Inorganic Chemistry,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 12, 2024
Sodium-ion
batteries
(SIBs)
have
emerged
as
potential
alternatives
to
lithium-ion
(LIBs),
particularly
for
large-scale
applications.
Alloy-type
anode
materials
sodium-ion
are
esteemed
prospective
candidate
anodes,
owing
their
elevated
theoretical
capacity,
heightened
utilization
efficiency,
and
minimal
production
of
insulating
byproducts.
However,
the
severe
volume
changes
sluggish
ion
diffusion
kinetics
can
lead
irreversible
particle
fragmentation
reaggregation
phenomena,
ultimately
resulting
in
electrode
degradation.
Additionally,
repetitive
cause
an
unstable
solid
electrolyte
interphase
(SEI).
This
study
presents
synthesis
chloride-ion-modulated
bimetallic
SnSb/C
nanoparticle
materials,
highlighting
following
advantages:
(i)
Designing
a
SnSb
alloy
structure
serves
buffer
structural
stresses
generated
during
sodium
insertion/extraction
processes,
effectively
mitigating
fracture
phenomena
induced
by
material
expansion/contraction.
(ii)
Nanostructuring
both
enables
full
active
shortens
pathways,
thereby
significantly
enhancing
rate
ions.
(iii)
Introducing
carbonaceous
matrix
alleviate
self-agglomeration
charge/discharge
cycles,
material's
conductivity
stability.
(iv)
Utilizing
chloride-ion
interface
modification
achieve
chloride-rich
solid-electrolyte
(SEI)
enhances
battery
performance.
Chemical Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Silicon
(Si)
is
considered
a
promising
anode
material
for
next-generation
lithium-ion
batteries
due
to
its
high
theoretical
specific
capacity
and
earth-abundancy.
However,
challenges
such
as
significant
volume
expansion,
unstable
solid
electrolyte
interphase
(SEI)
formation
in
incompatible
electrolytes,
slow
transport
lead
poor
cycling
rate
performance.
In
this
work,
it
demonstrated
that
superior
cyclability
capability
of
Si
anodes
can
be
achieved
using
ethyl
fluoroacetate
(EFA)
fluoroethylene
carbonate
(FEC)
solvents
with
low
binding
energy
Li+
but
sufficiently
relative
dielectric
constants.
By
weakening
the
interaction
between
solvent,
barrier
desolvation
process
lowered,
while
ensuring
conductivity
diffusion
Li+.
As
result,
silicon-carbon
optimized
exhibits
excellent
performance,
work
reversibly
1709.1
mAh
g-1
proceeds
over
250
cycles
retains
85.2%
at
0.2C.
Furthermore,
Si/C‖LiFePO4
(LFP)
full
cell
shows
an
extended
service
life
more
than
500
cycles.
This
offers
valuable
insights
into
design
weakly
solvating
electrolytes
high-performance
Si-based
batteries.
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 18, 2024
Silicon
(Si)
is
a
promising
anode
material
for
next-generation
lithium-ion
batteries
(LIBs)
due
to
its
high
specific
capacity
and
abundance.
However,
challenges
such
as
significant
volume
expansion
during
cycling
poor
electrical
conductivity
hinder
large-scale
application.
In
this
study,
the
multifunction
of
sodium
polyacrylate
(PAAS)
utilized
develop
hierarchical
porous
silicon-carbon
(Si/SiO
Materials,
Journal Year:
2024,
Volume and Issue:
17(13), P. 3189 - 3189
Published: June 29, 2024
Silicon
(Si)
shows
great
potential
as
an
anode
material
for
lithium-ion
batteries.
However,
it
experiences
significant
expansion
in
volume
undergoes
the
charging
and
discharging
cycles,
presenting
challenges
practical
implementation.
Nanostructured
Si
has
emerged
a
viable
solution
to
address
these
challenges.
requires
complex
preparation
process
high
costs.
In
order
explore
above
problems,
this
study
devised
innovative
approach
create
Si/C
composite
anodes:
micron-porous
silicon
(p-Si)
was
synthesized
at
low
cost
lower
silver
ion
concentration,
then
porous
silicon-coated
carbon
(p-Si@C)
composites
were
prepared
by
compositing
nanohollow
spheres
with
silicon,
which
had
good
electrochemical
properties.
The
initial
coulombic
efficiency
of
76.51%.
After
undergoing
250
cycles
current
density
0.2
A·g−1,
exhibited
capacity
1008.84
mAh·g−1.
Even
when
subjected
1
sustained
discharge
485.93
mAh·g−1
even
after
completing
1000
cycles.
employment
micron-structured
p-Si
improves
cycling
stability,
is
primarily
due
space
provides.
This
structure
helps
alleviate
mechanical
stress
caused
prevents
particles
from
detaching
electrodes.
increased
surface
area
facilitates
longer
pathway
transport,
thereby
encouraging
more
distribution
lithium
ions
mitigating
localized
during
cycling.
Additionally,
expand,
hollow
nanospheres
are
capable
absorbing
resulting
stress,
thus
preventing
electrode
cracking.
as-prepared
utilizing
metal-assisted
chemical
etching
holds
promising
prospects
