Polymer Bulletin,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 31, 2024
After
careful
investigation,
we
realized
that
there
is
a
need
for
citation
and
permission
note
in
some
figures.The
synthesis
of
nanostructure
was
previously
published
by
Springer,
which
conducted
the
same
research
group.However,
this
correction
does
not
affect
results
significant
outcomes
present
study,
unique
completely
different
from
previous
work
[1].This
hereby
noted
clarity
completeness,
following
an
error
occurred
during
proof-reading
(Figs.
2,
4,
5,
6).
Heliyon,
Journal Year:
2024,
Volume and Issue:
11(1), P. e41261 - e41261
Published: Dec. 18, 2024
Electrochemical
energy
storage
plays
a
critical
role
in
the
transition
to
clean
energy.
With
growing
demand
for
efficient
and
sustainable
solutions,
supercapacitors
have
gained
significant
attention
due
their
high
specific
capacitance,
rapid
charge/discharge
capabilities,
long
lifespan,
safe
operation
across
various
temperatures,
minimal
maintenance
needs.
This
study
introduces
novel
approach
synthesis
of
high-performance
supercapacitor
electrodes
by
using
MnNi-MOF-74
as
precursor.
Bimetallic
Mn(OH)₂/Ni(OH)₂
hydroxides
(MnNi-x,
where
x
=
2,
6,
12)
with
tailored
morphologies
were
successfully
fabricated
treating
anchored
on
nickel
foam
different
concentrations
KOH.
Among
synthesized
samples,
MnNi-6
exhibited
best
performance,
remarkable
capacitance
4031.51
mF
cm⁻2
at
2
mA
cm⁻2,
attributed
its
surface
area
186
m2/g,
optimized
particle
size,
abundant
micropores.
Furthermore,
demonstrated
exceptional
thermal
stability,
positioning
it
promising
candidate
high-temperature
supercapacitors.
It
also
excellent
cycling
retaining
86.34
%
capacity
after
10,000
cycles
10
highlighting
durability.
Density
functional
theory
(DFT)
calculations
conducted
explore
quantum
bimetallic
hydroxide.
The
DFT
results
revealed
electron
density
near
Fermi
level,
which
directly
contributes
Mn:Ni
molar
ratio
3:1.
work
underscores
potential
MOF-derived
materials
route
development
electrodes,
paving
way
future
advances
electrochemical
technologies.
