Angewandte Chemie,
Год журнала:
2024,
Номер
137(1)
Опубликована: Окт. 2, 2024
Abstract
Contact
prelithiation
is
widely
used
to
compensate
for
the
initial
capacity
loss
of
lithium‐ion
batteries
(LIBs).
However,
low
utilization
Li
source,
which
suffers
from
deteriorated
contact
interfaces,
results
in
cycling
degeneration.
Herein,
Li−Ag
alloy‐based
artificial
electron
channels
(AECs)
are
established
source/graphite
anode
interfaces
promote
Li‐source
conversion.
Due
shielding
effect
alloy
(50
at
.
%
Li)
on
Li‐ion
diffusion,
dry‐state
interfacial
corrosion
restricted.
The
unblocked
electronic
conduction
across
AEC‐involved
interface
not
only
facilitates
conversion
but
also
accelerates
kinetics
during
wet‐state
process,
resulting
an
ultrahigh
(90.7
%).
Implementing
AEC‐assisted
a
LiNi
0.5
Co
0.2
Mn
0.3
O
2
pouch
cell
yields
35.8
increase
energy
density
and
stable
over
600
cycles.
This
finding
affords
significant
insights
into
construction
efficient
technology
development
high‐energy
LIBs.
The
practical
application
of
Li
metal
anodes
has
been
hindered
by
severely
irreversible
side
reactions
for
low
Coulombic
efficiency,
uncontrollable
growth
dendrites,
and
large
volume
change.
Herein,
we
report
subnanopore-rich
carbon
spheres
encapsulated
with
Sn
single
atoms
(Sn/CS@SC)
as
a
host
to
address
these
challenges.
Owing
the
high
affinity
atoms,
Sn/CS@SC
can
promote
storage
quasi-metallic
within
inner
void
space
other
than
direct
plating
metallic
on
outer
surface.
Moreover,
subnanopores
strong
spatial
confinement
effect
prevent
penetration
ester
electrolyte
reduced
reactions.
As
expected,
demonstrates
efficiency
99.8%
over
600
cycles.
full
cell
using
prelithiated
anode
LiNi0.8Co0.1Mn0.1O2
cathode
shows
capacity
retention
(~80%)
500
cycles
at
current
density.
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 7, 2025
Abstract
The
advancement
of
lithium
metal
batteries
toward
their
theoretical
energy
density
potential
remains
constrained
by
safety
and
performance
issues
inherent
to
liquid
electrolytes.
Quasi‐solid‐state
electrolytes
(QSSEs)
based
on
poly‐1,3‐dioxolane
(poly‐DOL)
represent
a
promising
development,
yet
challenges
in
achieving
satisfactory
Coulombic
efficiency
long‐term
stability
have
impeded
practical
implementation.
While
nitrate
addition
can
enhance
efficiency,
its
incorporation
results
prohibitively
slow
polymerization
rates
spanning
several
months.
In
this
work,
high‐polymerization‐enthalpy
1,1,1‐trifluoro‐2,3‐epoxypropane
is
introduced
as
co‐polymerization
promoter,
successfully
integrating
into
poly‐DOL‐based
QSSEs.
resulting
electrolyte
demonstrates
exceptional
with
2.23
mS
cm
−1
ionic
conductivity
at
25
°C,
99.34%
Li|Cu
cells,
stable
interfaces
sustained
through
1300
h
symmetric
cell
cycling.
This
approach
also
suppresses
poly‐DOL
crystallization,
enabling
Li|LiFePO
4
cells
maintain
beyond
2000
cycles
1C.
Scale‐up
validation
≈1
Ah
Li|NCM811
pouch
achieves
94.4%
capacity
retention
over
60
cycles.
strategy
establishes
new
pathway
for
developing
high‐performance,
situ
polymerized
quasi‐solid‐state
storage
applications.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(30), С. 39215 - 39224
Опубликована: Июль 22, 2024
Li
dendrite
and
the
shuttle
effect
are
two
primary
hindrances
to
commercial
application
of
lithium-sulfur
batteries
(LSBs).
Here,
a
multifunctional
separator
has
been
fabricated
via
successively
coating
carbon
nanotubes
(CNTs)
lithium
phytate
(LP)
onto
polypropylene
(PP)
improve
performance
LSBs.
The
LP
layer
with
abundant
electronegative
phosphate
group
as
permselective
ion
sieve
not
only
reduces
polysulfide
but
also
facilitates
uniform
Li+
flux
through
PP
separator.
And
highly
conductive
CNTs
on
second
act
collector
accelerate
reversible
conversion
sulfide
species.
synergistic
further
increases
electrolyte
wettability
reaction
kinetics
cells
modified
suppresses
growth
dendrite.
Consequently,
LSBs
present
much
enhanced
rate
cyclic
performance.
It
is
expected
that
this
study
may
generate
an
executable
tactic
for
interface
engineering
industrial
process
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
64(1)
Опубликована: Окт. 2, 2024
Contact
prelithiation
is
widely
used
to
compensate
for
the
initial
capacity
loss
of
lithium-ion
batteries
(LIBs).
However,
low
utilization
Li
source,
which
suffers
from
deteriorated
contact
interfaces,
results
in
cycling
degeneration.
Herein,
Li-Ag
alloy-based
artificial
electron
channels
(AECs)
are
established
source/graphite
anode
interfaces
promote
Li-source
conversion.
Due
shielding
effect
alloy
(50
at.
%
Li)
on
Li-ion
diffusion,
dry-state
interfacial
corrosion
restricted.
The
unblocked
electronic
conduction
across
AEC-involved
interface
not
only
facilitates
conversion
but
also
accelerates
kinetics
during
wet-state
process,
resulting
an
ultrahigh
(90.7
%).
Implementing
AEC-assisted
a
LiNi
Lithium
nitrate
(LiNO3)
stands
as
an
effective
electrolyte
additive,
mitigating
the
degradation
of
Li
metal
anodes
by
forming
a
Li3N-rich
solid
interphase
(SEI).
However,
its
conversion
kinetics
are
impeded
energy-consuming
eight-electron
transfer
reactions.
Herein,
isoreticular
metal-organic
framework-8-derived
carbon
is
incorporated
into
cloth
(RMCC)
catalytic
current
collector
to
regulate
LiNO3
and
boost
Li3N
generation
inside
SEI.
Our
findings
reveal
that
reducing
LiNO
during
transformation
occurs
more
favorably
on
RMCC
than
conventional
substrates.
The
robust
electrostatic
attraction
between
vacancy
defects
in
renders
chemical
bonds
intermediate
susceptible
cracking.
Consequently,
RMCC-derived
SEI
exhibits
dendrite
restriction;
symmetric
LiFePO4
full
cells
with
prelithiated
demonstrate
improved
cycling
stability
without
short-circuiting,
outperforming
their
counterparts.
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 22, 2025
Abstract
With
higher
energy
density
and
reduced
cost,
anode‐free
battery
has
attracted
great
attention
from
both
academic
industry.
However,
the
development
of
batteries
is
hindered
by
their
poor
cycle
life
due
to
continuous
irreversible
lithium
(Li)
consumption
at
anode
side.
Here,
a
surface‐functionalized
alloy
foil,
which
can
gradually
release
active
cell
upon
cycling,
used
as
collector
for
proposed.
The
foil
prestored
with
certain
amount
via
simple
wet
contacting
reaction
between
metal
liquid
source
reagent.
be
precisely
controlled
reagent
concentration
contact
time.
When
anode,
its
alloyed
surface
demonstrates
low
nucleation
barrier
deposition
more
uniform
behavior.
More
importantly,
rationally
sustainably
compensate
Li
cycling
full
cell,
thus
greatly
prolonging
10
times.
Besides,
this
technique
extended
diverse
collectors
demonstrating
broad
applicability.
