Inorganic Chemistry,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 19, 2024
Lithium
metal
anodes
generally
suffer
from
uncontrolled
dendrite
growth
and
large
volume
change,
while
traditional
skeletons
such
as
Li13In3
Li22Sn5
are
too
heavy
discontinuous
to
offer
highly
efficient
structural
supportability
for
composite
Li
anodes.
In
this
work,
lightweight
stable
fiber-clustered
skeletons,
which
composed
of
LiB
fibers
jointed
Li22Si5
nanoparticles,
can
be
obtained
by
smelting
SiB6
powder
ingots.
addition
serving
both
ionic
electronic
conductors
anodes,
the
reduced
volumetric
fluctuation
offering
uniform,
heterogeneous,
continuous
architectures
suppressing
lithium
dendrites
with
low
nucleation
overpotential
diffusion
energy
barrier.
As
a
result,
Li–SiB6|Li–SiB6
symmetrical
cells
achieve
an
ultralong
lifespan
over
2000
h
cycling
at
1
mA
cm–2
cm–2.
Eventually,
Li–SiB6|LiFePO4
full
exhibit
long-term
cyclability
400
cycles
high-capacity
retention
94.5%
2
C,
Li–SiB6|LiCoO2
pouch
impressive
85%
capacity
after
350
cycles.
This
work
develops
new
strategy
strengthen
stability
fibrous
minimize
changes
dendrite-free
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(28)
Published: March 28, 2024
Abstract
Lithium‐metal
anodes
with
excellent
theoretical
specific
capacities
(3680
mAh
g
−1
)
have
attracted
considerable
attention
for
overcoming
the
capacity
bottleneck
of
conventional
graphite
anodes.
However,
they
often
suffer
from
uncontrolled
dendrite
growth
and
undesirable
side
reactions,
considerably
limiting
their
practical
application
in
lithium‐metal
batteries.
In
this
study,
urchin‐like
silver@copper
oxide
(Ag@CuO)
heterostructures
gradient
electrical
conductivity
lithiophilicity
are
prepared
using
a
facile
liquid‐phase
reduction
method.
The
unique
amphiphilic
lithium
mechanism
alloying
conversion
reactions
effectively
reduces
nucleation
overpotential
metal
anode
promotes
uniform
deposition
process.
Meanwhile,
situ‐generated
Li
2
O‐rich
solid
electrolyte
interphase
(SEI)
film
can
further
induce
reversible
plating/stripping.
All
these
characteristics
endow
Ag@CuO
high
Coulombic
efficiency
98.89%,
even
after
1200
cycles,
long
cycle
life
2800
h
at
current
density
0.2
mA
cm
−2
,
thus
demonstrating
that
such
modified
exhibit
superior
compatibility
major
commercial
cathode
materials,
as
LiCoO
(LCO)
LiNi
0.8
Co
0.1
Mn
O
(NCM‐811).
Hence,
study
provides
an
effective
strategy
developing
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: May 13, 2024
Abstract
LiB
alloy
is
promising
lithium
(Li)
metal
anode
material
because
the
continuous
internal
fiber
skeleton
can
effectively
suppress
Li
dendrites
and
structural
pulverization.
However,
unvalued
surface
states
limit
practical
application
of
anodes.
Herein,
study
examined
influence
different
exposure
manners
owing
to
various
on
electrochemical
performance
targetedly
proposed
a
scalable
friction
coating
strategy
construct
lithiated
fumed
silica
(LFS)
functional
layer
with
abundant
electrochemically
active
sites
anode.
The
LFS
significantly
suppresses
inhomogeneous
interfacial
behavior
enables
in
homogeneously
planar
manner
(LFS‐LiB).
Thus,
0.5
Ah
LFS‐LiB||LiCoO
2
(LCO)
pouch
cell
exhibits
discharge
capacity
retention
rate
80%
after
388
cycles.
Moreover,
6.15
LFS‐LiB||S
409.3
Wh
kg
−1
30
In
conclusion,
findings
provide
new
research
perspective
for
Small,
Journal Year:
2024,
Volume and Issue:
20(35)
Published: May 9, 2024
The
increasing
need
for
energy
storage
devices
with
high
density
has
led
to
significant
interest
in
Li-metal
batteries
(LMBs).
However,
the
use
of
commercial
electrolytes
LMBs
is
problematic
due
their
flammability,
inadequate
performance
at
low
temperatures,
and
tendency
promote
growth
lithium
dendrites
other
flaws.
This
study
introduces
a
localized
high-concentration
electrolyte
(LHCE)
that
addresses
these
issues
by
employing
non-flammable
components
incorporating
carefully
designed
additives
enhance
flame
retardancy
low-temperature
performance.
By
optimize
electrolyte,
it
possible
attain
inorganic-dominated
solid
interphases
on
both
cathode
anode.
achievement
results
uniform
deposition
lithium,
as
well
suppression
decomposition
deterioration.
Consequently,
this
LHCE
achieve
over
300
stable
cycles
LiNi
Journal of Magnesium and Alloys,
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 1, 2024
Lithium
metal
is
considered
as
the
most
promising
anode
material
for
next
generation
of
secondary
batteries
due
to
its
high
theoretical
specific
capacity
and
low
potential.
However,
undesirable
parasitic
reactions,
poor
cycling
stability
safety
concerns
could
be
caused
by
uncontrolled
dendrite
reactivity
Li
metal,
which
hinder
practical
application
Li-metal
in
high-energy
rechargeable
(LMBs).
Here,
a
facile
way
reported
stabilize
building
lithiophilic
Mg-Li-Cu
alloy.
Due
delocalization
electrons
on
deposited
lithium
enhanced
Cu
self-diffusion
into
Mg-Li
alloy,
growth
dendrites
inhibited
Moreover,
reactions
with
electrolyte
avoided
alloy
anode.
It
noteworthy
that
symmetric
battery
life
electrodes
exceeds
9000
h
at
1
mA
cm−2
mAh
cm−2.
The
full
cell
(LiFePO4
||
Mg-Li-Cu)
exhibits
148.2
g−1,
retention
96.4%,
C
after
500
cycles.
This
work
not
only
pave
flexible
highly
stable
LMBs,
but
also
provides
novel
strategies
preparation
optimization
Mg
