ACS Applied Nano Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 16, 2024
With
the
increasing
demand
for
high-performance
energy
storage
devices,
potassium-ion
batteries
(PIBs)
have
attracted
significant
interest
due
to
their
large
capacity,
affordability,
and
high
density.
However,
radius
of
potassium
ions
necessitates
strong
structural
stability
in
anode
material
sustain
long-term
cycling.
In
this
work,
a
self-templated
nitrogen/sulfur
co-doping
carbon
was
designed
synthesized
using
thiourea
as
both
doping
source
template.
This
approach
facilitated
incorporation
nitrogen
sulfur
heteroatoms
while
creating
highly
ordered
structure
during
carbonization
process.
The
experimental
results
demonstrated
that
additional
S
not
only
elevated
N
level
provide
more
K-storage
sites,
which
improved
specific
but
also
increased
stacking
order
improve
PIBs.
N/S
encouraged
formation
high-ionic
conductivity
SEI
film
fast
interfacial
kinetics.
prepared
its
great
potential
an
PIBs
by
delivering
capacities
327
mAh
g–1
at
50
mA
maintaining
excellent
cycling
stability,
achieved
179
after
long
2000
cycles
current
density
1000
g–1.
study
provided
some
good
ideas
methods
development
materials
Lithium-ion
batteries
(LIBs)
with
silicon/graphite
composite
(Si/C)
anodes
are
still
facing
the
challenge
of
unsatisfactory
calendar
life,
and
specific
impact
Si
on
this
issue
is
largely
unknown.
Herein,
aging
behaviors
quantified
across
scales
explored
in
a
top-down
manner.
Batteries
10
wt
%
Si/C
suffer
4-fold
decrease
overall
lifetime
4–5-fold
increase
irreversible
anode
loss.
Significant
parasitic
reactions
solid
electrolyte
interphase
growth
occur
after
72
h
storage
an
oxygen
1.3
times
surface
26
interphase.
The
micromorphology
component
analyzed
detail,
highlighting
remarkable
Li2CO3
precipitation.
Finally,
discussed
both
external
conditions
internal
components.
Mitigating
decomposition
caused
by
active
will
be
key
to
improving
battery's
life.
Abstract
Aqueous
zinc‐ion
batteries
(AZIBs)
are
a
promising
alternative
to
lithium‐ion
batteries,
boasting
superior
safety,
eco‐friendliness,
and
cost‐effectiveness.
Despite
these
advantages,
performance
issues
such
as
irregular
Zn
deposition
cathode
material
dissolution
remain
challenging.
This
study
introduces
an
intrinsically
anisotropic
ion‐guiding
hydrogel
electrolyte
(APHE)
fabricated
via
double‐stabilization
freezing
strategy.
The
synergistic
effect
of
structure
high
water
affinity
APHE
effectively
suppress
water‐induced
parasitic
reactions.
In
brief,
the
promotes
rapid
2+
ion
diffusion,
leading
uniform
flux.
Additionally,
abundant
hydroxyl
groups
in
facilitate
dissociation
adjust
solvation
structure,
setting
it
apart
from
isotropic
matrix.
Furthermore,
improvement
diffusion
tortuosity
enhances
electrode/electrolyte
kinetics,
thereby
improving
rate‐capability
reversibility
(de)‐intercalation.
Thus,
demonstrates
thin
dense
layer
31.7
µm,
which
is
less
than
half
thickness
IPHE
(67.5
µm)
after
500
cycles.
research
addresses
fundamental
challenges
AZIBs
provides
valuable
insights
into
design
advanced
electrolytes
for
future
energy
storage
systems.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 8, 2025
Lithium-ion
batteries
(LIBs)
play
a
critical
role
in
modern
energy
storage
systems,
enabling
their
widespread
use
portable
electronics,
electric
vehicles,
and
grid-scale
applications.
However,
accurately
identifying
separating
internal
resistance
components
remains
significant
challenge,
limiting
the
optimization
of
battery
performance
longevity.
Here,
utilizing
distribution
relaxation
time
(DRT)
method,
we
deconvolute
overlapping
impedance
analyze
six
distinct
polarization
processes
within
system.
This
study
demonstrates
that
oxide
solid
electrolyte
separator
enhances
ionic
conductivity,
thermal
stability,
Li-ion
transport,
surpassing
conventional
PE
separators.
Furthermore,
situ
DRT
analysis
identifies
degradation
mechanisms,
emphasizing
charge
transfer
diffusion
decline.
Collectively,
these
findings
provide
valuable
insights
into
origins
factors
practical
systems
offer
pathway
to
development
high-performance
LIBs
with
improved
durability
efficiency.
