Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 10, 2025
Abstract
Silicon
is
a
promising
anode
for
lithium‐ion
batteries
but
suffers
tremendous
volume
change
during
cycling.
Scalable
and
low‐cost
fabrication
of
silicon
anodes
with
minimized
internal
stress,
avoiding
electrode
degradation
capacity
decline,
remains
significant
challenge.
Herein,
planar
demonstrates
stress
release
in
the
at
electrochemical
cycling,
which
indicates
favorable
areal
3.4
mAh
cm
−2
stable
specific
810
g
−1
even
after
600
cycles
remarkable
current
density
3.6
A
.
Such
good
results
are
mainly
ascribed
to
structure
that
changes
expansion
direction,
enables
relief
electrode.
In
addition,
provides
abundant
contact
area,
aligns
stack
then
shortens
ion
diffusion.
This
work
useful
insights
on
through
engineering
revolutionizes
traditional
design
batteries,
ensuring
energy
storage
devices
transcend
limitations.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(40)
Published: April 19, 2024
Abstract
Silicon
(Si)
is
considered
to
be
the
promising
candidate
anode
for
next
generation
of
high‐energy‐density
batteries.
However,
poor
initial
coulombic
efficiency
(ICE)
and
rate
performance
severely
hinder
its
commercial
development.
Here,
fully
exploits
2D
structure
photovoltaic
silicon
waste
(PV‐WSi),
combining
with
advantage
controllable
depositing
layers
offered
by
fluidized
bed
atomic
layer
deposition
(FBALD),
simultaneously
achieve
high
ICE
highrate
Si‐based
anodes.
The
characteristic
Li
+
embedding
vertically
into
plane
direction
sheet‐like
PV‐WSi
helps
shorten
diffusion
distance,
alleviating
pulverization
problem
caused
volume
expansion.
FBALD
utilized
controllably
deposit
2
O
(≈1
nm)
TiO
(≈4
compensate
loss
sources,
further
suppressing
expansion
Si
isolating
side
reactions
between
electrolyte.
prepared
Si@Li
O@TiO
demonstrates
ultrahigh
(90.9%)
outstanding
(>900
mAh
g
−1
at
a
20
A
).
Full
cells
LiFePO
4
cathode
deliver
stable
capacity
100
after
300
cycles
0.5
C.
This
work
provides
new
ideas
development
ICE,
high‐rate
anodes
based
on
low‐cost
waste.
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 2, 2024
Abstract
Silicon
(Si)‐based
anodes
hold
great
potential
for
next‐generation
lithium‐ion
batteries
(LIBs)
due
to
their
exceptional
theoretical
capacity.
However,
practical
application
is
hindered
by
the
notably
substantial
volume
expansion
and
unstable
electrode/electrolyte
interfaces
during
cycling,
leading
rapid
capacity
degradation.
To
address
these
challenges,
we
have
engineered
a
porous
nitrogen/sulfur
co‐doped
carbon
layer
(CBPOD)
uniformly
encapsulate
Si,
providing
multifunctional
protective
coating.
This
innovative
design
effectively
passivates
interface
mitigates
volumetric
of
Si.
The
N/S
co‐doping
framework
significantly
enhances
electronic
ionic
conductivity.
Furthermore,
carbonization
process
augments
elastic
modulus
CBPOD
reconstructs
Si‐CBPOD
interface,
facilitating
formation
robust
chemical
bonds.
These
features
collectively
contribute
high
performance
anodes,
which
demonstrate
reversible
1110.8
mAh
g
−1
after
1000
cycles
at
4
A
an
energy
density
574
Wh
kg
with
retention
over
75.6%
300
0.2
C.
study
underscores
in
enhancing
Si
pathway
development
composite
materials
superior
prolonged
cyclic
stability,
thereby
advancing
high‐performance
LIBs.
Small,
Journal Year:
2024,
Volume and Issue:
20(46)
Published: Aug. 1, 2024
Abstract
To
effectively
solve
the
challenges
of
rapid
capacity
decay
and
electrode
crushing
silicon‐carbon
(Si‐C)
anodes,
it
is
crucial
to
carefully
optimize
structure
Si‐C
active
materials
enhance
their
electron/ion
transport
dynamic
in
electrode.
Herein,
a
unique
hybrid
microsphere
Si/C/CNTs/Cu
with
surface
wrinkles
prepared
through
simple
ultrasonic
atomization
pyrolysis
calcination
method.
Low‐cost
nanoscale
Si
waste
embedded
into
carbon
matrix,
cleverly
combined
flexible
electrical
conductivity
nanotubes
(CNTs)
copper
(Cu)
particles,
enhancing
both
crack
resistance
kinetics
entire
material.
Remarkably,
as
lithium‐ion
battery
anode,
fabricated
exhibits
stable
cycling
for
up
2300
cycles
even
at
current
2.0
A
g
−1
,
retaining
≈700
mAh
retention
rate
100%
compared
started
.
Additionally,
when
paired
an
NCM523
cathode,
full
cell
135
after
100
1.0
C.
Therefore,
this
synthesis
strategy
provides
insights
design
long‐life,
practical
anode
micro/nano‐spherical
structures.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 14, 2024
Abstract
Yolk‐shell
structured
silicon/carbon
(YS‐Si/C)
anode
materials
show
promise
for
commercial
lithium‐ion
batteries
(LIBs)
because
of
their
high
specific
capacity
and
excellent
cycling
life.
However,
commercialization
has
not
been
realized
despite
nearly
a
decade
research,
primarily
due
to
poor
mechanical
strength,
limited
rate
capability,
low
energy
density.
This
study
reports
hierarchical
YS‐Si/C
material
synthesized
via
thermal
chemical
vapor
deposition
the
growth
vertical
graphene
sheets
(VGSs),
polymer
self‐assembly,
one‐step
carbonization,
which
establishes
connections
between
Si
core
carbon
shell
through
VGSs,
enhancing
electrochemical
characteristics
material.
The
unique
outperforms
VGSs‐free
composites,
presents
1683.2
mAh
g
−1
at
0.1
C,
performance
552.2
10
superior
retention
80.1%
after
1000
cycles.
When
matched
with
LiNi
0.8
Co
Mn
O
2
cathodes,
ampere‐hour‐level
pouch
cell
delivers
gravimetric
volumetric
densities
429.2
Wh
kg
1083
L
,
respectively.
Finite
element
analysis
shows
that
VGSs
reduce
stress
concentration
on
shell,
helping
hollow
withstand
industrial
electrode
calendaring.
work
demonstrates
potential
application
in
practical
LIBs.
