Abstract
Aqueous
zinc−ion
batteries
(AZIBs)
are
considered
a
promising
choice
for
energy
storage
devices
owing
to
the
excellent
safety
and
favorable
capacity
of
Zn
anode.
However,
uncontrolled
dendrite
growth
anode
severely
constrains
practical
applications
AZIBs.
Herein,
novel
ion
enrichment
layer
CuS
is
designed
constructed
on
foil
surface
achieve
dendrite−free
This
with
appropriate
affinity
hollow
architecture
exhibits
enriching
characteristics.
Furthermore,
CuS@Zn
can
significantly
reduce
de−solvation
barriers
hydrated
2+
,
promoting
migration
minimizing
nucleation
overpotential.
Benefiting
from
above
results,
deposition
kinetics
effectively
improved.
As
expected,
improved
plating/stripping
reversibility
1000
h
at
1
mA
cm
−2
900
5
.
assembled
CuS@Zn||MnO
2
full
battery
also
superior
rate
performance
cycling
stability.
work
provides
feasible
method
uniform
dense
stabilization
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 9, 2025
Abstract
Aqueous
zinc‐ion
batteries
have
garnered
significant
attention
due
to
their
abundant
materials,
low
production
costs,
and
safety.
However,
these
suffer
from
severe
side
reactions,
which
are
closely
associated
with
the
presence
of
a
substantial
amount
solvent
at
electrode
surfaces.
Herein,
1,4,7,10,13,16‐hexaoxacyclooctadecane
(18‐crown‐6)
is
added
electrolyte
illustrate
both
theoretically
experimentally
its
contribution
rapid
desolvation
aspect.
It
shown
that
addition
18‐crown‐6
greatly
facilitates
solvated
structure
prevents
collection
molecules
on
surface
zinc
anode,
thus
inhibiting
hydrogen
precipitation
reaction.
also
enhances
transference
number
ions,
makes
interfacial
electric
field
anode
stable
promotes
orderly
diffusion
uniform
nucleation
Zn
2+
,
inhibits
growth
dendrites.
As
result,
containing
as
additives
shows
cycle
life,
Zn||Zn
symmetric
cell
cycled
for
nearly
1700
h
1
mA
cm
−2
showing
improvement
in
Coulombic
efficiency.
The
assembled
Zn||NH
4
V
O
10
exhibits
excellent
electrochemical
performance,
reaching
capacity
100.9
mAh
g
−1
even
after
4000
cycles
10.0
A
.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 20, 2025
Abstract
Zinc‐iodine
(Zn‐I
2
)
batteries
are
deemed
as
promising
next‐generation
energy
storage
devices
in
view
of
immanent
security
and
high
capacity.
Nevertheless,
their
applications
deteriorated
by
unruly
dendritic
Zn
growth,
severe
polyiodide
diffusion,
sluggish
iodine
redox
kinetics.
Herein,
MXene‐mediated
Janus
separators
with
heterogeneous
double‐sided
interfaces
designed
to
simultaneously
manipulate
deposition
accelerate
adsorption‐conversion
The
anode
side
is
composed
zincophilic
Cu‐modified
hollow
MXene
spheres,
which
not
only
decreases
nucleation
barrier
but
also
suppresses
dendrite
growth
homogenizing
electric
field
distribution
inducing
oriented
aspectant
dendrite‐free
between
the
separator
anode.
While
cathode
side,
consisting
iodophilic
Co‐modified
N‐doped
inhibits
shuttling
promotes
electrocatalytic
conversion
through
Co‐N‐C
sites.
Such
an
ingenious
engineering
achieves
a
durable
circulation
over
2900
h
for
Zn||Zn
symmetric
cells
brings
about
ultrahigh
capacity
274
mAh
g
−1
Zn‐I
well
ignorable
decay
(0.001%
per
circle)
after
20
000
cycles.
concept
design
integrating
interfacial
chemistry
regulation
physical
structure
optimization
this
work
provides
inspiration
constructing
advanced
exceptional
overall
performance.
Chemistry of Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 21, 2025
Rechargeable
aqueous
Zn/α-MnO2
batteries
have
drawn
enormous
interest
due
to
low
cost,
safety,
and
high
energy
density
as
a
promising
alternative
Li-ion
batteries.
In
contrast,
the
reaction
mechanism
of
charge
storage
still
remains
ambiguous
owing
complexity
side
reactions
in
electrolytes.
This
report
explored
fundamental
based
on
first-principles
calculation.
Zn4SO4(OH)6·xH2O
(ZHS)
is
deposited
from
irreversibly
dissolved
Mn
well
H+
intercalation
at
similar
voltage
range
first
discharge.
ZHS
then
transformed
ZnMn3O7·3H2O
(Zn
inserted
layered
chalcophanite)
with
distorted
α-MnO2
formation
slightly
compared
initial
during
charge.
Chalcophanite
reversibly
again
second
addition,
chalcophanite
are
very
inactive
for
ionic
electronic
transports
migration
barrier
Zn2+
large
band
gap.
It
inferred
that
reversible
transformation
vice
versa
dominant
can
also
degrade
electrochemical
properties
by
forming
limiting
ion
into
electrode.
occurs
(ΔV
=
230
mV)
intercalations.
Considering
surface
mainly
experiences
severe
reactions,
TiO2
coating,
indicating
thermodynamical
stability
mildly
acidic
electrolyte
Zn
barrier,
would
be
remedy
better
performance
conducting
protecting
Zn-ion
battery
cathode.
study
provides
insight
developing
