Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 20, 2024
Abstract
Advanced
electrode
materials
with
simple
manufacturing
processes
and
wide
voltage
windows
are
needed
for
the
commercialization
of
high
energy
density
supercapacitors.
Herein,
a
facile
method
is
presented
fabricating
self‐supporting
anodes
cathodes
quasi‐solid‐state
asymmetric
supercapacitors
(QASCs)
by
hydrothermally
reacting
2‐thiobarbituric
acid
(TBA)
Fe
foam
(IF)
Co
(CF),
yielding
FeTBA
4
/FeOOH/IF
9
S
8
/CF
electrodes,
respectively.
Due
to
perfect
match
between
two
redox‐active
TBA
ligands
in
,
2D
ultrathin
nanosheet
structure
/FeOOH/IF,
multiple
pairs
reversible
redox
reactions
suppressing
water
splitting,
configured
/CF//FeTBA
QASC
device
delivers
outstanding
performance.
The
possesses
operating
window
1.6
V,
leading
82.64
Wh
kg
−1
at
486.38
W
an
equally
impressive
35.36
4595.92
.
Furthermore,
98.5%
capacitance
retention
realized
after
10000
charging–discharging
cycles.
Impressively,
functional
theory
(DFT)
calculations
reveal
unique
pseudocapacitive
on
surface
electrodes.
Importantly,
this
work
guides
development
high‐energy‐density
via
matching
electrodes
use
complex
Dalton Transactions,
Journal Year:
2024,
Volume and Issue:
53(26), P. 10770 - 10804
Published: Jan. 1, 2024
Prussian
blue
and
analogues
have
attracted
increasing
attention
as
versatile
framework
materials
with
a
wide
range
of
applications
in
catalysis,
energy
conversion
storage,
biomedical
environmental
fields.
The
rational
design
of
a
porous
core–shell
heterostructure
with
open
spaces
is
an
effective
strategy
to
mitigate
the
aggregation
and
volume
expansion
active
nanoelectrodes
during
charging/discharging
processes.
Herein,
leaf-like
CoNiSe2/NC@Ni3(PO4)2
hierarchical
pores
in
situ
grown
on
activated
carbon
cloth
(CC)
as
free-standing
electrode
for
flexible
supercapacitors.
collectively
formed
by
both
interspaces
among
adjacent
structures
channels
vertically
crossed
Ni3(PO4)2
nanosheets
not
only
significantly
enhance
electrolyte
contact
areas
promote
rapid
penetration
ion
diffusion
but
also
effectively
buffer
agglomeration
nanoelectrode.
Such
unique
spatial
arrangement
structure
endow
CoNiSe2/NC@Ni3(PO4)2/CC
high
specific
capacitance
2505
F
g–1
(1
A
g–1)
extended
cycle
life
91.1%
capacity
retention
after
10,000
cycles,
surpassing
most
reported
electrodes
similar
compositions.
combined
experimental
band
analysis
signifies
that
integrated
CoNiSe2/Ni3(PO4)2
interfaces
featuring
optimized
electronic
accelerate
charge
transport
improve
redox-reaction
kinetics,
resulting
significant
enhancement
electrochemical
performance
compared
two
individual
components.
Small,
Journal Year:
2024,
Volume and Issue:
20(44)
Published: July 4, 2024
The
construction
of
novel
structured
Prussian
blue
analogs
(PBAs)
by
chemical
etching
has
attracted
the
most
attention
to
PBA
derivatives
with
outstanding
performance.
In
this
work,
unprecedented
orthogonal
frustums
are
first
prepared
from
nanocubes
through
a
selective
approach
using
trisodium
citrate
as
an
etchant.
ions
can
chelate
nickel
species
edges/corners
NiCo-PBA
and
then
disintegrate
NiCo-PBAs
resulting
in
generation
frustums.
derived
CoNi
