Nano Letters,
Год журнала:
2024,
Номер
24(47), С. 15085 - 15091
Опубликована: Ноя. 14, 2024
Alkali
metal
batteries
have
high
energy
densities
required
to
power
future
devices;
however,
uneven
deposition
is
a
critical
barrier
achieving
long
lifespans.
We
developed
an
elegant
noncryogenic
transmission
electron
microscopy
method
which
has
facilitated
the
first
observations
of
epitaxial
in
alkali
batteries.
Using
this
method,
we
confirmed
interactions
between
(002)
sodium
crystallite
planes
and
(01-11)
zinc
current
collectors.
Such
decrease
nucleation
barriers
promote
even
growth.
This
study
offers
fresh
inspiration
for
development
techniques
tailored
electron-sensitive
battery
materials
sets
new
agenda
technologies.
Chemical Society Reviews,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
This
review
explores
the
latest
advancements
in
potassium
metal
batteries,
including
electrode
design,
interface
engineering,
and
electrolyte
optimization
to
suppress
dendrite
formation
enhance
cycling
stability.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 17, 2025
Abstract
Sulfur
offers
a
high‐energy‐density,
low‐cost,
and
sustainable
alternative
to
traditional
battery
cathodes,
but
its
practical
use
is
limited
by
sluggish
uneven
reaction
polysulfide
dissolution,
necessitating
electrocatalytic
additives
enhance
conversion
efficiency.
Generating
unpaired
spin
electrons
has
proven
effective
in
enhancing
performance
Co‐based
electrocatalysts.
These
increase
adsorption
weakening
S─S
bonds,
facilitating
their
cleavage
during
sulfur
reduction
reactions.
This
work
extends
the
strategy
Fe–Ni‐based
catalysts.
The
synthesis
of
NiSe
2
Fe‐doped
particles
reported
investigate
impact
Fe
doping
on
electronic
structure,
catalytic
activity,
introduced
as
coating
cathode
side
Li–S
(LSB)
separator.
Experimental
analyses
first‐principles
calculations
reveal
that
Fe‐rich
cores
surface
density
states
at
Fermi
level
introduce
electrons,
boosting
LiPS
conversion.
synergistic
effects
significantly
improve
performance,
cycling
stability,
overall
LSB
cells.
Specifically,
cells
based
‐based
separators
achieve
specific
capacities
1483
mAh
g⁻¹
0.1C
1085
1C,
along
with
remarkable
retaining
84.4%
capacity
after
800
cycles.
High
sulfur‐loading
tests
further
validate
multifunctional
membrane's
effectiveness,
showing
significant
retention
reduced
loss.
Journal of the American Chemical Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 27, 2025
Room-temperature
sodium–sulfur
(Na–S)
batteries
are
emerging
as
a
promising
next-generation
energy
storage
technology,
offering
high
densities
at
low
cost
and
utilizing
abundant
elements.
However,
their
practical
application
is
hindered
by
the
shuttle
effect
of
sodium-polysulfides
sluggish
kinetics
sulfur
redox
reactions.
In
this
study,
we
demonstrate
heteronuclear
diatomic
catalyst
featuring
Fe
Co
bimetallic
sites
embedded
in
nitrogen-doped
hollow
carbon
nanospheres
(Fe–Co/NC)
an
effective
host
cathode
Na–S
batteries.
Aberration-corrected
high-angle
annular
dark
field
scanning
transmission
electron
microscopy
demonstrates
presence
isolated
Fe–Co
atomic
pairs,
while
synchrotron
radiation
X-ray
absorption
fine
structure
analysis
confirms
(Fe–Co–N6)
coordination
structure.
Density
functional
theory
calculations
show
that
introduction
atoms
induces
delocalization
Co(II),
shifting
electronic
configuration
from
low-spin
to
higher-spin
state.
This
shift
enhances
hybridization
dz2
orbitals
with
antibonding
π
within
sodium
sulfide
species
accelerates
catalytic
conversion.
As
result,
Fe–Co/NC-based
cathodes
exhibit
excellent
cycling
stability
(378
mAh
g–1
after
2000
cycles)
impressive
rate
performance
(341.1
under
5
A
g–1).
With
the
extremely
high
theoretical
energy
densities,
secondary
batteries
including
lithium-sulfur
(Li-S)
and
sodium-sulfur
(Na-S)
are
anticipated
to
become
leading
candidates
among
metal-sulfur
batteries.
However,
practical
density
storage
efficiency
of
Li/Na-sulfur
significantly
hindered
by
several
issues:
low
conductivity
sulfur
cathodes,
substantial
volume
changes
during
charge
discharge
cycles,
shuttle
effect
caused
metal
polysulfides,
uncontrollable
dendrite
formation
on
reactive
alkali
anodes,
which
also
heighten
safety
concerns.
Constructing
functionalized
separators
is
considered
one
most
promising
strategies
overcome
these
challenges
enhance
performance
Functionalized
offer
numerous
advantages
such
as
enhanced
mechanical
stability,
bifunctionality
in
suppressing
growth,
minimal
impact
battery
volume.
comprehensive
reviews
relatively
fewer,
while
related
research
has
increased
significantly.
In
this
context,
it
crucial
provide
a
review
recent
advances
for
First,
offers
an
in-depth
analysis
current
issues
faced
summarizes
requirements
improving
Subsequently,
detailed
discussion
presented
about
performances
applications
especially
inhibition
growth
suppression
Li-S
Na-S
Finally,
addresses
potential
future
directions
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(40), С. 27400 - 27408
Опубликована: Янв. 1, 2024
A
unique
grain-boundary-rich
cobalt
selenide
hollow
multi-shelled
structure
(GB-CoSe
HoMS)
has
been
rationally
designed
and
synthesized
as
a
high-efficiency
electrocatalyst
to
adsorb
convert
the
polysulfides
for
lithium–sulfur
batteries.
