Molecules,
Год журнала:
2024,
Номер
29(16), С. 3848 - 3848
Опубликована: Авг. 14, 2024
Aqueous
zinc
ion
batteries
(AZIBs)
have
received
a
lot
of
attention
in
electrochemical
energy
storage
systems
for
their
low
cost,
environmental
compatibility,
and
good
safety.
However,
cathode
materials
still
face
poor
material
stability
conductivity,
which
cause
reversibility
rate
performance
AZIBs.
Herein,
heterogeneous
structure
combined
with
cation
pre-intercalation
strategies
was
used
to
prepare
novel
CaV6O16·[email protected]·nH2O
(CaNiVO)
high-performance
Zn
storage.
Excellent
achieved
via
the
wide
interlayer
conductive
network
originating
from
interlayer-embedded
metal
ions
heterointerfaces
two-phase
CaNiVO.
Furthermore,
this
unique
further
showed
excellent
structural
led
fast
electron/ion
transport
dynamics.
Benefiting
strategies,
CaNiVO
electrodes
an
impressive
specific
capacity
334.7
mAh
g−1
at
0.1
A
110.3
2
g−1.
Therefore,
paper
provides
feasible
strategy
designing
optimizing
superior
performance.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 3, 2025
Aqueous
magnesium-ion
batteries
(AMIBs)
have
garnered
a
lot
of
interest
in
future
energy
storage
due
to
their
high
density,
easy
preparation,
and
excellent
safety.
Yet,
the
lack
proper
electrode
material
with
high-capacity
performance
hinders
its
development.
In
this
work,
facile
heterojunction
VO2·xH2O@V2O5
(VOx)
nanobelt
structure
was
synthesized
by
an
electrochemical
deposition
process
for
AMIBs
first
time.
The
specific
combines
advantages
layered
V2O5
tunnel-like
VO2·xH2O,
which
shows
capacity
cycle
stability.
It
rate
performances
510
195.5
mAh
g–1
at
0.05
5
A
g–1,
respectively,
as
well
100
after
1000
cycles
1
g–1.
Combining
experimental
characterization
theoretical
calculations,
we
can
show
that
structured
water
VOX
improve
conductivity
diffusion
Mg2+.
mechanism
study
reveals
undergoes
cointercalation
reaction
H+
Mg2+
during
discharge
process.
This
not
only
highlights
role
structural
heterogeneous
design
enhancing
materials
but
also
offers
novel
approach
preparing
high-performance
AMIB
system.
By
modulating
the
quantity
of
complexed
NH4+
in
deposition
solution,
three
distinct
morphologies
multiphase
composite
films
composed
iron
vanadate
and
hydrogen
bronze
were
grown
on
an
indium
tin
oxide
(ITO)
conductive
substrate
using
liquid-phase
technique.
Among
them,
N-doped
FeVO4/Fe2V4O13/HxV2O5
triphase
nanosheets
exhibit
enhanced
discharge
capacities
at
a
high
current
density
retain
capacity
115.1
mAh
m-2
after
300
cycles.
Cyclic
voltammetry
tests
galvanostatic
charge-discharge
revealed
that
reduction/oxidation
potential
corresponding
to
Fe3+/Fe2+
redox
couple
during
cycling
was
0.14/0.40
V
(vs
Ag/AgCl
3
M
KCl).
X-ray
photoelectron
spectroscopy
further
elucidated
contribution
valence
transition
film
electrode,
as
well
presence
vanadium
both
V5+
V4+
oxidation
states
FF2H-S.
During
first
cycle,
molar
ratios
V5+/V4+
2.91,
2.08,
2.52,
respectively.
Then,
diffraction
insertion/extraction
mechanism
Na+,
FeVO4
had
oversized
storage
space
for
Na+.
It
helped
HxV2O5
Fe2V4O13
increase
Na+
transport
channels
provided
more
active
sites
facilitate
diffusion
kinetics
(the
average
DNa+
phase
5.49
×
10-13
cm2
s-1).
Moreover,
formation
solid
electrolyte
interphase
(SEI)
surface
resulted
lowest
overdischarge
highest
Coulombic
efficiency
under
same
conditions.
The
results
demonstrated
excellent
electrical
properties,
offering
new
perspective
design
sodium-ion
battery
electrodes.
