ACS Applied Materials & Interfaces,
Journal Year:
2023,
Volume and Issue:
15(44), P. 51330 - 51338
Published: Oct. 25, 2023
It
is
an
urgent
need
to
develop
lead-free
piezoelectric
energy
harvesters
(PEHs)
address
the
dilemma
and
meet
environmental
protection
requirements.
However,
low
output
power
densities
limit
further
promotion
of
PEHs
for
use
in
daily
life.
Here,
entropy-increasing
strategy
proposed
achieve
increased
density
819
μW/cm3
potassium
sodium
niobate
(KNN)-based
piezoceramics
by
increasing
configuration
entropy
realizing
nearly
two
times
growth
compared
with
low-entropy
counterparts.
Evolution
energy-harvesting
performance
demonstrated
systematically,
excellent
properties
achieved
are
attributed
enhanced
lattice
distortion,
flexible
polarization
configuration,
high-density
randomly
distributed
nanodomains
effect.
Moreover,
vibration
fatigue
resistance
variable
temperature
characteristics
were
also
realized
PEH
prepared
material.
The
significant
enhancement
comprehensive
demonstrates
that
construction
KNN-based
ceramics
high
represents
effective
convenient
enable
design
high-performance
thus
promotes
development
advanced
PEHs.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Oct. 18, 2024
The
contradiction
between
high
piezoelectricity
and
uniquely
poor
temperature
stability
generated
by
polymorphic
phase
boundary
is
a
huge
obstacle
to
high-performance
(K,
Na)NbO
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(29)
Published: March 17, 2024
Abstract
Piezoelectric
energy
harvesting
technology
is
drawing
substantial
attention
as
an
eco‐friendly
method
to
promote
transformation,
which
at
the
forefront
of
current
scientific
research.
However,
difficulties
involved
in
obtaining
a
stable
output
voltage
(
V
out
)
and
controllable
density
I
represent
bottlenecks
development
piezoelectric
harvesters
(PEHs)
for
practical
applications.
Here,
novel
strategy
that
couples
elastic
polarization
configuration
with
activity
rattling
space
lead‐free
potassium
sodium
niobate‐based
piezoceramics
proposed
break
through
this
barrier.
The
cantilever
beam‐type
PEHs
assembled
using
rationally
designed
piezoceramic
system
show
(≈22
V)
over
range
from
6.09
20.16
µA
cm
−2
,
sufficient
drive
multiple
types
wireless
sensors
have
same
rated
but
different
requirements.
These
fantastic
power
generation
performances
are
associated
coefficient
g
33
),
increasing
charge
d
weakened
electrostrictive
Q
stem
optimization
combination
introduction
design.
This
work
provides
good
approach
modulation
overall
performance
materials
meet
demands
advanced
PEH
Journal of Advanced Ceramics,
Journal Year:
2024,
Volume and Issue:
13(7), P. 1023 - 1031
Published: May 22, 2024
The
discovery
of
ferroelectricity
in
thin
films
based
on
HfO2
has
garnered
increasing
attention
worldwide,
primarily
due
to
their
remarkable
compatibility
with
silicon
and
scalability,
contrast
traditional
perovskite-structured
ferroelectric
materials.
Nonetheless,
significant
challenges
remain
widespread
commercial
utilization,
particularly
concerning
notable
wake-up
effect
limited
endurance.
To
address
these
challenges,
we
propose
a
novel
strategy
involving
the
inhomogeneous
distribution
Hf/Zr
elements
within
explore
its
effects
endurance
Hf0.5Zr0.5O2
films.
Through
techniques
such
as
grazing
incidence
X-ray
diffraction,
transmission
electron
microscopy,
piezoresponse
force
investigate
structural
characteristics
domain
switching
behaviors.
experimental
results
indicate
that
contributes
improve
frequency
stability
endurance,
while
maintaining
large
remnant
polarization
By
adjusting
Zr/Hf
films,
enhancements
(2Pr
>
35
μC/cm2)
(>109)
along
reduced
coercive
voltage
can
be
achieved.
Additionally,
fabricated
also
exhibit
high
dielectric
tunability
(≥
26%)
under
low
operating
2.5
V
whether
state
or
not.
This
study
offers
promising
approach
optimize
both
HfO2-based
