Abstract
Composite
polymer‐ceramic
electrolytes
have
shown
considerable
potential
for
high‐energy‐density
Li‐metal
batteries
as
they
combine
the
benefits
of
both
polymers
and
ceramics.
However,
low
ionic
conductivity
poor
contact
with
electrodes
limit
their
practical
usage.
In
this
study,
a
highly
conductive
stable
composite
electrolyte
high
ceramic
loading
is
developed
batteries.
The
electrolyte,
produced
through
in
situ
polymerization
composed
polymer
called
poly‐1,3‐dioxolane
poly(vinylidene
fluoride)/ceramic
matrix,
exhibits
excellent
room‐temperature
1.2
mS
cm
−1
stability
Li
metal
over
1500
h.
When
tested
Li|electrolyte|LiFePO
4
battery,
delivers
cycling
performance
rate
capability
at
room
temperature,
discharge
capacity
137
mAh
g
500
cycles
1
C.
Furthermore,
not
only
+
transference
number
0.76
but
also
significantly
lowers
resistance
(from
157.8
to
2.1
Ω)
relative
electrodes.
used
battery
high‐voltage
LiNi
0.8
Mn
0.1
Co
O
2
cathode,
140
achieved.
These
results
show
solid‐state
provide
strategy
designing
polymer‐in‐ceramic
electrode‐compatible
interfaces.
ACS Applied Materials & Interfaces,
Год журнала:
2021,
Номер
13(39), С. 47163 - 47173
Опубликована: Сен. 24, 2021
Solid
polymer
electrolytes
(SPEs)
of
superior
ionic
conductivity,
long-term
cycling
stability,
and
good
interface
compatibility
are
regarded
as
promising
candidates
to
enable
the
practical
applications
solid
lithium
metal
batteries
(SLMBs).
Here,
a
mixed-matrix
SPE
(MMSE)
with
incorporated
metal–organic
frameworks
(MOFs)
liquid
is
prepared.
The
dissociation
Li
salt
in
MMSE
can
be
promoted
effectively
due
introduction
MOF
via
Fourier-transform
infrared
spectroscopy
(FT-IR)
analysis,
density
functional
theory
calculation,
molecular
dynamics
simulation.
as-formed
exhibits
an
ultralow
thickness
20
μm
satisfactory
conductivity
lithium-ion
transference
number
(1.1
mS
cm–1
at
30
°C,
0.72).
optimized
SLMBs
high-voltage
LiMn0.75Fe0.25PO4
(LMFP)
exhibit
excellent
cyclability
4.2
V
under
room
temperature.
Moreover,
Li/MMSE/LiFePO4
cells
have
desirable
cycle
performance
from
−20
100
their
capacity
remains
143.3
mA
h
g–1
after
being
cycled
300
times
10
C
°C.
Li/LiFePO4
pouch
also
show
safety
extreme
conditions.
symmetric
work
steadily
even
supreme
current
4
cm–2
From
above
these
MMSEs
present
new
opportunities
for
development
electrochemical
properties.
Abstract
Composite
polymer‐ceramic
electrolytes
have
shown
considerable
potential
for
high‐energy‐density
Li‐metal
batteries
as
they
combine
the
benefits
of
both
polymers
and
ceramics.
However,
low
ionic
conductivity
poor
contact
with
electrodes
limit
their
practical
usage.
In
this
study,
a
highly
conductive
stable
composite
electrolyte
high
ceramic
loading
is
developed
batteries.
The
electrolyte,
produced
through
in
situ
polymerization
composed
polymer
called
poly‐1,3‐dioxolane
poly(vinylidene
fluoride)/ceramic
matrix,
exhibits
excellent
room‐temperature
1.2
mS
cm
−1
stability
Li
metal
over
1500
h.
When
tested
Li|electrolyte|LiFePO
4
battery,
delivers
cycling
performance
rate
capability
at
room
temperature,
discharge
capacity
137
mAh
g
500
cycles
1
C.
Furthermore,
not
only
+
transference
number
0.76
but
also
significantly
lowers
resistance
(from
157.8
to
2.1
Ω)
relative
electrodes.
used
battery
high‐voltage
LiNi
0.8
Mn
0.1
Co
O
2
cathode,
140
achieved.
These
results
show
solid‐state
provide
strategy
designing
polymer‐in‐ceramic
electrode‐compatible
interfaces.
