A Safe Ether Electrolyte Enabling High‐Rate Lithium Metal Batteries
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июнь 19, 2024
Abstract
High‐energy‐density
lithium
metal
batteries
(LMBs)
hold
enormous
potential
for
future
energy
storage
systems
but
are
plagued
by
poor
cycling
stability
and
safety
concerns,
especially
under
high‐rate
conditions.
The
addition
of
fluorinated
solvents
to
the
electrolyte
is
effective
in
enhancing
anode
(LMA)
improving
LMBs.
However,
extensive
introduction
not
conducive
transport
lithium‐ions
(Li
+
),
thereby
negatively
affecting
rate
performance
Herein,
a
safe
ether
(SEE)
designed
that
exhibits
both
high
Li
conductivity
nonflammability,
while
maintaining
compatibility
with
LMA.
Li–LiNi
0.8
Mn
0.1
Co
O
2
(NMC811)
cells
utilizing
SEE
can
demonstrate
remarkable
electrochemical
performance,
delivering
discharge
capacity
113.1
mAh
g⁻¹
at
rates
as
30
C
90%
their
initial
over
300
cycles
10
C.
Moreover,
practical
Li‐NCM811
full
cell
assembled
achieves
stable
3
Язык: Английский
Achieving High Stability and Capacity in Micron‐Sized Conversion‐Type Iron Fluoride Li‐Metal Batteries
Advanced Science,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 23, 2024
Abstract
Iron
fluoride,
a
conversion‐type
cathode
material
with
high
energy
density
and
low‐cost
iron,
holds
promise
for
Li‐ion
batteries
but
faces
challenges
in
synthesis,
conductivity,
cycling
stability.
This
study
addresses
these
issues
by
synthesizing
micron‐sized
iron‐fluoride
using
simple
solid‐state
synthesis.
Despite
large
particle
size,
capacity
of
571
mAh
g
−1
is
achieved,
which
attributed
to
the
unique
surface
internal
pores
within
particles,
provided
area.
first
demonstrate
feasibility
iron
fluoride
particles
enhance
electrode
achieve
an
full
cell
capacity.
Also,
cause
fading
investigated.
Electrode
delamination
from
current
collector,
main
early
cycles,
resolved
carbon‐coated
aluminum
(C/Al)
collector.
Moreover,
(Fe)
dissolution
deposition
dissolved
Fe
on
Li
metal
also
contributed
significantly
degradation.
Localized
high‐concentration
electrolytes
(LHCEs)
suppress
dendrite
growth,
resulting
long‐cycle
stability
300
cycles.
provides
insights
into
further
development
fluorides
across
various
compositions.
Язык: Английский
Insights into the selection of Si O bond containing electrolyte additives for Si-based lithium-ion batteries
Journal of Energy Storage,
Год журнала:
2025,
Номер
114, С. 115943 - 115943
Опубликована: Фев. 22, 2025
Язык: Английский
Dynamic Cycling of Ultrathin Li Metal Anode via Electrode–Electrolyte Interphase Comprising Lithiophilic Ag and Abundant LiF under Carbonate‐Based Electrolyte
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 12, 2025
Abstract
The
use
of
ultrathin
lithium
(Li)
metal
anode
in
Li
batteries
(LMBs)
has
the
potential
to
significantly
improve
energy
density
comparison
conventional
LMBs.
However,
they
possess
several
challenges
such
as
intrinsic
dendrite
growth
and
dead
Li,
leading
poor
cyclability
coulombic
efficiency
(CE).
In
addition,
can
cause
much
faster
degradation
performances
than
thicker
one
owing
exhaustion
resource
with
less
compensation.
To
address
these
problems,
silver
trifluoromethanesulfonate
(AgCF
3
SO
,
AgTFMS)
is
proposed
a
functional
electrolyte
additive
carbonate‐based
buffer
dendritic
provide
enhanced
cyclability.
Interestingly,
Ag
derived
from
AgTFMS
exhibits
lithiophilic
properties
through
an
alloying
reaction
Li.
Furthermore,
CF
group
generates
physically
stable
LiF‐rich
solid‐electrolyte
interphase
(SEI),
which
further
suppresses
growth.
An
LiNi
0.8
Mn
0.1
Co
O
2
(NMC811)
full‐cell
comprising
(20
µm)
reveals
excellent
capacity
retention
up
88.2%
over
200
cycles,
well
outstanding
rate
capability
under
harsh
practical
condition.
As
result,
pave
new
dimension
for
design
high
LMBs
using
anode.
Язык: Английский
Ionic-conductive poly (vinylidene fluoride) polymer as a versatile binder to stabilize high-voltage LiCoO2 cathode materials
Journal of Electroceramics,
Год журнала:
2024,
Номер
52(4), С. 303 - 313
Опубликована: Сен. 27, 2024
Язык: Английский
Built‐In Electric Field Induced Uniform Li Deposition via Construction of CoP/Co2P Heterojunction in 3D Carbon Nanofiber Networks
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 19, 2024
Abstract
Uncontrollable
dendrite
growth
significantly
hinders
the
application
of
Li
metal
anodes.
To
improve
uniformity
deposition,
it
is
essential
to
develop
an
inorganic‐rich
solid‐electrolyte
interphase
(SEI)
and
lithiophilic
host
surface.
However,
there
exists
a
big
challenge
in
simultaneously
optimizing
SEI
anode
Herein,
cobalt
phosphide/dicobalt
phosphide
(CoP/Co
2
P)
pp‐heterojunction
modified
carbon
nanofiber
networks
(CNF‐CoP
x
)
are
successfully
prepared
as
3D
host,
which
can
form
built‐in
electric
field
(BIEF)
accelerate
conversion
reaction
kinetics
CoP
into
3
P,
spontaneously
derive
new
BIEF
induced
by
Co/Co
P
Schottky
heterojunction
facilitates
electron
transfer
during
deposition
process.
Consequently,
CNF‐CoP
@Li
symmetric
cell
exhibits
impressive
long‐term
cycling
stability,
maintaining
low
polarization
for
up
600
h
at
current
density
mA
cm
−2
.
Additionally,
@Li||LiFePO
4
full
delivers
high‐capacity
retention
89.5%
over
500
cycles
1
C.
Язык: Английский