Journal of Industrial Textiles,
Год журнала:
2024,
Номер
54
Опубликована: Янв. 1, 2024
Piezoelectric
materials
have
garnered
significant
interest
owing
to
width
range
of
applications
in
sensing
and
energy
harvesting
by
converting
environmental
mechanical
electricity.
Improving
the
performance
piezoelectric
nanogenerators
(PENGs)
is
an
important
challenge
develop
these
devices.
Herein,
a
novel
method
was
used
enhance
piezoelectricity
PENGs
based
on
PVDF
NFs
(polyvinylidene
fluoride
nanofibers)
BaTiO3
NPs
(barium
titanate
nanoparticles)
simultaneously
electrospinning
electrospraying
NPs.
Two
set
nanogenerator
devices
were
prepared
which
differ
layer
arrangements
volume
fraction
piezopolymer
piezoceramic
parts.
Results
showed
that,
case
(E/E),
increase
phase
content
voltage
output
has
been
observed
comparison
with
arrangement.
The
improved
piezoelctric
performace
may
result
from
better
dipole
alignment
facilitated
more
intense
electric
field
during
E/E
process,
along
heightened
interactions
between
two
arising
enhanced
contact
multilayer
configuration.
Moreover,
optimum
ratio
obtain
maximum
1.5
0.5.
Therefore,
effectively
without
having
common
challenges
process
nanocomposites,
as
well
decreasing
total
preparation
time
simplifies
processing
steps.
Having
such
features,
leads
hold
great
appeal
for
diverse
applications.
As
artificial
intelligence
(AI)
advances,
it
is
critical
to
give
conventional
electronics
the
capacity
“think,”
“analyze,”
and
“advise.”
The
need
for
intelligent,
self-powered
devices
has
increased
due
recent
significant
developments
in
computer
field,
namely,
fields
of
AI
machine
learning
(ML).
use
nanogenerators
area
acoustics
examined
this
Review,
with
an
emphasis
on
how
they
might
be
integrated
ML
AI.
Innovative
energy-harvesting
called
are
able
produce
electrical
power
from
outside
sources,
such
as
vibrations
air
or
mechanical
movements.
study
examines
a
number
acoustic
applications
nanogenerators,
energy
harvesting,
sound
detection,
noise
monitoring,
sensing.
Furthermore,
research
highlights
techniques
enhance
performance
enable
more
efficient
through
data
analysis
model
training.
At
end
future
development
prospects
based
were
discussed.
Advanced Functional Materials,
Год журнала:
2023,
Номер
33(41)
Опубликована: Июнь 27, 2023
Abstract
The
µW‐level
power
density
of
flexible
piezoelectric
energy
harvesters
(FPEHs)
restricts
their
potential
in
applications
related
to
high‐power
multifunctional
wearable
devices.
To
overcome
this
challenge,
a
hierarchical
design
strategy
is
proposed
by
forming
porous
piezoceramics
with
an
optimum
microstructure
into
ordered
macroscopic
array
structure
enable
the
construction
high
performance
FPEHs.
piezoceramic
elements
allows
optimization
sensing
and
harvesting
Figure
merit,
causes
level
effective
strain
under
mechanical
load.
introduction
network
polymer
channels
between
also
provides
increased
device
flexibility,
thereby
allowing
attach
conform
curved
contours
human
body.
unique
architecture
exhibits
superior
open
circuit
voltage
(618
V),
short
current
(188
µA),
ultrahigh
(19.1
mW
cm
−2
).
This
value
surpasses
previously
reported
high‐performance
can
charge
0.1
F
supercapacitor
at
2.5
Hz
electronic
Finally,
FPEH
employed
two
novel
fracture
healing
monitoring
self‐powered
wireless
position
tracking
extreme
environments.
Journal of Materiomics,
Год журнала:
2023,
Номер
9(4), С. 609 - 617
Опубликована: Фев. 4, 2023
Lead-free
piezoelectric
ceramic
is
a
promising
material
for
energy
harvesters,
as
they
have
superior
electromechanical,
ferroelectric,
and
properties.
In
addition,
ceramics
can
be
blended
with
polymer
to
achieve
high-flexibility
polymer-ceramic
composites,
providing
mechanical
robustness
stability.
this
context,
new
lead-free
ferroelectric
material,
having
the
chemical
formula
SrTi2O5
(STO),
was
synthesized
using
high-temperature
solid-state
reaction.
Detailed
analyses
of
structural,
morphological,
electrical
properties
were
performed.
STO
crystallizes
orthorhombic
symmetry
space
group
Cmm2.
The
frequency
temperature-dependent
dielectric
parameters
evaluated,
impedance
spectroscopy
shed
light
on
charge
dynamics.
PDMS-STO
composites
at
different
mass
fraction
prepared
solvent
casting
route,
corresponding
nanogenerator
(PENG)
developed.
output
PENG
by
varying
massfractions
in
PDMS
force
investigated.
15%
(in
mass)
device
delivered
highest
peak-to-peak
voltage,
current,
power
density
25
V,
92
nA,
0.64
μW
@
500
MΩ,
respectively.
biomechanical
harvesting
daily
human
motions,
bending
device,
attaching
laboratory
equipment
demonstrated.
Later
attached
throat
region,
snoring
signals
recorded.
A
classification
model
designed
employing
convolutional
neural
network
(CNN)
model.
Efforts
been
laid
differentiate
between
normal
abnormal
snores,
which
could
help
patient
screening
early
disease
detection,
contributing
self-powered
healthcare
applications.
Journal of Composites Science,
Год журнала:
2025,
Номер
9(2), С. 71 - 71
Опубликована: Фев. 5, 2025
Free-standing
ferroelectric
films
have
emerged
as
a
transformative
technology
in
the
field
of
flexible
electronics,
offering
unique
properties
that
enable
wide
range
applications,
including
sensors,
actuators,
and
energy
harvesting
devices.
This
review
paper
explores
recent
advancements
fabrication,
characterization,
application
free-standing
films,
highlighting
innovative
techniques
such
multilayer
structures
van
der
Waals
epitaxy
enhance
their
performance
while
maintaining
mechanical
flexibility.
We
discuss
critical
role
these
next-generation
devices,
emphasizing
potential
for
integration
into
multifunctional
systems
combine
sensing
capabilities.
Additionally,
we
address
challenges
related
to
leakage
currents,
polarization
stability,
scalability
must
be
overcome
facilitate
commercialization.
By
synthesizing
current
research
findings
identifying
future
directions,
this
aims
provide
comprehensive
overview
state-of-the-art
impact
on
development
sustainable
efficient
electronic
technologies.
This
study
proposes
a
phononic
crystal
(PnC)
with
triple
defects
in
an
L-shape
arrangement
for
broadband
piezoelectric
energy
harvesting
(PEH).
The
incorporation
of
PnCs
has
attracted
significant
attention
PEH
fields
owing
to
properties
such
as
localization
and
amplification
near
the
defect.
Several
studies
have
been
conducted
enhance
output
electric
power
PnC-based
systems
single
defects.
However,
it
is
susceptible
limitations
narrow
bandwidth.
Recently,
double-defect-incorporated
proposed
widen
bandwidth
via
defect-band
splitting.
Nevertheless,
performance
rapidly
decreases
frequency
range
between
split
defect
bands.
single-
can
be
resolved
by
design
concept,
called
PnC.
isolated
at
top
vertex
letter
'L'
compensates
systems,
whereas
double
bottom
vertices
compensate
single-defect-incorporated
systems.
Hence,
effectively
confine
harvest
elastic-wave
over
frequencies
while
enhancing
application
effectiveness
concept
numerically
validated
using
finite
element
method.
In
case
circular
hole-type
PnC,
verified
that
PnC
broadens
bandwidth,
improves
voltage
compared
those
expands
space
defect-incorporated
might
shed
light
on
other
engineering
applications
detector
elastic
wave
transfer.
