ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(46), P. 63628 - 63637
Published: Nov. 8, 2024
Electrolytes
play
a
crucial
role
in
enhancing
the
cycling
stability
and
overall
lifespan
of
lithium
metal
batteries
(LMBs).
However,
conventional
electrolytes
achieve
ununiform
low
ionic
conductivity
solid
electrolyte
interphase
(SEI),
leading
to
uncontrolled
dendrite
growth
dead
formation,
rendering
them
inadequate
for
meeting
performance
high
energy
density
LMBs.
Herein,
1,2-difluorobenzene
(1,2-dFBn)
is
introduced
as
antisolvent
fluorinated
which
composed
fluoroethylene
carbonate
(FEC)
bis(trifluoromethanesulfonyl)imide
(LiTFSI).
The
level
lowest
unoccupied
molecular
orbital
(LUMO)
fluorine-donating
ability
1,2-dFBn
jointly
modify
solvation
structure
electrode/electrolyte
chemistry.
As
result,
this
simple
formulation
enables
Li||Li
symmetric
cells
exhibit
remarkable
stability,
enduring
700
h
continuous
under
2
mA
cm–2
Li||Cu
cell
an
impressive
average
Coulombic
efficiency
(CE)
99.76%.
Moreover,
full
assembled
with
electrochemically
deposited
capacity
5
mAh
LiFePO4
(LFP)
cathode
achieves
exceptional
performance,
maintaining
discharge
specific
134.9
g–1
while
retaining
95.1%
at
2C
after
1000
cycles.
This
study
offers
plausible
ratio
design
electrolyte,
achieving
CE
long-life
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 5, 2025
Abstract
High‐voltage
sodium
metal
batteries
exhibit
excellent
advantages
in
low
cost
and
high
energy
density.
However,
the
poor
compatibility
of
traditional
electrolyte
with
(Na)
anode
high‐voltage
cathode
leads
to
interfacial
instability
potential
flammable
risks.
In
this
work,
a
nonflammable
is
developed
address
cycling
stability
4.7
V
battery
by
constructing
electrode–electrolyte
interphases
perchlorate
(NaClO
4
)
additive.
The
NaClO
additive
not
only
enables
efficient
Na
plating/stripping
an
average
Coulombic
efficiency
97.1%
Na||Cu
cells,
but
also
enhances
Na||Na
3
2
(PO
O
F
capacity
retention
97.9%
after
200
cycles.
superior
performance
attributed
ion‐conductivity
solid/cathode
interphases,
which
are
tuned
solvation
shell
.
Advanced Energy Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 24, 2025
Abstract
In
the
rapidly
evolving
global
landscape
of
renewable
energy
sources,
there
is
an
increasing
demand
for
high‐energy‐density
rechargeable
batteries
essential
storage.
Simultaneously,
a
growing
emphasis
on
developing
high‐stability
electrolytes.
The
concepts
high
concentration
electrolytes
(HCEs)
and
localized
(LHCEs)
have
emerged,
with
notable
progress
achieved
by
altering
cation‐solvent
cation–anion
solvation
coordination
environments.
However,
challenges
persist,
including
costs
low
ionic
conductivity.
A
recent
development
introduction
weakly
solvating
electrolyte
(WSE),
which
offers
new
perspective
design
stable
at
conventional
or
concentrations.
This
approach
enables
high‐performance
modulating
structure
to
generate
unique
anion‐driven
interphase
reaction
chemistry.
review
outlines
principles
WSEs
their
operating
mechanisms
when
applied
lithium
post‐lithium
batteries.
An
outlook
also
presented
future
research
directions
WSE,
coupled
analysis
technological
challenges.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 1, 2025
Great
electrochemical
stability
and
intrinsic
safety
are
of
critical
significance
in
realizing
large-scale
applications
Na-ion
batteries
(NIBs).
Unfortunately,
the
notorious
decomposition
electrolyte
undesirable
side
reactions
on
cathode-electrolyte
interphase
(CEI)
pose
major
obstacles
to
practical
implementation
NIBs.
Besides,
flammability
traditional
carbonate-based
electrolytes
raises
increasing
concerns
about
batteries.
Herein,
a
flame-retardant
all-fluorinated
is
proposed
achieve
an
anion-aggregated
inner
solvation
shell
by
modulating
cation-anion
interactions
through
low-coordination
number
cosolvent.
The
more
electrochemically
antioxidant
fluorinated
solvents
anion-dominated
interfacial
chemistry
contribute
construction
both
mechanically
chemically
stable
F-rich
CEI.
Such
thin,
homogeneous
effectively
inhibits
parasitic
reaction,
strengthens
stability,
enables
fast
Na+
diffusion
kinetics
interface.
When
employing
this
electrolyte,
Na0.95Ni0.4Fe0.15Mn0.3Ti0.15O2
(NFMT)
cathode
delivers
remarkable
discharge
capacity
up
169.7
mAh
g-1,
with
cycling
at
1C
for
500
cycles.
Impressively,
NFMT//hard
carbon
pouch
cells
such
also
steady
operation
100
cycles
0.5C
86.8%
remaining.
This
study
offers
reference
developing
high-performance
electrolytes.
