Transitional
bimetallic
sulfides
are
attractive
electrode
materials
for
supercapacitors.
However,
designing
and
preparing
efficient
transitional
with
superb
capacitance,
high
energy
density,
good
cycling
stability
by
simple
methods
still
facing
great
challenge.
Herein,
a
cauliflower-like
CoNi2S4
microsphere
structure
is
synthesized
facile
solvothermal
method.
The
exhibits
an
exceptional
specific
capacity
up
to
2384
F
g-1
at
1
A
g-1.
constructed
CoNi2S4//PC
asymmetric
supercapacitor
extremely
density
of
71.97
Wh
kg-1
the
375
W
kg-1,
remarkable
retention
rate
88.43%
after
5000
cycles
5
Inorganic Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 29, 2025
Metal-organic
frameworks
(MOFs)
have
garnered
increasing
interest
due
to
their
porous
structure,
high
surface
area,
and
rich
redox
active
metal
ions
that
can
be
exploited
as
good
electrode
materials
for
electrochemical
energy
storage.
Herein,
nickel-based
MOFs
with
different
morphological
structures
of
solid
spheres
(Ni-BTC-0),
hollow
spheroidal
microparticles
(Ni-BTC-5),
(Ni-BTC-10)
been
facilely
synthesized
by
using
water
a
regulator.
Among
them,
the
unique
structure
Ni-BTC-5
largest
area
provide
abundant
channels
fast
electron
electrolyte
transport
well
expose
more
sites.
As
result,
displays
higher
specific
capacity
177.8
mA
h/g
than
Ni-BTC-0
(110.6
h/g)
Ni-BTC-10
(129.9
electrodes
at
current
density
1.0
A/g.
Furthermore,
assembled
aqueous
nickel-zinc
battery
based
on
cathode
Zn
anode
delivers
210.6
h/g,
remarkable
362.3
W
h/kg,
retention
rate
80.2%
over
3000
cycles.
This
study
provides
new
way
regulate
MOFs,
also
demonstrating
regulating
is
one
effective
approaches
improve
storage
performances.
Nanoscale,
Journal Year:
2024,
Volume and Issue:
16(36), P. 16933 - 16941
Published: Jan. 1, 2024
Ni3(NO3)2(OH)4
has
a
high
theoretical
specific
capacitance,
low
cost,
and
environmental
friendliness,
making
it
promising
electrode
material.
Specifically,
electrodes
have
larger
layer
spacing
(c
=
6.898
Å)
than
Ni(OH)2
since
NO3-
much
ionic
radius
OH-.
The
stores
more
electrolyte
ions,
significantly
improving
the
electrochemical
activity
of
electrodes.
Additionally,
interlayer
can
enhance
structural
stability
Ni3(NO3)2(OH)4.
However,
higher
molar
mass
Ni(OH)2,
lower
capacity.
Consequently,
not
been
used
in
zinc-based
alkaline
batteries.
Studies
showed
that
doping
could
performance
materials.
Therefore,
this
study
simple
solvothermal
reaction
to
synthesize
yttrium-doped
(Y-Ni3(NO3)2(OH)4),
assembling
Y-Ni3(NO3)2(OH)4//Zn
battery
for
testing.
Y-Ni3(NO3)2(OH)4
served
as
cathode
battery.
analysis
yttrium
(Y)
increased
surface
area
pore
size
significantly.
improved
active
material
utilization,
abundant
mesopores
facilitated
OH-
transport,
substantially
enhancing
battery's
capacity
energy
density.
Ultimately,
discharge
advanced
reached
177.97
mA
h
g-1
at
current
density
4
A
g-1,
nearly
doubling
earlier
Ni3(NO3)2(OH)4//Zn
(103.59
g-1).
