Materials Futures,
Journal Year:
2024,
Volume and Issue:
3(4), P. 045101 - 045101
Published: Sept. 5, 2024
Abstract
The
increasing
demand
for
advanced
energy
storage
solutions
has
driven
extensive
research
into
Zn-ion
batteries
due
to
their
safety,
cost-effectiveness,
and
environmental
compatibility.
This
study
presents
a
synthesis
evaluation
of
VO
2
@VS
hollow
nanospheres
as
novel
cathode
material
batteries.
composite,
synthesized
via
one-step
hydrothermal
method,
demonstrates
significant
improvement
in
electrochemical
performance.
exhibits
reversible
capacity
468
mAh
g
−1
at
0.1
A
maintains
high
237
1.0
over
1000
cycles
with
retention
rate
85%.
Electrochemical
analyses
reveal
enhanced
charge
transfer
storage,
attributed
the
synergistic
effect
built-in
electric
field
VS
heterostructure.
Additionally,
composite
shows
superior
kinetics,
facilitating
rapid
ion
transport
transfer.
In-situ
Raman
analysis
confirms
mechanism,
further
validating
composite’s
structural
stability
during
cycling.
Density
functional
theory
calculations
support
these
findings,
indicating
potential
high-rate
capability
long-term
cycling
stability.
highlights
promise
advancing
performance
aqueous
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
34(9)
Published: Nov. 21, 2023
Abstract
The
Zn
2+
sluggish
kinetics
resulting
from
high
desolvation
barriers
of
Zn(H
2
O)
6
in
the
electrode/electrolyte
interface
restricts
practical
application
Zn‐ion
batteries
(ZIBs).
Herein,
ethylene
glycol
(EG)
molecules
are
inserted
into
V
O
5
·3H
to
form
V‐EG
nanoarray
structures
improve
diffusion
rate.
Unlike
most
efforts
focused
on
improving
interlayer
spacing
and
structural
stability,
influence
EG
storage
process
main
goals.
Based
experimental
theoretical
analysis,
confirmed
participate
reshaping
morphology
solvation
structure,
which
is
beneficial
enhance
reaction
specific
capacity.
polar
group
molecule
leads
it
anchored
VO
skeleton
decreases
energy,
while
steric
hindrance
low
polarity
liberalizes
transfer
reversibly
skeleton.
Therefore,
delivers
a
higher
ion
coefficient
lower
kinetic
barrier.
As
expected,
exhibits
capacity
553
mA
h
g
−1
at
0.3
A
long
cycle
life
10
000
cycles
20
.
This
work
provides
strategy
decrease
energy
cathode
materials
toward
advanced
ZIBs.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(32)
Published: June 1, 2024
Heterogeneous
electrode
materials
possess
abundant
heterointerfaces
with
a
localized
"space
charge
effect",
which
enhances
capacity
output
and
accelerates
mass/charge
transfer
dynamics
in
energy
storage
devices
(ESDs).
These
promising
features
open
new
possibilities
for
demanding
applications
such
as
electric
vehicles,
grid
storage,
portable
electronics.
However,
the
fundamental
principles
working
mechanisms
that
govern
are
not
yet
fully
understood,
impeding
rational
design
of
materials.
In
this
study,
heterointerface
evolution
during
charging
discharging
process
well
intricate
interaction
between
charge/mass
transport
phenomena,
is
systematically
discussed.
Guidelines
along
feasible
strategies
engineering
structural
to
address
specific
challenges
encountered
various
application
scenarios,
also
provided.
This
review
offers
innovative
solutions
development
heterogeneous
materials,
enabling
more
efficient
beyond
conventional
electrochemistry.
Furthermore,
it
provides
fresh
insights
into
advancement
clean
conversion
technologies.
contributes
knowledge
understanding
heterointerfaces,
paving
way
optimization
next-generation
sustainable
future.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(7), P. 8922 - 8929
Published: Feb. 8, 2024
Vanadium-based
oxides
have
garnered
significant
attention
as
cathode
materials
for
aqueous
zinc-ion
batteries
(AZIBs)
because
of
their
high
theoretical
capacity
and
low
cost.
However,
the
limited
reaction
kinetics
poor
long-term
cycle
stability
hinder
widespread
application.
In
this
paper,
we
propose
a
novel
approach
by
coinserting
Ni2+
NH4+
ions
into
V2O5·3H2O,
i.e.,
NNVO.
Structural
characterization
shows
that
coinsertion
not
only
extends
interlayer
spacing
V2O5·3H2O
but
also
significantly
promotes
transport
Zn2+
synergistic
"pillar"
effect
NH4+,
well
increased
oxygen
vacancies
effectively
lower
energy
barrier
insertion.
As
result,
AZIBs
with
an
NNVO
electrode
exhibit
398.1
mAh
g–1
(at
1.0
A
g–1)
good
89.1%
retention
even
after
2000
cycles
at
5.0
g–1.
At
same
time,
highly
competitive
density
262.9
Wh
kg–1
is
delivered
382.9
W
kg–1.
Considering
simple
scheme
resultant
performance,
study
may
provide
positive
attempt
to
develop
high-performance
AZIBs.
International Journal of Electrochemical Science,
Journal Year:
2024,
Volume and Issue:
19(6), P. 100573 - 100573
Published: April 6, 2024
Manganese
dioxide
has
received
significant
attention
as
a
prospective
cathode
material
in
aqueous
zinc-ion
batteries
(ZIBs)
owing
to
its
elevated
working
voltage
and
commendable
energy
density.
Nevertheless,
challenges
such
structural
instability,
manganese
dissolution,
poor
electrical
conductivity
remain
barriers
the
practical
application
of
research.
Here,
MnO2
nanorods
encapsulated
amorphous
carbon
(MnO2@C)
with
core-shell
structure
are
prepared
by
special
hard
template
method,
investigated
materials
for
ZIBs.
The
carbon,
characterized
defects
disorder,
manifests
heightened
active
site
density,
thereby
establishing
an
efficient
conduit
charge
transport.
Concurrently,
nano-dimensional
interstitial
spaces
augment
sites
available
zinc
insertion
reactions,
effectively
curtailing
ion
diffusion
path
and,
consequently,
engendering
electrochemical
performance.
Moreover,
distinctive
architecture
MnO2@C
not
only
furnishes
substantial
spatial
accommodation
but
also
serves
alleviate
volume
alterations
throughout
discharge
events.
Consequently,
demonstrates
outstanding
performance,
reversible
capacities
210
mAh·g-1
50
at
0.1
A·g-1
1.6
A·g-1,
respectively.
Furthermore,
even
after
600
cycles
0.8
it
maintains
exceptional
cycling
reaching
102
mAh·g-1,
endowing
cathodes
robust
competitiveness
