Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: July 31, 2024
The
inner
Helmholtz
plane
and
thus
derived
solid-electrolyte
interphase
(SEI)
are
crucial
interfacial
structure
to
determine
the
electrochemical
stability
of
Zn-ion
battery
(ZIB).
In
this
work,
we
demonstrate
that
introducing
β-cyclodextrins
(CD)
as
anion-receptors
into
Zn(OTf)2
aqueous
electrolyte
could
significantly
optimize
Zn
anode
SEI
for
achieving
stable
ZIB.
Specifically,
β-CD
with
macrocyclic
holds
appropriate
cavity
size
charge
distribution
encase
OTf-
anions
at
metal
surface
form
β-CD@OTf-
dominated
structure.
Meanwhile,
electrochemically
triggered
decomposition
in
situ
convert
organic-inorganic
hybrid
(ZnF2/ZnCO3/ZnS‒(C-O-C/*CF/*CF3)),
which
efficiently
hinder
dendrite
growth
maintain
proper
mechanical
strength
guarantee
long-term
stability.
thus-derived
|
|Zn
pouch
cell
(21
cm2
size)
β-CD-containing
exhibits
a
cumulative
capacity
6450
mAh−2
cm−2
conditions
10
mAh
high
areal
capacity.
This
work
gives
insights
reaching
ZIB
via
additive
regulation.
Here,
authors
report
βcyclodextrins
Nano-Micro Letters,
Journal Year:
2024,
Volume and Issue:
16(1)
Published: Jan. 25, 2024
Abstract
The
practical
application
of
aqueous
zinc-ion
batteries
for
large-grid
scale
systems
is
still
hindered
by
uncontrolled
zinc
dendrite
and
side
reactions.
Regulating
the
electrical
double
layer
via
electrode/electrolyte
interface
an
effective
strategy
to
improve
stability
Zn
anodes.
Herein,
we
report
ultrathin
zincophilic
ZnS
as
a
model
regulator.
At
given
cycling
current,
cell
with
Zn@ZnS
electrode
displays
lower
potential
drop
over
Helmholtz
(stern
layer)
suppressed
diffuse
layer,
indicating
regulated
charge
distribution
decreased
electric
repulsion
force.
Boosted
adsorption
sites
are
also
expected
proved
enhanced
double-layer
capacitance.
Consequently,
symmetric
protection
can
stably
cycle
around
3,000
h
at
1
mA
cm
−2
overpotential
25
mV.
When
coupled
I
2
/AC
cathode,
demonstrates
high
rate
performance
160
mAh
g
−1
0.1
A
long
10,000
cycles
10
.
Zn||MnO
sustains
both
capacity
130
after
1,200
0.5
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(6), P. 5003 - 5016
Published: Jan. 31, 2024
The
cycling
stability
of
a
thin
zinc
anode
under
high
utilization
has
critical
impact
on
the
overall
energy
density
and
practical
lifetime
ion
batteries.
In
this
study,
an
sieve
protection
layer
(ZnSnF@Zn)
was
constructed
in
situ
surface
by
chemical
replacement.
facilitated
transport
desolvation
ions
at
anode/electrolyte
interface,
reduced
deposition
overpotential,
inhibited
side
reactions.
Under
50%
utilization,
symmetrical
battery
with
maintained
stable
for
250
h
30
mA
cm–2.
Matched
high-load
self-supported
vanadium-based
cathodes
(18–20
mg
cm–2),
coin
possessed
retention
94.3%
after
1000
cycles
20
Furthermore,
assembled
pouch
delivered
whole
61.3
Wh
kg–1,
surpassing
highest
mass
among
reported
mild
batteries,
retained
76.7%
85.3%
(0.53
Ah)
capacity
300
cycles.
National Science Review,
Journal Year:
2024,
Volume and Issue:
11(7)
Published: June 13, 2024
ABSTRACT
Irreversible
interfacial
reactions
at
the
anodes
pose
a
significant
challenge
to
long-term
stability
and
lifespan
of
zinc
(Zn)
metal
batteries,
impeding
their
practical
application
as
energy
storage
devices.
The
plating
stripping
behavior
Zn
ions
on
polycrystalline
surfaces
is
inherently
influenced
by
microscopic
structure
anodes,
comprehensive
understanding
which
crucial
but
often
overlooked.
Herein,
commercial
foils
were
remodeled
through
incorporation
cerium
(Ce)
elements
via
‘pinning
effect’
during
electrodeposition
process.
By
leveraging
electron-donating
effect
Ce
atoms
segregated
grain
boundaries
(GBs),
electronic
configuration
restructured
increase
active
sites
for
nucleation.
This
facilitates
continuous
nucleation
throughout
growth
stage,
leading
high-rate
instantaneous-progressive
composite
model
that
achieves
spatially
uniform
distribution
nuclei
induces
spontaneous
refinement.
Moreover,
elevates
site
GBs,
mitigating
detrimental
parasitic
enhancing
GB
stability.
Consequently,
ZnCe
electrode
exhibits
highly
reversible
plating/stripping
with
an
accumulated
capacity
up
4.0
Ah
cm−2
in
symmetric
cell
over
4000
h
without
short-circuit
behavior.
Notably,
∼0.4
Zn||NH4V4O10
pouch
runs
110
cycles
83%
retention
high-areal-loading
cathode
(≈20
mg
cm−2).
refining-grains
strategy
offers
new
insights
into
designing
dendrite-free
rechargeable
batteries.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: July 31, 2024
The
inner
Helmholtz
plane
and
thus
derived
solid-electrolyte
interphase
(SEI)
are
crucial
interfacial
structure
to
determine
the
electrochemical
stability
of
Zn-ion
battery
(ZIB).
In
this
work,
we
demonstrate
that
introducing
β-cyclodextrins
(CD)
as
anion-receptors
into
Zn(OTf)2
aqueous
electrolyte
could
significantly
optimize
Zn
anode
SEI
for
achieving
stable
ZIB.
Specifically,
β-CD
with
macrocyclic
holds
appropriate
cavity
size
charge
distribution
encase
OTf-
anions
at
metal
surface
form
β-CD@OTf-
dominated
structure.
Meanwhile,
electrochemically
triggered
decomposition
in
situ
convert
organic-inorganic
hybrid
(ZnF2/ZnCO3/ZnS‒(C-O-C/*CF/*CF3)),
which
efficiently
hinder
dendrite
growth
maintain
proper
mechanical
strength
guarantee
long-term
stability.
thus-derived
|
|Zn
pouch
cell
(21
cm2
size)
β-CD-containing
exhibits
a
cumulative
capacity
6450
mAh−2
cm−2
conditions
10
mAh
high
areal
capacity.
This
work
gives
insights
reaching
ZIB
via
additive
regulation.
Here,
authors
report
βcyclodextrins
