Metal
sulfides,
characterized
by
high
crystalline
stability
and
narrowed
band
gap,
are
recognized
as
effective
electrode
materials
for
energy
storage
in
alkaline
environments.
This
study
enhances
the
surface
activity
Co9S8/Ni3S2
hollow
nanorod
arrays
incorporating
phosphorus
(P)
doping.
In
situ
Raman
spectroscopy
confirms
that
P
doping
facilitates
rapid
reconstruction
media,
resulting
substantial
amounts
of
oxyhydroxides
significantly
enhance
density
supercapacitors.
The
optimized
P–Co9S8/Ni3S2
(1
h)
demonstrates
a
4.56-fold
increase
performance
over
original
Co9S8/Ni3S2,
achieving
capacitance
20.5
F·cm–2
at
3
mA·cm–2
2
M
KOH.
hybrid
supercapacitor
device
assembled
with
activated
carbon
achieves
an
1.73
mWh
cm–2
power
4.95
mW
cm–2,
showcasing
cycling
life
84.6%
capacity
retention
after
10,000
cycles.
work
effectively
reconstructs
oxyhydroxide
species
on
electrodes
environments
through
engineering,
providing
valuable
guidance
design
reconstructions
metal
sulfide
using
atom
engineering.
Nano Letters,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 10, 2025
Realizing
ultrahigh
area
capacitance
based
on
suitable
electrodes
is
a
challenge
for
supercapacitors.
In
this
work,
an
electrode
designed
consisting
of
Co9S8
nanotubes
and
NiWO4
nanoparticles
(named
Co9S8@NiWO4)
fabricated
by
hydrothermal
process.
The
Co9S8@NiWO4
realizes
record
18.8
F
cm-2
at
current
density
5
mA
among
the
reports
in
literature.
corresponding
asymmetric
supercapacitor
shows
high
energy
0.48
mW
h
2.42
superior
cyclic
stability
79.2%
retention
over
7000
cycles
10
cm-2.
great
promotion
performance
synergistically
attributed
to
intrinsic
theoretical
capacitances
compounds,
abundance
polyvalent
states,
improved
conductivity,
increases
reaction
sites
rate
electrode.
This
work
provides
new
route
designing
highly
efficient
developing
supercapacitors
with
practical
applications.
