The
fast
OH-
transfer
between
hydroxide
layers
is
the
key
to
enhancing
charge
storage
efficiency
of
layered
double
hydroxides
(LDH)-based
supercapacitors
(SCs).
Constructing
interlayer
reactive
sites
in
LDH
much
expected
but
still
a
huge
challenge.
In
this
work,
CdS
nano-dots
(NDs)
are
introduced
interlayers
ultra-thin
NiFe-LDH
(denoted
CdSinter.
-NiFe-LDH),
promoting
ions
flow
for
higher
redox
activity.
excellent
performance
not
only
due
enlarged
layer
spacing
(from
0.70
0.81
nm)
also
stems
from
anchored
units
and
undamaged
original
structure
LDH,
which
contribute
improvement
diffusion
coefficient
(1.6
×
10-8
cm2
s-1
)
electrochemical
active
area
(601
mF
cm-2
better
than
that
NDs
on
surface
(2.1
10-9
350
).
champion
-NiFe-LDH
electrode
displays
high
capacitance
3330.0
F
g-1
at
1
A
retention
90.9%
10
,
with
(1966.6
Moreover,
assembled
asymmetric
SCs
(ASC)
device
demonstrate
an
outstanding
energy
density/power
density
(121.56
Wh
kg-1
/754.5
W
Dalton Transactions,
Год журнала:
2024,
Номер
53(25), С. 10403 - 10415
Опубликована: Янв. 1, 2024
Metal-organic
frameworks
(MOFs)
have
emerged
as
promising
electrode
materials
for
supercapacitors
(SCs)
due
to
their
highly
porous
structures,
tunable
chemical
compositions,
and
diverse
morphologies.
However,
applications
are
hindered
by
low
conductivity
poor
cycling
performance.
A
novel
approach
resolving
this
issue
involves
the
growth
of
layered
double
hydroxides
(LDHs)
using
MOFs
efficient
templates
or
precursors
material
preparation.
This
method
effectively
enhances
stability,
electrical
conductivity,
mass
transport
ability
MOFs.
The
MOF-derived
LDH
exhibits
a
well-defined
micro-/nano-structure,
facilitating
dispersion
active
sites
preventing
aggregation
LDHs.
Firstly,
paper
introduces
synthesis
strategies
converting
into
Subsequently,
recent
research
progress
in
LDHs
encompassing
pristine
powders,
composites,
LDH-based
arrays,
along
with
SCs,
is
overviewed.
Finally,
challenges
associated
potential
solutions
discussed.
ACS Applied Energy Materials,
Год журнала:
2024,
Номер
7(2), С. 469 - 478
Опубликована: Янв. 9, 2024
Under
the
background
of
current
promotion
global
green,
environmental
protection,
and
energy
conservation,
sustainable
conversion
low-cost
agricultural
waste
biomass
into
high
value-added
products
has
become
a
hot
topic.
Herein,
camellia
seed
shells
obtained
after
pressing
oil
are
used
to
prepare
porous
carbon
materials
with
specific
surface
area
(SSA)
excellent
electrochemical
properties
for
application
supercapacitors.
The
effects
different
chemical
activators
mass
ratios
on
pore
structure
shell-derived
activated
(CSSC)
were
investigated.
It
been
found
that
CSSC
by
KOH
presents
physical
performances,
structures
all
prepared
carbons
predominantly
combination
mesopores
micropores.
Especially,
owing
SSA
(1219
m2
g–1)
CSSC–KOH-1:3
material,
electrode
provides
an
outstanding
capacitance
305
F
g–1
at
density
0.5
A
g–1.
Furthermore,
symmetric
supercapacitor
assembled
electrodes
can
deliver
(15.37
W
h
kg–1)
power
(12.9
kW
kg–1),
it
still
maintain
cycling
stability
even
10,000
charge
discharge
processes.
Therefore,
this
work
significant
exploration
high-value
shell
preparation
high-performance
