Aqueous
zinc-ion
batteries
(AZIBs)
are
considered
a
promising
option
for
large-scale
energy
storage
because
of
their
low
cost
and
high
safety.
However,
the
lack
suitable
cathode
materials
has
limited
development.
Vanadium-based
oxides
have
been
widely
studied
due
to
layered
crystal
structures
theoretical
specific
capacities.
Nevertheless,
they
prone
vanadium
dissolution
cycle
life
during
cycling.
Pre-embedding
K+
in
V2O5
by
hydrothermal
method
increases
layer
spacing
stabilizes
structure.
Oxygen
vacancies
introduced
provide
more
sites
Zn
storage.
The
results
show
that
K0.39V2O5·0.52H2O
nanostructures
exhibit
stable
cycling
performance.
capacity
is
552
mAh
g–1
at
0.1
A
g–1,
retention
90%
11,000
cycles
10
g–1.
When
electrolyte
changed
from
Zn(CF3SO3)2
ZnSO4,
rate
98%
after
200
1
nearly
100%
2400
This
study
highlights
potential
ion
doping
oxygen
defects
modifying
electrodes
provides
guide
exploring
working
mechanisms
aqueous
batteries.
Journal of Materials Chemistry A,
Journal Year:
2023,
Volume and Issue:
12(3), P. 1725 - 1735
Published: Dec. 11, 2023
Layered
vanadium
oxides
with
highly
open
crystal
structures
and
high
theoretical
capacity
are
regarded
as
the
most
promising
cathode
materials
for
high-performance
aqueous
zinc-ion
batteries
(ZIBs).
Energy & Environmental Science,
Journal Year:
2024,
Volume and Issue:
17(6), P. 2100 - 2116
Published: Jan. 1, 2024
Cointercalation
reactions,
of
particular
interest
for
emerging
battery
cell
chemistries,
are
more
effectively
controlled
when
matching
electrolyte
formulation
with
nanoconfinement
properties
within
the
interlayer
space
host
materials.
ACS Applied Energy Materials,
Journal Year:
2024,
Volume and Issue:
7(3), P. 1298 - 1305
Published: Feb. 1, 2024
Delta
MnO2
(δ-MnO2)
is
a
promising
cathode
material
for
aqueous
zinc
ion
batteries.
However,
the
electrochemical
performance
of
δ-MnO2
severely
limited
by
sluggish
reaction
kinetics,
low
electronic
conductivity,
and
inferior
structural
stability.
In
this
study,
we
propose
simple
general
approach
preintercalation
large-sized
organic
cations
between
layers
δ-MnO2.
Our
method
based
on
layer-by-layer
electrostatic
assembly
colloidal
building
blocks
consisting
nanosheets
various
cations.
The
results
in
unprecedented
expansion
interlayer
spacing
to
more
than
1.0
nm,
thereby
significantly
enhancing
kinetics
ionic
diffusion.
These
introduced
act
as
supportive
pillars
contribute
modulation
structure
δ-MnO2,
ultimately
its
stability
conductivity.
Electrochemical
evaluations
demonstrate
superior
terms
capacity,
rate
capability,
cycling
compared
with
that
pristine
cathode.
findings
provide
valuable
insights
into
design
high-performance
materials
improved
diffusion
energy
storage
capabilities.
Small,
Journal Year:
2024,
Volume and Issue:
20(28)
Published: Feb. 11, 2024
Abstract
Ammonium
vanadates,
featuring
an
N─H···O
hydrogen
bond
network
structure
between
NH
4
+
and
V─O
layers,
have
become
popular
cathode
materials
for
aqueous
zinc‐ion
batteries
(AZIBs).
Their
appeal
lies
in
their
multi‐electron
transfer,
high
specific
capacity,
facile
synthesis.
However,
a
major
drawback
arises
as
Zn
2+
ions
tend
to
form
bonds
with
electronegative
oxygen
atoms
layers
during
cycling,
leading
irreversible
structural
collapse.
Herein,
Li
pre‐insertion
into
the
intermediate
layer
of
V
O
10
is
proposed
enhance
electrochemical
activity
ammonium
vanadate
cathodes
AZIBs,
which
extends
interlayer
distance
9.8
Å
offers
large
interlaminar
channels
(de)intercalation.
Moreover,
intercalation
weakens
crystallinity,
transforms
micromorphology
from
non‐nanostructured
strips
ultrathin
nanosheets,
increases
level
defects,
thus
exposing
more
active
sites
ion
electron
transport,
facilitating
electrolyte
penetration,
improving
kinetics
electrode.
In
addition,
introduction
significantly
reduces
bandgap
by
0.18
eV,
enhancing
transfer
redox
reactions.
Leveraging
these
unique
advantages,
pre‐intercalated
exhibits
reversible
capacity
486.1
mAh
g
−1
at
0.5
A
impressive
retention
rate
72%
after
5,000
cycles
5
.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: July 5, 2024
Abstract
Aqueous
zinc
ion
batteries
coupling
with
conventional
hydrogel
electrolyte
have
the
advantages
of
high
safety,
low
cost,
and
simple
manufacturing
process
while
they
are
difficult
for
fast
charging/discharging
application
scenarios
due
to
sluggish
kinetics.
Herein,
a
new
strategy
is
developed
synthesizing
highly‐entangled
polyacrylamide
(HE‐PAM)
dramatically
enhance
transportation
mechanical
stability.
The
has
lower
ionic
resistance
strong
elastic
modulus.
After
being
assembled
into
Zn/MnO
2
batteries,
HE‐PAM
exhibits
excellent
cycling
stability
high‐rate
capability
under
current
densities.
Specifically,
Zn//HE‐PAM//MnO
battery
can
resist
highest
35
A
g
−1
,
which
outperforms
previously
reported
works.
Moreover,
also
support
in
proton
capacity
retention
rate
50%
50
.
This
progress
on
electrolytes
boost
development
quasi‐solid‐state
aspect.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(48)
Published: July 22, 2024
Abstract
Aqueous
zinc‐ion
batteries
(ZIBs)
hold
immense
potential
for
large‐scale
energy
storage,
but
their
practical
implementation
faces
significant
challenges
related
to
the
zinc
anode,
including
dendrite
formation,
corrosion,
and
hydrogen
evolution.
This
study
addresses
these
by
introducing
diethylenetriamine
pentaacetate
sodium
salt
(DTPA‐Na)
as
a
novel
electrolyte
additive.
DTPA‐Na
exhibits
unique
dual
functionality,
enabling
formation
of
robust,
multi‐layered
solid
interphase
(SEI)
on
anode
stable
cathode
(CEI)
MnOOH
cathode.
The
engineered
SEI
effectively
suppresses
interfacial
side
reactions,
facilitates
uniform
deposition,
mitigates
growth,
while
CEI
inhibits
dissolution
detrimental
reactions.
synergistic
SEI/CEI
engineering
approach
significantly
enhances
ZIB
performance,
achieving
remarkable
cycling
stability
self‐discharge
inhibition,
evidenced
extended
lifespan
Zn||Zn
symmetrical
cells
(4400
hours
at
0.5
mA/cm
2
)
exceptional
capacity
retention
Zn||MnOOH
full
after
prolonged
rest
(98.61
%
720
hours).
