ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
17(2), С. 3467 - 3477
Опубликована: Дек. 31, 2024
This
work
develops
1,1′-oxalyldiimidazole
(ODI)
as
a
functional
electrolyte
additive.
film-forming
additive
improves
the
wide
range
of
temperature
and
rate
performances
LiNi0.8Co0.1Mn0.1O2/graphite
(NCM811)
batteries.
After
1200
cycles
at
room
(25
°C),
discharge
capacity
retention
is
51.95%
for
battery
with
blank
electrolyte,
it
93.18%
that
an
ODI-containing
electrolyte.
With
0.1%
ODI,
increases
from
0
to
75.89%
after
500
45
°C
48.51
95.54%
300
−10
°C.
In
addition,
performance
also
enhanced
by
introduction
ODI.
spectroscopic
characterization,
improvement
electrochemical
ODI
supported.
It
demonstrated
tends
preferentially
decompose
on
electrodes
then
participates
in
construction
stable
interfacial
film
low
impedance,
resulting
performance.
Not
only
does
this
develop
imidazole-based
but
inspires
innovative
approaches
creating
additives
can
enhance
Abstract
Silicon
anodes
show
great
potential
for
next-generation
lithium-ion
batteries
due
to
their
exceptional
energy
storage
capacity.
However,
practical
application
is
hindered
by
challenges
such
as
significant
volume
changes
during
cycling
and
the
formation
of
unstable
interphases.
This
review
explores
recent
advancements
in
electrolyte
design
strategies
that
address
these
challenges.
A
thorough
analysis
various
solvent
systems,
salts,
functional
additives
examines
roles
stabilizing
interphases
mitigating
degradation
processes.
The
focuses
on
innovative
formulations
optimize
ionic
conductivity,
enhance
mechanical
resilience,
ensure
long-term
stability.
By
examining
interaction
between
components
silicon’s
unique
properties,
this
work
provides
a
framework
improving
performance
reliability
silicon-based
batteries,
which
will
facilitate
adoption
high-energy-density
applications.
Journal of the American Chemical Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 21, 2025
Correlating
the
solvation
structure
and
thermodynamic
properties
with
transport
serves
as
foundation
for
electrolyte
design.
While
various
physicochemical
properties,
such
relative
solvating
power,
energy,
spectroscopies
have
been
used
to
study
ion
solvation,
fundamental
investigations
in
of
equilibrium
across
broad
temperature
ranges
are
not
available.
In
this
work,
we
combined
temperature-resolved
Infrared
Raman
systematically
pinpoint
dynamic
evolution
Li+-solvent
Li+-anion
local
coordination
typical
ether
carbonate
electrolytes
from
-60
60
°C.
We
identified
a
trend
temperature-driven
among
components.
As
increases,
solvent-separated
pairs
(SSIP)
prone
converting
contact
(CIP),
CIP
reverts
SSIP
reversibly
decreases.
By
quantifying
temperature-responsive
mean
number
solvate
species
concentrations,
reveal
preferential
association
carbonates
compared
that
ethers.
Gibbs
free
energy
changes
diverse
exhibit
strong
correlation
their
respective
Li+
transference
number.
The
offer
new
descriptors
structure,
solvation-property
knowledge
gained
these
model
can
serve
benchmark
reference
spectrum
battery
electrolytes.
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 21, 2025
Abstract
Low‐concentration
electrolytes
(LCEs)
present
significant
potential
for
actual
applications
because
of
their
cost‐effectiveness,
low
viscosity,
reduced
side
reactions,
and
wide‐temperature
electrochemical
stability.
However,
current
electrolyte
research
predominantly
focuses
on
regulation
strategies
conventional
1
m
electrolytes,
high‐concentration
localized
leaving
design
principles,
optimization
methods,
prospects
LCEs
inadequately
summarized.
face
unique
challenges
that
cannot
be
addressed
by
the
existing
theories
approaches
applicable
to
three
common
mentioned
above;
thus,
tailored
provide
development
guidance
are
urgently
needed.
Herein,
a
systematic
overview
recent
progress
in
is
provided
subsequent
directions
suggested.
This
review
proposes
core
challenge
high
solvent
ratio
LCEs,
which
triggers
unstable
organic‐enriched
electrolyte/electrode
interface
formation
anion
depletion
near
anode.
On
basis
these
issues,
modification
including
passivation
construction
solvent‒anion
interaction
optimization,
used
various
rechargeable
battery
systems.
Finally,
role
advanced
simulations
cutting‐edge
characterization
techniques
revealing
LCE
failure
mechanisms
further
highlighted,
offering
new
perspectives
future
practical
application
next‐generation
batteries.
Batteries,
Год журнала:
2025,
Номер
11(5), С. 173 - 173
Опубликована: Апрель 25, 2025
Composite
copper
foil,
a
novel
negative
electrode
current
collector
developed
in
recent
years,
can
significantly
enhance
battery
safety
and
energy
density
while
also
conserving
metallic
resources.
It
is
found
that
after
9
months
of
long-term
storage,
the
tensile
strength
composite
foil
decreases
by
9.76%,
elongation
rate
drops
26.32%.
The
internal
texture
shifts
from
highly
oriented
(111)
plane
to
more
random
crystal
orientation
bonding
improved.
study
reveals
residual
stress
within
layer
provides
driving
force
for
changes
microstructure;
intermediate
PET
plays
buffering
absorbing
role
stress-release
process.
regulates
redistribution
stress,
promoting
alteration
layer’s
refinement
grains.
Graphite-silicon
composite
anodes
have
been
regarded
as
some
of
the
most
practical
next-generation
anode
materials
for
commercialization.
However,
poor
interfacial
contact
between
Si
and
graphite
serious
volume
expansion
always
lead
to
even
worse
electrochemical
performances
than
pure
anode.
Herein,
we
report
a
stable
graphite-SiOx/C
(Gr@SiOx/C)
with
homogeneous
SiOx/C
coating
layer
on
surface
via
facile
sol–gel
process
subsequent
pyrolysis.
can
enhance
overall
capacity
while
possessing
low
expansion,
which
is
beneficial
maintaining
structural
stability.
Furthermore,
distribution
SiOx
C
frameworks
also
enables
rapid
Li+/electron
transport
toward
inner
core.
As
result,
as-prepared
Gr@SiOx/C
exhibits
excellent
cycling
stability
rate
capability
more
twice
at
1
A
g–1.
full
cell
assembled
NCM811
cathode
delivers
high
performance
retention
exceeding
90%
after
300
cycles
an
average
Coulomb
efficiency
99.24%.
This
work
expected
provide
reference
rational
design
graphite-silicon
in
lithium-ion
batteries.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
17(2), С. 3467 - 3477
Опубликована: Дек. 31, 2024
This
work
develops
1,1′-oxalyldiimidazole
(ODI)
as
a
functional
electrolyte
additive.
film-forming
additive
improves
the
wide
range
of
temperature
and
rate
performances
LiNi0.8Co0.1Mn0.1O2/graphite
(NCM811)
batteries.
After
1200
cycles
at
room
(25
°C),
discharge
capacity
retention
is
51.95%
for
battery
with
blank
electrolyte,
it
93.18%
that
an
ODI-containing
electrolyte.
With
0.1%
ODI,
increases
from
0
to
75.89%
after
500
45
°C
48.51
95.54%
300
−10
°C.
In
addition,
performance
also
enhanced
by
introduction
ODI.
spectroscopic
characterization,
improvement
electrochemical
ODI
supported.
It
demonstrated
tends
preferentially
decompose
on
electrodes
then
participates
in
construction
stable
interfacial
film
low
impedance,
resulting
performance.
Not
only
does
this
develop
imidazole-based
but
inspires
innovative
approaches
creating
additives
can
enhance
