Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 20, 2024
Abstract
Among
optimization
strategies
for
solving
the
poor
ion
transport
ability
and
electrolyte/electrode
interface
compatibility
problems
of
lithium
(Li)‐based
batteries,
halogen
elements,
such
as
fluorine
(F)
iodine
(I),
have
gradually
occupied
an
important
position
because
their
superb
electronegativity,
oxidizability,
ionic
radius,
other
properties.
The
study
commences
by
outlining
shared
mechanism
which
F
I
enhance
solid‐state
metal
batteries'
electrochemical
performance.
In
particular,
can
considerably
improve
capacity
through
chemical
means
intermolecular
interactions
halogenation
reactions.
Furthermore,
utilization
significantly
enhances
stability
via
physical
strategies,
encompassing
doping
techniques,
application
surface
coatings,
fabrication
synthetic
intermediate
layers.
Subsequently,
characteristics
used
in
Li‐based
batteries
are
elaborated
detail,
focusing
on
fact
that
provide
additional
energy
density
anode
material
but
different
mechanisms.
Additionally,
activate
dead
at
negative
electrode,
act
a
new
carrier.
Finally,
rational
concept
synergistic
effect
is
proposed
feasibility
F–I
bihalide
solid
electrolytes
explored.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Окт. 23, 2024
Polyethylene
oxide
(PEO)
based
electrolytes
critically
govern
the
security
and
energy
density
of
solid-state
batteries,
but
typically
suffer
from
poor
oxidation
resistance
at
high
voltages,
which
limits
batteries.
Here,
we
report
a
Lewis-acid
coordinated
strategy
to
significantly
improve
cyclic
stability
4.8
V-class
PEO-based
battery.
The
introduced
Mg
Abstract
While
the
formation
of
an
inorganic‐rich
solid
electrolyte
interphase
(SEI)
plays
a
crucial
role,
persistent
challenge
lies
in
organic‐rich
SEI
due
to
high
solvent
ratio
low‐concentration
electrolytes
(LCEs),
which
hinders
achievement
high‐performance
lithium
metal
batteries.
Herein,
by
incorporating
di
‐fluoroethylene
carbonate
(DFEC)
as
non‐solvating
cosolvent,
solvation
structure
dominated
anions
is
introduced
innovative
LCE,
leading
creation
durable
and
stable
SEI.
Leveraging
this
design,
Li||NCM83
cell
demonstrates
exceptional
cycling
stability,
maintaining
82.85%
its
capacity
over
500
cycles
at
1
C.
Additionally,
with
low
N/P
(≈2.57)
reduced
volume
(30
µL)
retain
87.58%
after
150
0.5
Direct
molecular
information
utilized
reveal
strong
correlation
between
structures
reduction
sequences,
proving
anion‐dominate
can
impedes
preferential
solvents
constructs
These
findings
shed
light
on
pivotal
role
dictating
composition
battery
performance,
offering
valuable
insights
for
design
advanced
next‐generation
The
poor
ambient
ionic
transport
properties
of
poly(ethylene
oxide)
(PEO)-based
SPEs
can
be
greatly
improved
through
filler
introduction.
Metal
fluorides
are
effective
in
promoting
the
dissociation
lithium
salts
via
establishment
Li-F
bond.
However,
too
strong
interaction
would
impair
fast
migration
ions.
Herein,
magnesium
aluminum
fluoride
(MAF)
fillers
developed.
Experimental
and
simulation
results
reveal
that
bond
strength
could
readily
altered
by
changing
fluorine
vacancy
(V
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 4, 2025
Abstract
Vitrified
metal–organic
frameworks
(MOFs)
are
promising
solid‐state
electrolytes
for
lithium
metal
batteries
due
to
their
unique
structures.
Nevertheless,
the
effect
of
distorted
molecular
structures
in
glassy
MOFs
on
Li
+
migration
behavior
at
level
remains
largely
unexplored,
posing
a
huge
obstacle
further
boosting
electrochemical
performances.
Herein,
conduction
ZIF‐62
quasi‐solid‐state
electrolyte
(GZ‐62‐QSSE)
is
molecularly
elucidated,
which
accomplished
by
continuous
delivery
N
sites
imidazole
and
benzimidazole
ligands
like
process
relay
race.
Such
fast
GZ‐62‐QSSE
demonstrates
more
than
1.5‐time
increase
transference
number
helps
generate
inorganic‐dominated
cathode/anode
interphases
unblocked
ion
transport
compared
with
crystalline
electrolyte.
Consequently,
long‐term
stability
remarkable
high‐rate
capability
realized
proof‐of‐the‐concept
full
cells,
represents
one
best
values
among
all
reported
MOF‐based
batteries.
For
example,
LiFePO
4
||Li
cells
employing
brilliantly
undergo
3000
cycles
high
initial
capacity
132.1
mAh
g
−1
ultralow
decay
rate
0.009%
1
C.
Full
still
display
discharge
83.6
5
The
elaborated
high‐performance
offers
new
insights
exploiting
advanced
propels
development
