Lithium
(Li)
metal
has
become
a
research
hotspot
for
anodes
materials
due
to
its
ultra-high
theoretical
capacity
and
the
lowest
redox
potential.
However,
practical
application
of
Li
batteries
is
hampered
by
formation
uncontrollable
dendrites
irreversible
structural
changes
during
long-term
charge/discharge
process.
Developing
stable
anode
with
uniform
deposition
highly
desirable.
Herein,
surface
fluorination
nickel
nanowires
enabling
LiF-rich
nanoscale
solid
electrolyte
interface
was
demonstrated
anodes.
Free-standing
three-dimensional
(3D)
(NiNWs)
current
collector
decorated
lithiophilic
NiF2
nanosheets
(NiNWs@NiF2)
constructed
via
simple
scalable
strategy.
Theoretical
experimental
analysis
confirmed
that
could
reduce
nucleation
barrier,
facilitating
ion
deposition.
The
3D
conductive
NiNWs
network
enabled
fast
electron
transfer
mitigated
volume
cycling.
Additionally,
(SEI)
layer
formed
between
significantly
improved
interfacial
stability.
As
result,
as-assembled
Li-NiNWs@NiF2
symmetrical
cell
provides
superior
electrochemical
performance,
maintaining
stability
2500
h
at
1.0
mA
cm-2
900
5.0
cm-2.
Furthermore,
assembled
Li-NiNWs@NiF2||
LiFePO4
(LFP)
full
exceptional
retention
93.9%
after
2000
cycles
rate
5
C.
Overall,
unique
structure
NiNWs@NiF2
not
only
offers
straightforward
method
designing
host,
but
also
introduces
concept
engineering
through
creation
an
artificial
SEI
layer.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 30, 2024
Abstract
Localized
deposition
behavior
tends
to
induce
the
growth
of
lithium
dendrite
and
hinder
full
utilization
storage
space,
significantly
impeding
practical
application
3D
conductive
hosts.
Here,
a
novel
synchronous
mode
is
proposed
for
first
time
through
hierarchical
structure
design
Li
host.
The
top‐down
gradually
enhanced
lithiophilicity
conductivity
scaffold
provide
sufficient
driving
force
+
migrate
downward,
promoting
within
entire
space
Notably,
has
been
theoretically
experimentally
validated
finite
element
simulation
in
situ
optical
microscopy,
respectively.
meticulously
designed
strategy
not
only
maximizes
but
also
prevents
formation
dendrites
under
high
current
rate.
Consequently,
symmetric
Li//Li
cell
exhibits
long‐term
cycling
lifespan
over
3700
h
with
low
overpotential
15.6
mV,
together
Coulombic
efficiency
as
99.5%
300
cycles
at
3
mA
cm
−2
.
paired
LiFePO
4
cathode
demonstrates
1000
capacity
retention
rate
91.6%.
opens
up
new
paradigm
construction
hosts
dendrite‐free
metal
anode.
ACS Applied Energy Materials,
Journal Year:
2024,
Volume and Issue:
7(24), P. 12084 - 12091
Published: Dec. 12, 2024
Lithium
(Li)
metal
batteries
(LMBs)
are
some
of
the
most
promising
high
energy
density
to
meet
demands
electric
transportation.
However,
practical
applications
LMBs
hindered
by
short
cycle
life
and
safety
concerns,
mainly
associated
with
side
reactions
between
Li
anode
liquid
electrolyte
growth
dendrites
during
cycling.
In
this
study,
we
develop
a
stable
artificial
solid
interphase
(aSEI)
layer,
which
consists
surface-treated
(ST)
PEO–Li6.4Ga0.2La3Zr2O12
composite
polymer
coating
layer
(CPL)
on
anode.
The
developed
aSEI
is
against
selected
enables
uniform
electrodeposition
Li.
Therefore,
STCPL@Li||LiNi0.8Mn0.1Co0.1O2
(NMC811)
cells
exhibit
improved
cycling
stability
compared
bare
Li||NMC811
at
moderate
current
densities.
Notably,
using
50
μm-thick
NMC811
cathode
(∼4.8
mAh
cm–2),
capacity
retention
85%
obtained
for
STCPL@Li||NMC811
2.4
mA
cm–2
after
300
cycles
24%
cells.
Furthermore,
demonstrate
higher
capacities
charge
densities
2.4,
4.8,
7.2
These
findings
suggest
that
STCPL
LMBs.
Lithium
(Li)
metal
has
become
a
research
hotspot
for
anodes
materials
due
to
its
ultra-high
theoretical
capacity
and
the
lowest
redox
potential.
However,
practical
application
of
Li
batteries
is
hampered
by
formation
uncontrollable
dendrites
irreversible
structural
changes
during
long-term
charge/discharge
process.
Developing
stable
anode
with
uniform
deposition
highly
desirable.
Herein,
surface
fluorination
nickel
nanowires
enabling
LiF-rich
nanoscale
solid
electrolyte
interface
was
demonstrated
anodes.
Free-standing
three-dimensional
(3D)
(NiNWs)
current
collector
decorated
lithiophilic
NiF2
nanosheets
(NiNWs@NiF2)
constructed
via
simple
scalable
strategy.
Theoretical
experimental
analysis
confirmed
that
could
reduce
nucleation
barrier,
facilitating
ion
deposition.
The
3D
conductive
NiNWs
network
enabled
fast
electron
transfer
mitigated
volume
cycling.
Additionally,
(SEI)
layer
formed
between
significantly
improved
interfacial
stability.
As
result,
as-assembled
Li-NiNWs@NiF2
symmetrical
cell
provides
superior
electrochemical
performance,
maintaining
stability
2500
h
at
1.0
mA
cm-2
900
5.0
cm-2.
Furthermore,
assembled
Li-NiNWs@NiF2||
LiFePO4
(LFP)
full
exceptional
retention
93.9%
after
2000
cycles
rate
5
C.
Overall,
unique
structure
NiNWs@NiF2
not
only
offers
straightforward
method
designing
host,
but
also
introduces
concept
engineering
through
creation
an
artificial
SEI
layer.
