Small,
Journal Year:
2023,
Volume and Issue:
19(47)
Published: July 23, 2023
Urgent
calls
for
reversible
cycling
performance
of
silicon
(Si)
requires
an
efficient
solution
to
maintain
the
silicon-electrolyte
interface
stable.
Herein,
a
conductive
biphenyl-polyoxadiazole
(bPOD)
layer
is
coated
on
Si
particles
enhance
electrochemical
process
and
prolong
cells
lifespan.
The
conformal
bPOD
coatings
are
mixed
ionicelectronic
conductors,
which
not
only
inhibit
infinite
growth
solid
electrolyte
interphase
(SEI)
but
also
endow
electrodes
with
outstanding
ion/electrons
transport
capacity.
superior
3D
porous
structure
in
continuous
phase
allows
layers
act
like
sponge
buffer
volume
variation,
resulting
high
structural
stability.
situ
polymerized
coating
it-driven
thin
LiF-rich
SEI
remarkably
improve
lithium
storage
anodes,
showing
specific
capacity
1600
mAh
g-1
even
after
500
cycles
at
1
A
along
excellent
rate
over
1500
3
.
It
should
be
noticed
that
long
cycle
life
800
1065
can
achieved
retention
more
than
80%.
Therefore,
we
believe
this
unique
polymer
design
paves
way
widespread
adoption
next-generation
lithium-ion
batteries.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(29)
Published: April 5, 2023
Abstract
Constructing
a
homogenous
and
inorganic‐rich
solid
electrolyte
interface
(SEI)
can
efficiently
improve
the
overall
sodium‐storage
performance
of
hard
carbon
(HC)
anodes.
However,
thick
heterogenous
SEI
derived
from
conventional
ester
electrolytes
fails
to
meet
above
requirements.
Herein,
an
innovative
interfacial
catalysis
mechanism
is
proposed
design
favorable
in
by
reconstructing
surface
functionality
HC,
which
abundant
CO
(carbonyl)
bonds
are
accurately
homogenously
implanted.
The
act
as
active
centers
that
controllably
catalyze
preferential
reduction
salts
directionally
guide
growth
form
homogenous,
layered,
SEI.
Therefore,
excessive
solvent
decomposition
suppressed,
Na
+
transfer
structural
stability
on
HC
anodes
greatly
promoted,
contributing
comprehensive
enhancement
performance.
optimal
exhibit
outstanding
reversible
capacity
(379.6
mAh
g
−1
),
ultrahigh
initial
Coulombic
efficiency
(93.2%),
largely
improved
rate
capability,
extremely
stable
cycling
with
decay
0.0018%
for
10
000
cycles
at
5
A
.
This
work
provides
novel
insights
into
smart
regulation
chemistry
realize
high‐performance
sodium
storage.
Energy & Environmental Science,
Journal Year:
2023,
Volume and Issue:
16(3), P. 1166 - 1175
Published: Jan. 1, 2023
A
uniform
and
elastic
SEI
was
constructed
by
in
situ
electro-polymerization
of
functionalized
ionic
liquid
electrolyte
to
passivate
the
electrode
surface,
thus
making
potassium
or
lithium
based
batteries
exhibit
excellent
electrochemical
performance.
Advanced Energy Materials,
Journal Year:
2023,
Volume and Issue:
13(24)
Published: May 5, 2023
Abstract
The
development
of
high‐performance
electrode
materials
is
a
long
running
theme
in
the
field
energy
storage.
Silicon
undoubtedly
among
most
promising
next‐generation
anode
material
for
lithium
batteries.
Of
particular
note,
use
nano‐Si,
as
milestone
advance,
has
opened
door
commercialization
silicon,
but
still
hindered
by
issues
related
to
cost,
side
reactions,
and
volumetric
performance.
Micro‐Si,
competed
unsuccessfully
with
nano‐Si
ago,
now
returned
its
natural
strengths
low
high
tap
density,
interfacial
reaction,
regaining
attention
both
from
academia
industry.
In
this
review,
promises
micro‐Si
anodes
are
first
clarified
then
their
pain
points
presented
followed
summary
potential
remedies
such
carbon
encapsulation,
binder
design,
electrolyte
modifications
improved
mechanical
electrochemical
stability.
Finally,
toward
practical
future
batteries,
major
prospective
directions
discussed.
Carbon
coatings
desired
properties
combined
stable
solid
highlighted
along
significance
exploit
anodes.
Small,
Journal Year:
2023,
Volume and Issue:
19(30)
Published: April 8, 2023
Silicon
(Si)
anode
suffers
from
huge
volume
expansion
which
causes
poor
structural
stability
in
terms
of
electrode
material,
solid
electrolyte
interface,
and
electrode,
limiting
its
practical
application
high-energy-density
lithium-ion
batteries.
Rationally
designing
architectures
to
optimize
the
stress
distribution
Si/carbon
(Si/C)
composites
has
been
proven
be
effective
enhancing
their
cycling
stability,
but
this
remains
a
big
challenge.
Here,
metal-organic
frameworks
(ZIF-67)-derived
carbon
nanotube-reinforced
framework
is
employed
as
an
outer
protective
layer
encapsulate
inner
carbon-coated
Si
nanoparticles
(Si@C@CNTs),
features
dual
stress-buffering
enhance
Si/C
composite
prolong
lifetime.
Finite
element
simulation
proves
advantage
through
significantly
relieving
concentration
when
lithiation.
The
also
accelerates
charge
transfer
efficiency
during
charging/discharging
by
improvement
diffusion
electron
transport.
As
result,
Si@C@CNTs
exhibits
excellent
long-term
lifetime
good
rate
capability,
showing
specific
capacity
680
mAh
g-1
even
at
high
1
A
after
1000
cycles.
This
work
provides
insight
into
design
robust
for
optimization.
Advanced Materials,
Journal Year:
2023,
Volume and Issue:
35(29)
Published: April 8, 2023
The
poor
interfacial
stability
and
insufficient
cycling
performance
caused
by
undesirable
stress
hinder
the
commercial
application
of
silicon
microparticles
(µSi)
as
next-generation
anode
materials
for
high-energy-density
lithium-ion
batteries.
Herein,
a
conceptionally
novel
physicochemical
dual
cross-linking
conductive
polymeric
network
is
designed
combining
high
strength
toughness
coupling
stiffness
poly(acrylic
acid)
softness
carboxyl
nitrile
rubber,
which
includes
multiple
H-bonds,
introducing
highly
branched
tannic
acid
physical
cross-linker.
Such
design
enables
effective
dissipation
folded
molecular
chains
slipping
sequential
cleavage
thus
stabilizing
electrode
interface
enhancing
cycle
stability.
As
expected,
resultant
(µSi/PTBR)
delivers
an
unprecedented
capacity
retention
≈97%
from
2027.9
mAh
g-1
at
19th
to
1968.0
200th
2
A
.
Meanwhile,
this
unique
strategy
also
suitable
SiOx
anodes
with
much
lower
loss
≈0.012%
per
over
1000
cycles
1.5
Atomic
force
microscopy
analysis
finite
element
simulations
reveal
excellent
stress-distribution
ability
network.
This
work
provides
efficient
energy-dissipation
toward
practical
high-capacity
energy-dense
Interdisciplinary materials,
Journal Year:
2023,
Volume and Issue:
2(4), P. 635 - 663
Published: July 1, 2023
Abstract
Silicon
(Si)‐based
solid‐state
batteries
(Si‐SSBs)
are
attracting
tremendous
attention
because
of
their
high
energy
density
and
unprecedented
safety,
making
them
become
promising
candidates
for
next‐generation
storage
systems.
Nevertheless,
the
commercialization
Si‐SSBs
is
significantly
impeded
by
enormous
challenges
including
large
volume
variation,
severe
interfacial
problems,
elusive
fundamental
mechanisms,
unsatisfied
electrochemical
performance.
Besides,
some
unknown
processes
in
Si‐based
anode,
electrolytes
(SSEs),
anode/SSE
interfaces
still
needed
to
be
explored,
while
an
in‐depth
understanding
solid–solid
chemistry
insufficient
Si‐SSBs.
This
review
aims
summarize
current
scientific
technological
advances
insights
into
tackling
promote
deployment
First,
differences
between
various
conventional
liquid
electrolyte‐dominated
lithium‐ion
(LIBs)
with
discussed.
Subsequently,
mechanical
contact
model,
chemical
reaction
properties,
charge
transfer
kinetics
(mechanical–chemical
kinetics)
anode
three
different
SSEs
(inorganic
(oxides)
SSEs,
organic–inorganic
composite
inorganic
(sulfides)
SSEs)
systemically
reviewed,
respectively.
Moreover,
progress
SSE‐based
on
aspects
electrode
constitution,
three‐dimensional
structured
electrodes,
external
stack
pressure
highlighted,
Finally,
future
research
directions
prospects
development
proposed.
Advanced Energy Materials,
Journal Year:
2023,
Volume and Issue:
13(28)
Published: June 9, 2023
Abstract
State‐of‐the‐art
carbon
coatings
are
sought
to
protect
high‐capacity
silicon
anodes,
which
suffer
from
low
conductivity,
large
volume
change
and
fast
degradation.
However,
this
approach
falls
short
when
handling
physical–electrical
disconnections
between
shells
microparticulate
(SiMP)
with
drastic
size
variations.
Here,
a
strategy
of
covalent
coating
is
developed
establish
robust
encapsulation
structure.
The
obtained
SiC
bonds
enable
an
effectively
dynamic
connection
the
electrochemically
deforming
SiMP
sliding
graphene
layers,
preventing
evolution
gaps
shell
maintaining
persistent
electrical
connections
as
well
mechanical
toughness.
As
result
high
structure
reversibility,
cycling
stability
thick
anodes
greatly
improved,
up
areal
capacity
5.6
mAh
cm
−2
volumetric
2564
−3
.
This
interface
bonding
effect
demonstrates
great
potential
for
suppressing
deformation
involved
degradation
materials
through
strategies.