Vanadium-based
materials,
which
offer
multiple
oxidation
states
and
rich
redox
reactions
in
zinc-ion
batteries
(ZIBs),
have
gained
substantial
attention.
However,
achieving
green
efficient
preparation
of
vanadium
oxides-based
materials
featured
with
a
controlled
content
different
heterovalent
remains
significant
challenge.
Herein,
vanadium-supramolecular
flower-shaped
material
(VSF)
was
prepared
using
NH4VO3
as
metal
center
hexamethylenetetramine
organic
ligand
aqueous
solution.
The
optimal
ratio
(PVSF)
after
controlling
VSF
presintering
is
2/1
(V5+/V4+).
Employing
PVSF-2/1
cathode
ZIBs
can
achieve
high
specific
capacity
398.9
mAh
g–1
at
0.2
A
g–1,
increased
by
3.5
times
compared
that
pure
VO2
V2O5,
respectively.
After
2000
cycles,
it
still
delivers
225
5.0
g–1.
Zn∥PVSF-2/1
pouch
cells
were
assembled
satisfactory
339
current
excellent
performance
ascribed
to
regulation
coordinated
promotion
states.
structural
pathways
corresponding
V5+
act
Zn2+
transport
channels
increase
capability.
V4+
cause
charge
density
distribution
the
V-O
lattice
layer
provide
abundant
active
sites
for
adsorption/desorption
process
Zn2+.
Aqueous
zinc
ion
batteries
(AZIBs)
featuring
low
cost
and
high
safety
are
attracting
considerable
interest.
More
recently,
ammonium
vanadate,
characterized
by
its
specific
capacity,
is
regarded
as
a
promising
cathode
material
for
AZIBs.
However,
their
unstable
layered
structures
sluggish
reaction
kinetics
limit
further
development.
To
overcome
these
limitations,
metal
ions
(Na+
Zn2+)
pre-intercalated
into
vanadate
to
modify
the
interlayer
spacing
enhance
charge
transfer
kinetics.
Additionally,
impact
of
different
on
structure
properties
systematically
investigated.
Furthermore,
we
successfully
synthesized
materials
(Na0.13(NH4)0.48V2O5·0.6H2O,
Na0.13-NVO)
stable
nanostructures
optimizing
pre-embedded
Na+
content.
In
this
case,
sodium
could
expand
layer
(9.14
Å),
reduce
electrostatic
interaction
Zn2+
with
V–O
framework,
boost
diffusion
rate.
Benefitting
from
strengths,
Na0.13-NVO
electrode
exhibits
capacity
365.4
mAh
g–1
at
0.5
A
g–1,
along
good
cycling
stability
98.1%
retention
over
2000
cycles
5
g–1.
This
work
supplies
insights
designing
aids
development
high-performance
AZIB
cathodes.
Aqueous
zinc-ion
batteries
(AZIBs)
have
garnered
widespread
attention
due
to
their
promising
development
and
application
prospects.
However,
progress
of
AZIBs
has
been
hindered
by
zinc
(Zn)
dendrites
side
reactions
at
the
electrode-electrolyte
interface
(EEI).
In
particular,
large
uneven
pores
commercial
glass
fiber
(GF)
separators
lead
nonuniform
Zn
Vanadium-based
materials,
which
offer
multiple
oxidation
states
and
rich
redox
reactions
in
zinc-ion
batteries
(ZIBs),
have
gained
substantial
attention.
However,
achieving
green
efficient
preparation
of
vanadium
oxides-based
materials
featured
with
a
controlled
content
different
heterovalent
remains
significant
challenge.
Herein,
vanadium-supramolecular
flower-shaped
material
(VSF)
was
prepared
using
NH4VO3
as
metal
center
hexamethylenetetramine
organic
ligand
aqueous
solution.
The
optimal
ratio
(PVSF)
after
controlling
VSF
presintering
is
2/1
(V5+/V4+).
Employing
PVSF-2/1
cathode
ZIBs
can
achieve
high
specific
capacity
398.9
mAh
g–1
at
0.2
A
g–1,
increased
by
3.5
times
compared
that
pure
VO2
V2O5,
respectively.
After
2000
cycles,
it
still
delivers
225
5.0
g–1.
Zn∥PVSF-2/1
pouch
cells
were
assembled
satisfactory
339
current
excellent
performance
ascribed
to
regulation
coordinated
promotion
states.
structural
pathways
corresponding
V5+
act
Zn2+
transport
channels
increase
capability.
V4+
cause
charge
density
distribution
the
V-O
lattice
layer
provide
abundant
active
sites
for
adsorption/desorption
process
Zn2+.
