state
batteries
owing
to
their
high
formability
and
ionic
conductivity.
However,
sulfide
are
limited
by
the
generation
of
toxic
hydrogen
conductivity
deterioration
upon
moisture
exposure.
Although
numerous
studies
investigated
hydrolysis
degradation
induced
"moisture,"
influence
"atmospheric
gases"
during
exposure
has
not
been
extensively
despite
importance
for
fabrication.
Therefore,
this
study,
we
impact
atmospheric
gases
on
an
argyrodite-type
Li
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(48)
Опубликована: Авг. 6, 2024
Abstract
The
practical
usage
of
Na
metal
anode
is
severely
prohibited
by
the
instability
natively
formed
solid
electrolyte
interface
(SEI)
layer
and
uncontrollable
dendrite
growth,
inducing
short
cycle
life
serious
safety
concerns.
Herein,
phosphorylated
covalent
organic
frameworks
(P‐COF)
first
synthesized
rationally
used
to
construct
robust
artificial
for
stabilization.
modified
demonstrates
high
rate
performance
(5
mA
cm
−2
)
ultralong
cycling
lifespan
(1800
h)
with
dendrite‐free
deposition
in
carbonate‐based
electrolyte.
And
assembled
Na|Na
3
V
2
(PO
4
(NVP)
cell
also
reveals
extraordinarily
stable
at
5
C
4000
cycles
a
quite
low
decay
0.002%
per
cycle.
Moreover,
Na|NVP
full
areal
capacity
(2.0
mAh
thin
(30
µm)
still
prolonged
over
500
even
under
harsh
condition
negative‐to‐positive‐capacity
(N/P)
ratio
2:3.
Furthermore,
pouch
an
ultrathick
cathode
(≈17
mg
manifests
significantly
performance.
This
work
facile
effective
strategy
toward
reliable
batteries.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 26, 2024
Abstract
Sodium
(Na)
metal
is
regarded
as
an
ideal
anode
for
sodium
batteries
(SMBs)
due
to
its
high
theoretical
specific
capacity
and
low
electrochemical
potential.
However,
utilization
still
restricted
by
the
notorious
dendrites
unstable
solid
electrolyte
interface
(SEI).
Herein,
a
zinc
nanoparticle
decorated
2D
diamond
(diamane)
modulated
commercial
polypropylene
(Zn‐diamane/PP)
separator
dedicated
mitigating
these
issues
longevity
of
anodes.
Interestingly,
sodiophilic
Zn‐diamane/PP
significantly
accelerates
ion
mobilization
promotes
uniform
flux,
thus
effectively
preventing
dendrite
growth
enhancing
stability
SEI
layer.
A
Na||Na
symmetric
cell
with
demonstrates
prolonged
lifespan
exceeding
5000
h
at
1
mA
cm
−2
mAh
.
Notably,
it
sustains
>1000
ultra‐high
current
density
25
The
dendrite‐free
deposition
morphology
formation
inorganic‐rich
inner
layer
have
been
investigated
through
comprehensive
characterizations
calculations
analysis.
Furthermore,
full
comprising
Na
3
V
2
(PO
4
)
@C
cathode,
separator,
demonstrate
reversible
90
g
−1
over
500
cycles.
These
results
potential
long‐cycle
SMBs.
The
development
of
sodium-metal
batteries
faces
challenges,
particularly
Na
dendrite
growth
resulting
from
uneven
plating/stripping
and
side
reactions
between
metal
the
electrolyte.
Herein,
a
Ag
interfacial
layer
on
sodium
surface
is
proposed.
Benefiting
its
excellent
sodiophilicity,
coating
works
as
nucleation
sites
that
guide
uniform
deposition.
Simultaneously,
conductivity
ensures
homogeneous
electric
field
distribution
ion
flux,
which
also
contribute
to
Furthermore,
strong
interaction
PF6-
induces
construction
NaF-rich
solid
electrolyte
interphase,
contributes
stabilizing
interface
suppressing
reactions.
Consequently,
symmetric
cells
demonstrate
high
cycling
stability
over
1000
h
at
3
mA
cm-2.
Moreover,
full
achieve
an
impressive
capacity
retention
rate
90%
after
800
cycles
20
C
performance
even
across
various
temperatures.
Materials,
Год журнала:
2025,
Номер
18(10), С. 2397 - 2397
Опубликована: Май 21, 2025
Hard
carbon
(HC)
anodes
for
sodium-ion
batteries
(SIBs)
face
challenges
such
as
sluggish
Na⁺
diffusion
kinetics
and
structural
instability.
Herein,
we
propose
a
synergistic
nitrogen-doping
defect-engineering
strategy
to
unlock
ultrahigh-rate
capability
long-term
cyclability
in
biomass-derived
hard
carbon.
A
scalable
synthesis
route
is
developed
via
hydrothermal
carbonization
of
corn
stalk,
followed
by
controlled
pyrolysis
with
urea,
achieving
uniform
nitrogen
incorporation
into
the
matrix.
Comprehensive
characterization
reveals
that
doping
introduces
tailored
defects,
expands
interlayer
spacing,
optimizes
surface
pseudocapacitance.
The
resultant
N-doped
(NC-2)
delivers
remarkable
reversible
capacity
259
mAh
g−1
at
0.1
91%
retention
after
100
cycles.
And
analysis
demonstrates
dual
storage
mechanism
combining
surface-driven
pseudocapacitive
adsorption
(89%
contribution
1.0
mV
s−1)
diffusion-controlled
intercalation
facilitated
reduced
charge
transfer
resistance
(56.9
Ω)
enhanced
ionic
pathways.
Notably,
NC-2
exhibits
exceptional
rate
performance
(124.0
g−1)
sustains
95%
over
500
cycles
g−1.
This
work
establishes
universal
paradigm
carbonaceous
materials,
offering
fundamental
insights
structure–property
correlations
paving
way
sustainable,
high-performance
SIB
anodes.
