Ferrocyanide “Skin”-Mediated Anticatalysis: Mitigating Self-Discharge in Aqueous Electrochemical Devices
Journal of the American Chemical Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 12, 2025
The
interest
in
aqueous
energy
storage
devices
is
surging
due
to
their
exceptional
safety
profile.
However,
systems,
interfacial
side
reactions,
predominantly
attributed
the
oxygen
evolution
reaction
(OER),
result
significant
self-discharge,
which
concomitant
with
deterioration
of
both
voltage
and
capacity.
Herein,
we
propose
construction
a
ferrocyanide
"skin"
on
transition
metal
compounds
(TMCs)
mitigate
this
issue.
This
engineered
creates
Fe–C≡N
terminations,
initiating
new
pathway
featured
by
bonding
process
N–O
N–H
bonds.
presents
barrier,
effectively
shielding
active
sites
for
OER
from
H2O
molecules
hydroxyl
ions.
Taking
NiO
as
an
example,
suppresses
undesired
phase
NiOOH
Ni(OH)2
during
idling
fully
charged
electrode,
enabling
as-modified
electrode
achieve
remarkable
retention
80.0%
after
1
week
within
device.
Furthermore,
concept
demonstrates
extensive
applicability,
extending
range
TMC
materials,
including
but
not
limited
manganese
oxide,
vanadium
nickel
cobalt
oxide.
These
findings
highlight
efficacy
design
strategy
broadly
applicable
paradigm
suppressing
H2O-induced
undesirable
transitions
devices.
Язык: Английский
Hierarchically Porous Wearable Composites for High‐Performance Stretchable Supercapacitors
Advanced Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 25, 2025
Abstract
With
the
rapid
development
of
wearable
electronic
devices,
demand
for
flexible,
durable,
and
high‐performance
energy
storage
systems
has
increased
significantly.
Nevertheless,
maintaining
stable
electrochemical
performance
during
stretching
while
ensuring
high
stretchability
mechanical
stability
remains
a
challenge.
Herein,
this
study
proposes
novel
type
stretchable
supercapacitors
made
from
carbon
nanotube
(CNT)
styrene‐butadiene‐styrene
(SBS)
composite
scaffolds
prepared
on
pre‐stretched
fabrics
using
breath
figure
method.
Hydrothermal
treatment
is
then
performed
to
grow
NiCo‐LDH
at
treated
fabrics.
This
method
induces
formation
hierarchically
porous
structure
under
humidity
conditions,
controls
hydrothermal
growth
in
CNT/SBS
scaffold,
significantly
enhances
stability.
The
supercapacitor
demonstrates
remarkable
retention
94%
capacitance
80%
tensile
strain
sustains
small
8%
degradation
over
20
000
charge–discharge
cycles,
achieving
specific
4948
mF
cm⁻
2
mA
.
device
an
density
801.6
µWh
(400.6
Wh
kg⁻¹)
exhibits
excellent
power
3.5
mW
(1749.5
W
kg⁻¹).
These
properties
make
potential
next‐generation
smart
wearables
electronics.
Язык: Английский
Boosting Zn‐Ion Storage Behavior of Pre‐Intercalated MXene with Black Phosphorus toward Self‐Powered Systems
Advanced Science,
Год журнала:
2024,
Номер
11(40)
Опубликована: Авг. 29, 2024
Abstract
MXene‐based
Zn‐ion
capacitors
(ZICs)
with
adsorption‐type
and
battery‐type
electrodes
demonstrate
high
energy
storage
anti‐self‐discharge
capabilities,
potentially
being
paired
triboelectric
nanogenerators
(TENGs)
to
construct
self‐powered
systems.
Nevertheless,
inadequate
interlayer
spacing,
deficient
active
sites,
compact
self‐restacking
of
MXene
flakes
pose
hurdles
for
ZICs,
limiting
their
applications.
Herein,
black
phosphorus
(BP)‐Zn‐MXene
hybrid
is
formulated
ZIC
via
a
two‐step
molecular
engineering
strategy
pre‐intercalation
BP
nanosheet
assembly.
Zn
ions
as
intercalators
induce
cross‐linking
expandable
spacing
serve
scaffolds
nanosheets,
thereby
providing
sufficient
accessible
sites
efficient
migration
routes
enhanced
storage.
The
density
functional
theory
calculations
affirm
that
zinc
adsorption
diffusion
kinetics
are
significantly
improved
in
the
hybrid.
A
wearable
delivers
competitive
areal
426.3
µWh
cm
−2
ultra‐low
self‐discharge
rate
7.0
mV
h
−1
,
achieving
remarkable
electrochemical
matching
TENGs
terms
low
loss,
matched
capacity,
fast
resultant
system
efficiently
collects
stores
from
human
motion
power
microelectronics.
This
work
advances
ZICs
synergy
TENG
Язык: Английский
Multiscale investigation of mechanical degradation in Ti3C2O2 assemblies and its Mitigation via black phosphorus integration
Materials & Design,
Год журнала:
2025,
Номер
unknown, С. 113920 - 113920
Опубликована: Апрель 1, 2025
Язык: Английский
Advanced carbon materials for efficient zinc ion storage: Structures, mechanisms and prospects
Energy storage materials,
Год журнала:
2024,
Номер
74, С. 103945 - 103945
Опубликована: Дек. 7, 2024
Язык: Английский
Wearable, Recoverable, and Implantable Energy Storage Devices With Heterostructure Porous COF‐5/Ti3C2Tx Cathode for High‐performance Aqueous Zn‐ion Hybrid Capacitor
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 31, 2024
Abstract
With
the
continuous
advancement
of
internet
things
and
information
technology,
implantable
bioelectronics
have
attracted
considerable
attention
for
effective
health
monitoring
improvement
vital
signs.
Nevertheless,
conventional
power
sources
are
typically
plagued
by
short
lifetimes,
inflexible
packaging
modalities,
toxic
corrosion
risks
that
damage
soft
tissues.
In
this
study,
a
biocompatible
quasi‐solid‐state
aqueous
Zn‐ion
hybrid
capacitor
(AZIHCs)
is
developed
with
high
energy
density
durability.
The
heterostructured
porous
COF‐5/Ti
3
C
2
T
x
cathode
exhibited
enhanced
interface
charge
transfer
accelerated
Zn
2+
migration
kinetics,
delivering
an
outstanding
areal
capacitance
952
mF
cm
−2
160
mWh
.
Furthermore,
AZIHCs
demonstrated
reversible
capacity
524
cm⁻
,
completely
damaged
device
can
still
electronics
after
being
reconnected
using
superior
silk
nanofiber‐containing
zwitterionic
hydrogel
electrolyte.
These
implanted
AZIHCs,
good
biocompatibility,
showed
substantial
deformation
stability
80.2%
2000
cycles
when
firmly
adhered
to
tissues,
illustrating
impressively
stable
performance
in
tissue
fluid
or
wetted
surface
efficient
supply.
This
study
provides
novel
approach
high‐performance
storage
devices
multifunctional
wearable
applications
organism
patches
vivo
detection.
Язык: Английский