Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 22, 2024
As
a
unique
pseudocapacitive
material,
the
heterojunction-structured
CuO@Cu
combines
high
conductivity
of
substrate
Cu
and
capacity
active
CuO
together
for
structure-integral
electrodes,
however,
its
structural
optimization
improved
are
still
main
challenges
so
far.
In
this
study,
an
initial
surface
etching
copper
foam
(CF)
is
adopted
to
construct
primary
heterostructure
nanowires@CF
(CuO
NW@CF),
then,
decoration
NW@CF
via
deposition
cerium-2-methylimidazole
based
metal-organic
frameworks
(Ce-2MI)
finally
results
in
current-collector-/binder-free
electrodes
hierarchical
Ce-2MI@CuO
NW@CF.
Compared
properties
NW@CF,
both
introducing
Ce-ion
sites
enriched
lattice
oxygen
vacancies
cooperatively
endow
with
ultrahigh
specific
capacitance
excellent
cycling
stability.
Within
potential
window
1.6
V,
asymmetric
supercapacitor
devices
activated
carbon//Ce-2MI@CuO
acquire
energy
density
56.8
Wh
kg
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(48)
Published: Oct. 6, 2024
Abstract
Nowadays,
the
demand
for
portable
micro‐energy
storage
devices
with
high
energy
density
and
scalable
printing
cost‐effective
fabrication
microsupercapacitors
(MSC)
are
essential.
Furthermore,
urgent
need
this
high‐performance
MSC
to
meet
all
industrial
sector
requirements
very
challenging.
Herein,
screen
printable
is
demonstrated
by
using
copper
hexacyanocobaltate
(CuHCCo)
derived
(Cu,Co)Se
2
nanocubes
as
positive
electrode
Ti‐MXene
(Ti
3
C
T
x
)
negative
electrode.
The
prepared
battery
type
greatly
enhance
electrochemical
activity
active
surface
area.
As
a
result,
it
delivers
specific
capacity
of
602
g
−1
at
current
1
A
.
fabricated
asymmetric
has
enhanced
ion‐to‐electron
transfer
in
microelectrodes
numerous
sites
delivered
areal
capacitance
58
mA
cm
−2
wide
potential
window.
device
gives
8.06
µWh
power
5
mW
These
results
demonstrate
new
strategies
fabricating
materials
show
promising
microscale
miniaturized
sustainable
self‐powered
compatibility.
