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.
ACS Nano,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 7, 2025
The
multielectron
conversion
electrochemistry
of
I–/I0/I+
enables
high
specific
capacity
and
voltage
in
zinc–iodine
batteries.
Unfortunately,
the
I+
ions
are
thermodynamically
unstable
highly
susceptible
to
hydrolysis.
Current
endeavors
primarily
focus
on
exploring
interhalogen
chemistry
activate
I0/I+
couple.
However,
practical
working
is
below
theoretical
level.
In
this
study,
redox
couple
fully
activated,
efficiently
stabilized
by
a
chelation
agent
cost-effective
urea
conventional
aqueous
electrolyte.
A
record-high
plateau
1.8
V
vs
Zn/Zn2+
has
been
realized.
Theoretical
calculations
combined
with
spectroscopy
studies
electrochemical
tests
reveal
that
coordination
between
electron-deficient
electron-rich
O
N
atoms
molecules
favorable
for
inhibits
self-disproportionation
I+,
which
turn
promotes
rapid
kinetics
excellent
reversibility
I0/I+.
Moreover,
decreases
water
activity
electrolyte
forming
hydrogen
bonds
further
suppress
hydrolysis
I+.
Accordingly,
419
mAh
g–1
delivered
at
1C,
147
retained
after
10,000
cycles
5C.
This
work
offers
effective
insights
into
formulating
halogen-free
electrolytes
high-performance
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 19, 2025
Abstract
The
design
of
anode‐free
zinc
(Zn)
batteries
with
high
reversibility
at
areal
capacity
has
received
significant
attention
recently,
which
is
quietly
challenging
yet.
Here,
a
Zn
alloyed
interface
through
electroplating
introduced,
providing
homogeneous
prenucleation
sites
to
stabilize
subsequent
nucleation
and
plating.
By
employing
Zn–Cu
alloy
as
module,
the
complementary
simulations
characterizations
confirm
that
interfaces
achieve
electric
field
distribution
greatly
enhance
stability
anode.
Accordingly,
Zn//Zn–Cu@Cu
half‐cells
show
long
cycle
life
over
900
h
an
average
Coulombic
efficiency
(CE)
99.8%
10
mAh
cm
−2
.
assembled
zinc–bromine
(Zn–Br
2
)
battery
exhibits
attractive
stable
cycling
11
000
cycles
1
,
while
1000
higher
Excitingly,
Zn–Br
pouch
cell
operates
stably
50
cycles,
achieves
successful
integration
photovoltaic
systems.
This
constructed
strategy
offer
new
insights
into
potential
for
large‐scale
energy
storage
applications.
