ACS Applied Nano Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 18, 2024
In
this
work,
an
(NH4)0.5V2O5
nanobelt
(NVO)
was
prepared
by
a
facile
hydrothermal
reaction
using
NH4VO3
as
the
precursor
and
oxalic
acid
(C2H2O4)
reducing
agent.
The
crystal
structure
quantity
of
NH4+
intercalated
for
NVO
can
be
adjusted
via
postheat
treatment,
resulting
in
variable
K+
storage
property
when
utilized
cathode
K-ion
batteries
(KIBs).
Therein,
NVO-150
°C
obtained
exhibits
optimal
capacity
(86.8
mA
h/g
at
first
discharge
74.0
50th
cycle
under
50
mA/g
between
1.5
3.8
V
vs
K/K+)
rate
capability
(58.4
500
mA/g),
which
ascribed
to
appropriate
structural
fine-tuning
toward
NVO,
increasing
its
active
sites
storage.
Furthermore,
uniformly
combined
with
rGO
one-pot
process
through
bridging
effect
cetyltrimethylammonium
bromide.
acquired
NVO-rGO
also
delivers
significantly
improved
performance
(89.7
initial
71.9
after
cycles;
56.5
mA/g)
compared
benefits
from
good
conductivity
separation
function
rGO,
promoting
fast
transport
electrons
K+.
Both
treatment
introduction
are
feasible
enhance
NVO.
This
study
proposed
effective
modification
strategies
optimize
potential
KIB
application.
Advanced Sustainable Systems,
Год журнала:
2024,
Номер
unknown
Опубликована: Май 1, 2024
Abstract
Aqueous
electrolytes
are
praised
for
their
inherent
safety,
cost‐effectiveness,
and
minimal
environmental
impact,
making
aqueous
potassium‐ion
batteries
(APIBs)
a
viable
alternative
sustainable
eco‐friendly
energy
solutions.
Researchers
have
endeavored
to
anode
materials
that
align
with
the
unique
requirements
of
electrolytes,
some
proud
achievements
made.
The
research
about
APIBs
has
focused
on
organic
polyanionic
compounds,
both
exhibiting
desirable
hydrated
potassium
storage
performance,
in
recent
years,
development
metal
compounds
alloy‐based
high
theoretical
capacities.
However,
faces
narrow
electrochemical
stability
window
(ESW)
caused
by
volume
expansion
problems
due
large
radius
ions,
which
prevents
them
from
appreciable
capacity
satisfactory
cycling
stability.
This
review
meticulously
delineates
latest
advancements
representative
introduces
several
common
effective
improvement
strategies
them.
focus
is
advantages
bottlenecks
faced
different
types
materials,
culminating
proposed
methodology
enhance
efficacy.
endeavors
furnish
novel
perspectives
pragmatic
deployment
anodes.
ACS Applied Nano Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 18, 2024
In
this
work,
an
(NH4)0.5V2O5
nanobelt
(NVO)
was
prepared
by
a
facile
hydrothermal
reaction
using
NH4VO3
as
the
precursor
and
oxalic
acid
(C2H2O4)
reducing
agent.
The
crystal
structure
quantity
of
NH4+
intercalated
for
NVO
can
be
adjusted
via
postheat
treatment,
resulting
in
variable
K+
storage
property
when
utilized
cathode
K-ion
batteries
(KIBs).
Therein,
NVO-150
°C
obtained
exhibits
optimal
capacity
(86.8
mA
h/g
at
first
discharge
74.0
50th
cycle
under
50
mA/g
between
1.5
3.8
V
vs
K/K+)
rate
capability
(58.4
500
mA/g),
which
ascribed
to
appropriate
structural
fine-tuning
toward
NVO,
increasing
its
active
sites
storage.
Furthermore,
uniformly
combined
with
rGO
one-pot
process
through
bridging
effect
cetyltrimethylammonium
bromide.
acquired
NVO-rGO
also
delivers
significantly
improved
performance
(89.7
initial
71.9
after
cycles;
56.5
mA/g)
compared
benefits
from
good
conductivity
separation
function
rGO,
promoting
fast
transport
electrons
K+.
Both
treatment
introduction
are
feasible
enhance
NVO.
This
study
proposed
effective
modification
strategies
optimize
potential
KIB
application.
