Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 2, 2024
Abstract
Zn
metal
is
the
most
attractive
anode
material
for
aqueous
batteries,
yet
it
encounters
challenges
from
dendrites.
Here,
based
on
lanthanum
trifluoromethanesulfonate
(La(OTf)
3
)‐based
electrolyte,
idea
of
tailoring
electrode
interface
microenvironment
(ion
concentration,
solid
electrolyte
interphase
(SEI)
and
electric
field)
proposed
to
stabilize
anode.
The
theoretical
experimental
results
show
that
reconstruction
microstructure
by
OTf
−
capture
SO
4
2−
La
3+
enhance
liquid‐phase
mass
transfer,
which
alleviates
ion
concentration
gradient
surface.
Meanwhile,
decomposes
form
a
favorable
inorganic‐rich
SEI.
Importantly,
adsorbed
homogenizes
field
intensity
at
tip
Benefiting
improved
microenvironment,
electrodeposition
behavior
efficiently
regulated,
endowing
self‐elimination
regenerated
As
proof‐of‐concept,
shows
highly
reversible
plating/stripping
cycling
in
both
Zn||Cu
(7000
cycles)
Zn||Zn
cells
(3600
h).
Also,
NH
V
O
10
||Zn
pouch
cell
operates
stably
over
500
cycles
exhibits
low‐gassing
behavior.
Nano Letters,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 21, 2025
Uncontrollable
dendrite
growth
can
jeopardize
the
cycle
life
of
aqueous
Zn
batteries.
Here,
we
propose
a
general
strategy
engineering
artificial
protrusions
(APs)
on
electrode
surface
to
regulate
distribution
interface
electric
field
and
induce
stable
plating/stripping
for
The
junction-free
AP-Cu
network
is
constructed
Cu
foil
by
an
ultrafast
Joule-heating-welding
method.
COMSOL
simulation
reveals
that
stronger
microelectric
formed
around
individual
AP,
which
effectively
uniform
nucleation
network.
Guided
structural
advantages
AP
design,
AP-Cu∥Zn
cell
delivers
average
Coulombic
efficiency
(CE)
99.85%
at
2
C
with
areal
capacity
1.77
mAh
cm-2
over
3000
cycles.
Moreover,
design
enables
cycling
both
Zn|AP-Cu∥V2O5
anode-free
AP-Cu∥Br2
full
cells,
providing
promising
development
high-performance
energy
storage
devices.
ACS Nano,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 2, 2025
Distinct
from
the
conventional
I3-/I-
redox
couple
(1.299
V),
I3-/I2
(1.552
V)
can
enhance
output
voltage
and
achieve
higher
energy
density,
which
exhibits
great
development
potential.
However,
sluggish
solid-liquid
reaction
rate,
high
conversion
barrier,
polyiodide
solubility
in
aqueous
electrolytes
together
hinder
its
development,
especially
at
a
low
N/P
ratio.
Herein,
we
introduce
an
approach
to
fast
liquid-liquid
kinetics
lower
barrier
for
valence
iodine
electrochemistry
of
I3-/I2,
by
coupling
chemical
liquefaction
(MPII
ionic
liquid)
chelating
catalyst
(triazine-based
poly(ionic
liquid),
PIL-tri).
The
MPII
spontaneously
react
with
solid
I2
generate
liquid
MPII3,
increasing
contact
sites
accelerating
kinetics.
Besides,
PIL-tri
significantly
lowers
I3-
restricts
triiodide
shuttling
distinctive
iodide-π
(I-π)
conjugation
electron
cloud.
Such
synergistic
effect
kinetically
thermodynamically
ensures
couple.
Consequently,
PIL-tri@GP
Zn-polyiodide
batteries
demonstrate
(1.47
long
cycling
(800
cycles),
high-areal-capacity
twice
that
graphite
paper
(1.2
harsh
ratio
(1).
Meanwhile,
they
exhibited
polarity-switchable
characteristic
maintained
stable
cyclability
300
cycles
when
anode
cathode
were
reversed
every
50
cycles.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 13, 2025
Abstract
Conventional
electrolytes
in
aqueous
zinc‐iodine
batteries
struggle
to
suppress
the
shuttle
effect
and
enhance
interfacial
stability,
resulting
high
self‐discharge
rate,
low
areal
capacity,
short
cycle
life.
To
address
these
issues,
a
dual‐confinement
hydrogel
electrolyte
(DCHE)
is
designed
simultaneously
stabilize
iodine
cathode
zinc
anode
at
capacities
via
functionally
segregated
ion
regulation
strategy.
As
for
cathode,
anion‐functional
groups
DCHE
repel
polyiodides,
while
cation‐functional
adsorb
those
that
escape
repulsion,
thereby
reinforcing
suppression
of
polyiodide
migration
toward
anode.
This
dual
confinement
effect,
validated
by
theoretical
simulations
situ
characterization,
effectively
mitigates
effect.
Additionally,
hydrophilic
zincophilic
functional
regulate
hydrogen‐bond
network
Zn
2+
flux,
strengthening
electrochemical
stability
result,
Zn//ZnI
2
cell
assembled
with
delivers
practical
capacity
4.5
mAh
cm
−2
achieves
record‐long
lifespan
exceeding
6000
h
88.9%
retention
100
mA
g
−1
.
Furthermore,
single‐layer
pouch
exhibits
good
mechanical
retaining
80%
its
after
cycles
90°
bending.
work
highlights
importance
advancing
high‐performance
batteries.
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 2, 2024
Abstract
Zn
metal
is
the
most
attractive
anode
material
for
aqueous
batteries,
yet
it
encounters
challenges
from
dendrites.
Here,
based
on
lanthanum
trifluoromethanesulfonate
(La(OTf)
3
)‐based
electrolyte,
idea
of
tailoring
electrode
interface
microenvironment
(ion
concentration,
solid
electrolyte
interphase
(SEI)
and
electric
field)
proposed
to
stabilize
anode.
The
theoretical
experimental
results
show
that
reconstruction
microstructure
by
OTf
−
capture
SO
4
2−
La
3+
enhance
liquid‐phase
mass
transfer,
which
alleviates
ion
concentration
gradient
surface.
Meanwhile,
decomposes
form
a
favorable
inorganic‐rich
SEI.
Importantly,
adsorbed
homogenizes
field
intensity
at
tip
Benefiting
improved
microenvironment,
electrodeposition
behavior
efficiently
regulated,
endowing
self‐elimination
regenerated
As
proof‐of‐concept,
shows
highly
reversible
plating/stripping
cycling
in
both
Zn||Cu
(7000
cycles)
Zn||Zn
cells
(3600
h).
Also,
NH
V
O
10
||Zn
pouch
cell
operates
stably
over
500
cycles
exhibits
low‐gassing
behavior.
