Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 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.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 29, 2025
Abstract
The
susceptibility
to
freezing
of
the
electrolyte
and
mismatched
cathode
make
aqueous
zinc‐ion
hybrid
supercapacitors
(ZHSCs)
have
inferior
electrochemical
performance
at
low
temperature.
Herein,
a
novel
freeze‐tolerant
hydrogel
(CEEZ)
matched
graphene/porous
carbon/cellulose
nanofibers
(GPCN)
are
respectively
fabricated
via
chemical
cross‐linking
two‐step
process
assemble
ZHSCs.
prepared
electrode
has
highly
porous
structure,
abundant
edge
active
sites,
increased
interlayer
spacing,
which
collectively
reduces
ion
transport
complexity
enhances
contact
area
with
electrolyte,
promoting
rapid
ionic
conduction
pathways.
For
CEEZ,
use
ethylene
glycol
saturated
vapor
pressure
water,
thereby
enhancing
frost
resistance
electrolyte.
Consequently,
ZHSCs
assembled
from
GPCN,
Zn
anode
exhibit
excellent
specific
capacitances
1.11
F
cm⁻
2
(21.35
3
)
20
°C
0.74
(14.23
−20
°C.
These
results
demonstrate
promising
application
potential
these
in
cold
environments
while
maintaining
impressive
energy
storage
capabilities.
This
work
provides
valuable
insights
robust
strategy
for
design
high‐performance
low‐temperature
ZHSCs,
their
practical
applicability
renewable
systems.
Battery energy,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 11, 2025
ABSTRACT
MXene
materials
exhibit
outstanding
pseudocapacitive
performance,
holding
great
potential
for
application
in
zinc‐ion
hybrid
supercapacitors
(Zn‐HSCs).
Exploring
the
effect
of
surface
terminal
regulation
on
performance
is
crucial
yet
challenging.
In
this
study,
phosphorus‐terminal
groups
(P─C
and
P─O)
with
a
P
concentration
2.71
at%
are
successfully
tailored
interlayer
spacing
enhanced
during
ultraviolet
light
irradiation
process
Ti
3
C
2
T
x
MXene,
which
first
report
photoinduced
P‐doped
modification.
Density
functional
theory
calculations
show
that
doping
more
likely
to
be
adsorbed
by
─O
than
replace
vacancy,
stability
electrode
can
improved
introduction
phosphorus
terminal.
The
resulting
shows
significant
increased
pseudocapacitance
achieving
superior
results
compared
traditional
resistance
furnace
heating
methods.
specific
capacitance
achieves
500.5
F
g
−1
,
due
─P
group
atom
double
reoxidation
sites.
Furthermore,
Zn‐HSC
device
exhibits
207.4
energy
densities
56.5
Wh
kg
.
This
study
also
provides
valuable
insights
reference
realization
other
materials.
Nano Letters,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 14, 2025
Polymer
incorporation
has
been
proven
effective
to
enhance
the
mechanical
strength
of
MXene
fibers
via
interfacial
cross-linking,
yet
simultaneous
improvement
in
electrochemical
performance,
particularly
output
capacitance
and
high
rate
capability,
remains
a
challenge,
major
obstacle
is
identified
as
sluggish
ion
diffusion
kinetics.
Herein,
interlayer
manipulation
Ti3C2TX
fiber
proposed,
roles
substitutional
groups
celluloses
are
examined.
The
addition
cellulose
can
obviously
improve
spinnability
dope
effectively
bridge
adjacent
nanosheets
hydrogen
bonds.
Moreover,
hydroxyethyl
with
suitable
group
size
moderate
adsorption
ability
preferred
for
diminishing
steric
effect
facilitating
rapid
proton
transport.
Simultaneous
improvements
(1531
F
cm-3
at
2
A
cm-3)
(∼76
MPa)
achieved
optimized
M-HEC-1.0%
together
superior
capability
retaining
89.2%
15
cm-3.
