Advanced Sustainable Systems,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 15, 2024
Abstract
Although
Li
metal
is
considered
the
most
promising
anode
material
owing
to
its
high
theoretical
capacity,
there
are
numerous
restrictions
on
expanding
application
because
of
undesired
surface
reactions
occurring
at
anode.
To
solve
this,
an
effective
electrolyte
combination
consisting
1,1‐diethoxyethane
(DEE)
and
lithium
bis(fluorosulfonyl)imide
(LiFSI)
used
in
this
work,
which
can
provide
organic/inorganic‐hybridized
solid‐electrolyte
interphase
(SEI)
The
DEE
solvent
affords
flexible
carbon‐abundant
components,
whereas
LiFSI
offers
mechanically
rigid
fluoride‐type
components;
these
undergo
electrochemical
reduction
form
SEI
layers
that
balanced
terms
organic
inorganic
components.
Systematic
analysis
results
exhibit
when
layer
integrated
with
embedded
anode,
decomposition,
dendritic
growth
suppressed
Li/Li
cells,
thereby
improving
stability.
Similarly,
it
provides
stable
cycle
life
characteristics
even
150
cycles
Li/S
cells
(72.0%
vs
52.6%).
2D
Silicon
(Si)
based
materials
are
promising
high-rate
anode
candidates
due
to
the
short
Li+
diffusion
pathways
and
uniform
stress
distribution
during
lithiation.
However,
complex
preparation
process,
high
cost,
side
reactions
triggered
by
large
specific
surface
area
limit
its
application.
Herein,
a
one-step
method
is
developed
synthesize
Si
nanosheets
from
abundant
layered
silicate
mineral
montmorillonite
(MMT),
via
salt-assisted
magnesiothermic
reduction.
Then,
through
spray
granulation
high-temperature
pyrolysis,
high-sphericity
Si/C
composite
(C-SiNS)
finally
prepared.
The
internal
structure
of
C-SiNS
consists
stacked
with
carbon
shell
formed
PVP
on
surface.
customized
promotes
rate,
effectively
alleviates
volume
expansion,
minimizes
reactions.
Benefiting
robust
structural
design,
demonstrates
excellent
rate
performance
(509.78
mAh·g-1
at
20
A·g-1)
outstanding
long-term
cycling
stability
(606.80
after
500
cycles
2
A·g-1).
feasibility
practical
application
validated
lithium-ion
full
batteries
assembled
commercial
LiFePO4
cathodes
(106
250
0.2
C).
work
presents
an
efficient
synthesis
strategy
for
also
provides
high-value
utilization
potential
options
MMT.
The Journal of Physical Chemistry Letters,
Год журнала:
2025,
Номер
unknown, С. 4155 - 4161
Опубликована: Апрель 18, 2025
In
lithium-ion
batteries
(LIBs)
used
for
deep-space
exploration,
LiCoO2
cathode
materials
face
significant
challenges
in
high-radiation
environments,
including
structural
degradation
and
ion
migration.
This
study
investigates
the
dynamic
evolution
of
under
irradiation
using
electron-temperature-dependent
deep
potential
(ETD-DP)
model.
Compared
with
traditional
ab
initio
molecular
dynamics
(AIMD)
simulations,
ETD-DP
method
extends
both
spatial
temporal
scales
by
several
orders
magnitude.
The
results
reveal
that
LiCoO2's
response
to
occurs
on
nanosecond
time
scale,
divided
into
three
stages:
traversal,
intense
local
adjustment,
structure
relaxation.
During
adjustment
stage,
induces
migration
transition
metal
ions
toward
lithium
layers.
relaxation
cobalt
displaced
from
their
equilibrium
positions
form
a
dumbbell
adjacent
Co
ions.
simulation
were
validated
through
high-energy
electron
beam
experiments
aberration-corrected
microscopy.
provides
valuable
insights
improving
tolerance
LIB
offers
new
perspectives
application
particle-beam-based
fine
characterization
techniques
advanced
battery
applications.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 27, 2025
Abstract
The
pursuit
of
superior
electrochemical
and
safety
performances
in
sophisticated
battery
systems
is
progressively
forcing
the
community
to
dig
deep
inside
batteries,
seeking
any
clues
that
govern
their
performance.
As
a
powerful
decoupling
tool,
reference
electrode
(RE)
has
been
widely
utilized.
Nevertheless,
invasive
RE
virtually
changed
original
environment,
which
interference
inevitable
ambiguous.
Here,
comprehensive
influences
introduction
REs
pouch
cell
are
uncovered
regarding
performance,
chemistry,
safety.
blocking
effect
auxiliary
insulated
separator
on
ion
transport
responsible
for
first
two
variations,
further
attenuates
capability
exertion
battery,
turn,
disturbs
detection
service
RE.
In
addition,
adoption
reactive
lithium
metal
active
materials
also
raised
thermal
runaway
risk
battery.
These
necessitate
elaborate
design
configuration
structure
RE,
minimizing
invasion
batteries
while
ensuring
reliability
detection.
This
work
emphasizes
non‐negligible
insertion
influence
paves
way
practical
deployment
REs.
Advanced Energy Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 25, 2024
Abstract
In
addressing
the
global
climate
crisis,
energy
storage
performance
of
Li‐ion
batteries
(LIBs)
under
extreme
conditions,
particularly
for
high‐energy‐density
Li‐rich
layered
oxide
(LRLO)
cathode,
is
essence.
Despite
numerous
researches
into
mechanisms
and
optimization
LRLO
cathodes
ideal
moderate
environment,
there
a
dearth
case
studies
on
their
practical/harsh
working
environments
(e.g.,
pouch‐type
full‐cell,
high‐temperature
storage),
which
critical
aspect
safety
commercial
application.
this
study,
using
full‐cells
as
prototype
investigation
target,
study
finds
cell
assembled
with
cathode
present
severer
voltage
decay
than
typical
NCM
after
storage.
Further
decoupling
elucidates
primary
failure
mechanism
over‐activation
lattice
oxidized
oxygen
(aggravate
by
storage)
subsequent
escape
species
(O
n−
),
disrupts
transition
metal
(TM)
coordination
exacerbates
electrolyte
decomposition,
leading
to
severe
TM
dissolution,
interfacial
film
reconstruction,
harmful
shuttle
effects.
These
chain
behaviors
upon
significantly
influence
stability
both
electrodes,
causing
substantial
lithium
loss,
accelerates
full‐cell
failure.
Although
anionic
redox
reaction
can
bring
additional
energy,
but
metastable
O
would
introduce
new
concerns
in
practical
conditions.
