A Water‐Repellent Ionic Liquid/MOF Protective Layer for Stable Zinc Anodes
Small Methods,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 4, 2025
Abstract
Aqueous
zinc‐ion
batteries
have
emerged
as
promising
candidates
for
large‐scale
energy
storage,
but
their
cycle
stability
is
limited
by
irreversible
zinc
anodes
due
to
dendrite
growth
and
undesired
side
reactions.
Here,
an
artificial
composite
protective
layer
consisting
of
a
Zn
metal–organic
framework
(MOF)
infiltrated
with
hydrophobic
ionic
liquid
1‐ethyl‐3‐methylimidazoline
bis(trifluoromethyl
sulfonyl)
imide
constructed
on
anodes.
The
unique
porous
structure
the
MOF
enables
uniform
electric
field
distribution,
effectively
inducing
plating
stripping.
Meanwhile,
small
amount
can
isolate
direct
contact
between
anode
aqueous
electrolyte,
thereby
inhibiting
reactions
including
hydrogen
evolution
reaction.
In
addition,
cations
in
act
shielding
suppress
tip
effect.
Consequently,
metal
greatly
improved.
assembled
symmetric
cell
able
stably
over
2600
h
at
0.2
mA
cm
−2
/0.2
mAh
800
1
/1
,
which
also
exhibits
lower
more
stable
overpotentials.
Язык: Английский
Improved Performances of Zn//MnO2 Batteries with an Electrolyte Containing Co-Additives of Polyethylene Glycol and Lignin Derivatives
Polymers,
Год журнала:
2025,
Номер
17(7), С. 888 - 888
Опубликована: Март 26, 2025
Multi-component
electrolyte
additives
may
significantly
contribute
to
improving
the
performance
of
rechargeable
aqueous
zinc-ion
batteries.
Herein,
we
propose
a
mixed
system
employing
polyethylene
glycol
200
(PEG200)
and
quaternized
kraft
lignin
(QKL)
as
co-additives
in
Zn//MnO2
Reduced
corrosion
suppression
hydrogen
evolution
reaction
on
zinc
electrode
were
achieved
when
0.5
wt.%
PEG200
0.2
QKL
added
reference
electrolyte.
This
optimized
electrolyte,
0.5%
+
0.2%
QKL,
was
conducive
Zn
reversibility
Zn//Zn
symmetric
batteries
resulted
higher
cycling
stability,
with
coulombic
efficiency
98.01%
under
1
mA
cm-2
mAh
for
Zn//Cu
cells.
Furthermore,
full
presented
good
overall
electrochemical
exhibited
decent
discharge
capacity
around
85
g-1
after
2000
cycles
at
1.5
A
g-1.
As
confirmed
by
X-ray
diffraction
scanning
electron
microscopy,
dominant
(002)
oriental
dendrite-free
deposition
anode
battery
using
byproducts
also
reduced
significantly.
study
has
contributed
development
Язык: Английский
Surface Laser Texturing and Alloying: Front-End Design Optimization of Zinc Metal Anode for Dendrite-Free Deposition
ACS Nano,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 17, 2025
A
critical
barrier
to
commercializing
aqueous
Zn-metal
batteries
lies
in
the
dual
challenges
of
dendritic
Zn
growth
and
parasitic
side
reactions
at
anode/electrolyte
interface.
Here,
this
study
presents
a
front-end
design
optimization
strategy
for
metal
anodes
(ZMAs),
combining
surface
laser
texturing
with
alloying
treatment
stabilize
interfacial
chemistry.
Specifically,
creates
geometrically
ordered
microstructure
on
surface,
while
subsequent
chemical
permeation
induces
situ
transformation
microstructured
layer
into
CuZn5
alloy,
forming
LT-Zn@CuZn5
anode.
The
alloy
coating
homogenizes
electronic
filed
distribution
across
zinc
enhances
corrosion
resistance.
Thereby,
anode
demonstrated
optimized
electrochemical
reversibility,
sustaining
over
3000
cycles
3
mA
cm-2/1
mAh
cm-2.
This
performance
translates
high
improvement
cycling
behavior
assembled
Zn||I2
soft
pack
battery,
which
acquired
an
initial
capacity
225.8
g-1
retained
79.1%
after
4000
cycles.
In
contrast,
counterpart
employing
untreated
foil
started
lower
180.7
failed
less
than
478
effective
approach
improves
ZMAs
contributes
development
dendrite-free
ZMAs.
Язык: Английский