Advanced Functional Materials,
Год журнала:
2023,
Номер
34(2)
Опубликована: Сен. 29, 2023
Abstract
Atmospheric
moisture
accelerates
the
triboelectric
charge
transport
and
dissipation
in
nanogenerator
(TENG).
However,
output
of
polyvinyl
alcohol
(PVA)‐based
humidity‐resistant
TENG
is
still
limited
under
high
humidity
suffers
from
swelling
problem
practical
application.
In
this
paper,
a
swelling‐
high‐performance
using
polyacrylonitrile/polyvinyl
alcohol‐calcium
chloride
(PAN/PVA‐CaCl
2
)
composite
film
(PPCa‐TENG)
designed
for
seawater
desalination.
The
PAN/PVA‐CaCl
films
exhibit
superior
water
uptake
speed,
resistance,
mechanical
tribological
properties
compared
with
other
prepared
membranes
at
relative
(RH).
maximum
short‐circuit
current
(
I
sc
voltage
V
o
PPCa‐TENG
can
reach
52.04
µA
941
75%
RH,
respectively,
increasing
power
PVA‐based
by
about
17.39
times.
Kelvin
probe
force
microscopy
(KPFM)
results
suggest
that
demonstrates
higher
tribopositivity.
Furthermore,
applied
as
an
effective,
economical
source
desalination,
energy
consumption
only
0.19
kWh
m
−3
.
This
number
remarkably
lower
than
desalination
powered
conventional
direct‐current
supplies
reported
previous
work.
paper
provides
feasible,
effective
method
design
performance
high‐humidity
conditions.
ACS Nano,
Год журнала:
2024,
Номер
18(4), С. 3720 - 3732
Опубликована: Янв. 18, 2024
Piezoelectric
hydrogel
sensors
are
becoming
increasingly
popular
for
wearable
sensing
applications
due
to
their
high
sensitivity,
self-powered
performance,
and
simple
preparation
process.
However,
conventional
piezoelectric
hydrogels
lack
antifreezing
properties
thus
confronted
with
the
liability
of
rupture
in
low
temperatures
owing
use
water
as
dispersion
medium.
Herein,
a
kind
organohydrogel
that
integrates
piezoelectricity,
low-temperature
tolerance,
mechanical
robustness,
stable
electrical
performance
is
reported
by
using
poly(vinylidene
fluoride)
(PVDF),
acrylonitrile
(AN),
acrylamide
(AAm),
Advanced Functional Materials,
Год журнала:
2023,
Номер
33(37)
Опубликована: Май 14, 2023
Abstract
Developing
versatile
and
high
sensitivity
sensors
is
beneficial
for
promoting
flexible
electronic
devices
human‐machine
interactive
systems.
Researchers
are
working
on
the
exploration
of
various
active
sensing
materials
toward
broad
detection,
multifunction,
low‐power
consumption.
Here,
a
ion‐gel
fibrous
membrane
presented
by
electrospinning
technology
utilized
to
construct
capacitive
triboelectric
nanogenerator
(TENG).
The
iontronic
sensor
exhibits
inherently
favorable
repeatability,
which
retains
long‐term
stability
after
5000
cycles.
can
also
detect
clear
pulse
waveform
at
human
wrist
enable
mapping
pressure
distribution
sensory
matrix.
For
TENG,
maximum
peak
power
54.56
µW
be
used
commercial
electronics.
In
addition,
prepared
TENG
array
achieve
interactive,
rapidly
responsive,
accurate
dynamic
monitoring,
broadens
direct
effective
devices.
promising
provide
an
outstanding
approach
physiological
biomechanical
energy
harvesting,
interaction,
self‐powered
monitoring
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(5), С. 6239 - 6249
Опубликована: Янв. 25, 2024
Hybrid
piezoelectric/triboelectric
nanogenerators
combine
the
merits
of
piezoelectric
(PENGs)
and
triboelectric
(TENGs),
possessing
enhanced
electrical
output
sensitivity.
However,
structures
majority
hybrid
are
rather
complex
in
integrating
both
functions,
limiting
their
practical
application
wearable
electronics.
Herein,
we
propose
to
construct
a
nanogenerator
(PT-NG)
with
simple
structure
based
on
composite
film
simultaneously
achieve
coupling
charge
generation
triboelectrification
improved
energy
conversion
efficiency.
The
consists
electrospun
PVDF
nanofibers
embedded
surface
PDMS
film,
which
not
only
forms
rough
nanomorphology
but
also
provides
structural
protection
by
during
compressive
deformation.
results
have
shown
that
PT-NG
can
generate
much
higher
outputs
than
individual
TENG
PENG
devices.
devices
exhibit
high
level
mechanical-to-electrical
efficiency
superior
performance
charging
capacitors
functioning
as
self-powered
sensors
for
detection
different
signals
from
finger
movement,
recognition
various
gestures,
monitoring
respiration.
More
importantly,
device
possesses
an
impressive
durability,
maintaining
its
layered
over
5000
testing
cycles
without
noticing
any
obvious
damage
or
detachment
between
layers.
Our
demonstrated
combining
substrate
is
efficient
way
fabricate
highly
harvesting
intelligent
identification
health
monitoring.
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(25), С. 14975 - 14985
Опубликована: Янв. 1, 2024
This
perspective
summarizes
recent
advances
in
electrochemical
humidity
sensors
and
mainly
focuses
on
three
aspects:
working
principles;
sensing
power
generation
performances;
self-powered
detection
system.
Abstract
Yarn‐woven
triboelectric
nanogenerators
(TENGs)
have
greatly
advanced
wearable
sensor
technology,
but
their
limited
sensitivity
and
stability
hinder
broad
adoption.
To
address
these
limitations,
Poly(VDF‐TrFE)
P(olyadiohexylenediamine
(PA66)‐based
nanofibers
coaxial
yarns
(NCYs)
combining
conjugated
electrospinning
online
conductive
adhesive
coating
are
developed.
The
integration
of
NCYs
led
to
enhanced
TENGs
(NCY‐TENGs),
notable
for
flexibility,
stretchability,
improved
sensitivity,
which
is
ideal
capturing
body
motion
signals.
One
significant
application
this
technology
the
fabrication
smart
insoles
from
NCY‐TENG
plain‐woven
fabrics.
These
highly
sensitive
possess
antibacterial,
breathable,
washable
properties,
making
them
real‐time
gait
monitoring
in
patients
with
diabetic
foot
conditions.
NCY‐TENGs
derivatives
show
immense
potential
a
variety
electronic
devices,
representing
considerable
advancement
field
sensors.
Underwater
ultrasonic
detection
is
critical
for
marine
security,
playing
a
vital
role
in
resource
development,
environmental
protection,
and
national
defense.
However,
existing
systems,
which
primarily
rely
on
active
scanning
technologies,
are
hindered
by
high
costs,
significant
energy
demands,
challenges
achieving
large-scale
deployment.
Here,
we
introduce
microfiber-based
triboelectric
acoustic
sensor
(MTAS)
featuring
core-shell
hierarchical
structure,
offering
self-powered
solution
precise
measurement
of
underwater
ultrasound
source
distance.
By
leveraging
the
principles
contact
electrification/triboelectrification
electrostatic
induction,
MTAS
efficiently
converts
complex
vibrations
into
real-time
electrical
signals.
The
demonstrates
rapid
response
times
as
low
8.6
μs,
signal-to-noise
ratio
29.8
dB,
capability
to
detect
sources
with
power
levels
above
1.6
W
via
time-difference-of-arrival
analysis.
To
address
sea
applications,
further
propose
distributed
network
that
integrates
multiple
units
capable
localization
motion
trajectory
visualization.
This
innovation
represents
transformative
approach,
combining
operation,
ease
deployment,
imperceptibility,
paving
way
large-area,
energy-efficient
submarine
security
systems.
Such
advancements
redefine
paradigm
target
detection,
aligning
technological
pressing
demands
safety
sustainability.
Nano-Micro Letters,
Год журнала:
2023,
Номер
15(1)
Опубликована: Авг. 11, 2023
The
evolution
of
wearable
technology
has
prompted
the
need
for
adaptive,
self-healable,
and
energy-autonomous
energy
devices.
This
study
innovatively
addresses
this
challenge
by
introducing
an
MXene-boosted
hydrogel
electrolyte,
which
expedites
assembly
process
flexible
thermocell
(TEC)
arrays
thus
circumvents
complicated
fabrication
typical
electronics.
Our
findings
underscore
electrolyte's
superior
thermoelectrochemical
performance
under
substantial
deformations
repeated
self-healing
cycles.
resulting
hydrogel-based
TEC
yields
a
maximum
power
output
1032.1
nW
ΔT
20
K
when
being
stretched
to
500%
1000
cycles,
corresponding
80%
its
initial
state;
meanwhile,
it
sustains
1179.1
even
after
60
cut-healing
approximately
92%
state.
as-assembled
array
exhibits
device-level
capability
high
adaptability
human
body.
It
is
readily
applied
touch-based
encrypted
communication
where
distinct
voltage
signals
can
be
converted
into
alphabet
letters;
also
employed
as
self-powered
sensor
in-situ
monitor
variety
body
motions
complex
actions.
swift
approach,
combined
with
versatile
functionality
device,
paves
way
future
advancements
in
electronics
targeting
at
fitness
monitoring
human-machine
interfaces.
