Flexible
micro-supercapacitors
(µSCs),
as
one
of
the
emerging
energy
storage
systems,
face
challenges
fabricating
portable
and
bendable
electronic
devices.
Here,
using
a
scalable
environmentally
degradable
sequential
approach
interdigitated
electrodes
are
fabricated.
Graphene
oxide
(GO)
suspension
is
drop-casted
through
patterned
mask
onto
polyethylene
terephthalate
(PET)
substrate
to
initiate
exposed
laser
(450
nm,
1000
mW)
produce
conductive
porous
reduced
graphene
(rGO)
sheets.
To
take
advantage
pseudocapacitive
properties,
nickel
polyaniline
(PANI)
deposited
on
surface.
The
whole
process
needs
no
binder
or
use
any
mechanical
press
possesses
excellent
adhesion.
tests
performed
in
two
configuration
utilizing
KOH/PVA
gel
electrolyte.
So
ternary
PANI/β-Ni(OH)2/rGO
composite
has
advantages
prevent
swelling
shrinking
PANI
during
charge/discharge
processes.
Ni(OH)2
nanoparticles
function
pseudocapacitors
forms
cross-linked
network
between
rGO,
which
enhances
capacitance
reduces
internal
resistance.
presents
specific
13.5
mF/cm2
(1350
mF/cm3)
at
current
density
34
µA/cm2
along
with
76.5%
retention
for
consecutive
cycles
0.17
mA/cm2.
A
single
cell
can
run
small
toy
electric
motor.
Postcharging
antibacterials
have
shown
good
application
prospects
in
combating
bacterial
infections
through
electrical
interaction.
Herein,
manganese
oxide
nanosheets
situ
grown
on
carbon
fibers
(CM)
are
designed
to
perform
the
integration
of
mechanical
intervention
and
postcharging
therapy
for
efficient
killing.
This
electrode
disrupts
membranes
via
sharp-edged
microstructures.
After
charging
at
a
low
voltage
an
ultrashort
time,
charged
CM
affects
extracellular
electron
transfer
(EET)
bacteria
during
discharge
process
kill
bacteria.
Due
dual-antibacterial
mode,
after
−1
V
(vs
saturated
calomel
electrode,
SCE)
only
50.4
±
3
s,
lethality
rates
against
Escherichia
coli
Staphylococcus
aureus
within
0.5
h
both
exceed
98%.
Our
developed
ultrafast
negatively
exhibits
high
antibacterial
activity
cytotoxicity
fibroblast
cells,
providing
non-antibiotic
approach
combat
infection.
Chemical Engineering Journal,
Год журнала:
2024,
Номер
487, С. 150384 - 150384
Опубликована: Март 21, 2024
The
imperative
development
of
high-performance
planar
micro-batteries
featuring
high-capacity
electrodes
and
environmentally
safer,
cost-effective
systems
is
crucial
for
powering
forthcoming
smart,
miniaturized
portable
electronic
devices.
In
alignment
with
this
necessity,
study
centers
on
achieving
cathode
materials.
This
involves
the
pre-intercalation
polyaniline
water
into
V2O5
nanowires
to
enhance
capacity,
applied
in
conjunction
Zn
anodes
within
a
device
structure
boost
charge
storage
performance.
presented
straightforward
strategy
demonstrated
not
only
effectively
increase
capacities
from
235
mAh/g
384
at
200
mA/g
but
also
reduce
pre-activation
process.
Consequently,
Zn-ion
obtained,
cathodes,
provide
substantial
areal
capacity
409
μAh/cm2
exhibit
notable
peak
energy
density
power
306.7
μWh/cm2
3.44
mW/cm2,
respectively.
Additionally,
micro-battery
demonstrates
slow
self-discharge
voltage
response,
approximately
80
%
retention
even
after
h.
work
proposes
an
effective
electrochemical
performance
micro-batteries,
critical
advancement
advanced
electronics.
Nano Letters,
Год журнала:
2024,
Номер
24(35), С. 10874 - 10882
Опубликована: Авг. 20, 2024
The
downsizing
of
microscale
energy
storage
devices
plays
a
crucial
role
in
powering
modern
emerging
devices.
Therefore,
the
scientific
focus
on
developing
high-performance
microdevices,
balancing
density
and
power
density,
becomes
essential.
In
this
context,
we
explore
an
advanced
Microplotter
technique
to
fabricate
hybrid
planar
Zn-ion
microcapacitors
(ZIMCs)
that
exhibit
dual
charge
characteristics,
with
electrical
double
layer
capacitor
type
activated
carbon
anode
battery
VO2
(B)
cathode,
aiming
achieve
surpassing
supercapacitors
exceeding
batteries.
Effective
loading
cathode
electrode
materials
combined
onto
confined
microelectrodes
not
only
provides
reversible
Zn2+
performance
but
also
mitigates
dendrite
formation.
This
results
superior
performance,
including
areal
energies
2.34
μWh/cm2
(at
74.76
μW/cm2)
0.94
753.12
μW/cm2),
zinc
nanoparticle
based
ZIMCs,
ensures
stable
capacity
retention
87%
even
after
1000
cycles
free
from
any
unwanted
dendrites.
Consequently,
approach
is
directed
toward
development
ZIMCs
by
exploring
high-capacity
for
efficient
utilization
achieving
maximum
possible
capacities
within
constraints
limited
device
footprint.
Batteries,
Год журнала:
2024,
Номер
10(9), С. 317 - 317
Опубликована: Сен. 7, 2024
Miniaturized
energy
storage
devices,
such
as
electrostatic
nanocapacitors
and
electrochemical
micro-supercapacitors
(MSCs),
are
important
components
in
on-chip
supply
systems,
facilitating
the
development
of
autonomous
microelectronic
devices
with
enhanced
performance
efficiency.
The
heavily
relies
on
electrode
materials,
necessitating
continuous
advancements
material
design
synthesis.
This
review
provides
an
overview
recent
developments
materials
for
MSCs
(micro-/nano-)
capacitors,
focusing
enhancing
density,
power
device
stability.
begins
by
discussing
fundamental
requirements
MSCs,
including
high
specific
surface
area,
good
conductivity,
excellent
Subsequently,
various
categories
evaluated
terms
their
charge
mechanisms,
performance,
compatibility
fabrication
processes.
Furthermore,
strategies
to
enhance
discussed,
nanostructuring,
doping,
heteroatom
incorporation,
hybridization
other
capacitive
configurations.
