Dielectric
ceramic–based
capacitors
have
triggered
growing
concerns
because
of
their
potential
applications
in
next–generation
pulsed
power
electronic
devices.
However,
the
low
energy
density
seriously
hampers
further
development,
and
high
(>
6
J/cm3)
is
generally
realized
under
a
giant
external
electric
field
500
kV/cm).
Herein,
an
ultrahigh
recoverable
8.5
J/cm3
efficiency
87%
moderate
470
kV/cm
obtained
Sr(Sc1/2Nb1/2)O3
modified
BiFeO3–BaTiO3
ceramics
via
improved
dielectric
relaxation
breakdown
strength
(Eb).
And
promoted
band
gap
reduced
grain
size
play
key
role
enhancing
Eb.
Moreover,
sample
with
optimal
composition
also
exhibits
superb
thermal
reliability
at
wide
temperature
range,
outstanding
frequency
cycling
stability
350
kV/cm.
This
work
not
only
provides
hopeful
alternative
for
advanced
storage
capacitors,
but
demonstrates
effective
way
to
explore
high–performance
materials.
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(9), P. 5261 - 5268
Published: Jan. 1, 2024
The
CaHfO
3
-modified
BiFeO
–BaTiO
lead-free
ceramic
exhibiting
superior
recoverable
energy
storage
density
of
4.70
J
cm
−3
and
efficiency
79%
can
be
considered
as
an
excellent
candidate
for
applications.
Nature Communications,
Journal Year:
2025,
Volume and Issue:
16(1)
Published: Feb. 28, 2025
Lead-free
BiFeO3-based
(BF)
materials
with
colossal
spontaneous
polarization
and
high
Curie
temperatures
exhibit
considerable
potential
for
groundbreaking
developments
in
dielectric
capacitors.
However,
their
inherent
limitations,
such
as
restricted
breakdown
strength
(Eb)
pronounced
remanent
polarization,
critically
restrict
advancements
energy
storage
capabilities.
Herein,
we
achieve
an
exceptional
recoverable
density
of
12.2
J
cm−3
impressive
efficiency
90.1%
via
the
strategic
design
a
dipolar
region
resilience
to
electric
fields
within
ceramics.
Guided
by
phase-field
simulations
validated
through
atomic-scale
observations,
superior
performance
is
attributed
incorporation
aliovalent
ions,
which
disrupt
long-range
ordered
single-phase
distribution,
thus
enhancing
disorder
vectors
drastically
reducing
hysteresis.
Simultaneously,
refinement
microstructural
scale,
coupled
introduction
high-bandgap
synergistically
improves
durability.
This
study
provides
feasible
blueprint
leveraging
high-performance
ceramics,
further
facilitates
progress
lead-free
capacitors
next-generation
systems.
The
authors
make
multi-oriented
nanodomain
ceramics
fields,
achieving
90.1%.
ACS Applied Materials & Interfaces,
Journal Year:
2023,
Volume and Issue:
15(34), P. 40735 - 40743
Published: Aug. 18, 2023
Electrostatic
capacitors
based
on
dielectric
materials
are
essential
for
enabling
technological
advances,
including
miniaturization
and
integration
of
electronic
devices.
However,
maintaining
a
high
polarization
breakdown
field
strength
simultaneously
in
electrostatic
remains
major
challenge
industrial
applications.
Herein,
universal
approach
to
delaying
saturation
BaTiO3-based
ceramic
is
reported
via
tailoring
phase
fraction
improve
capacitive
performance.
The
0.85(0.7BaTiO3-0.3Bi0.5Na0.5TiO3)-0.15Bi0.5Li0.5(Ti0.75Ta0.2)O3
delivers
an
ultrahigh
recoverable
energy
density
(Wrec)
7.16
J
cm-3
along
with
efficiency
(η)
approximately
90%
at
electric
700
kV
cm-1,
outperforming
the
current
ceramics
other
lead-free
ceramics.
Meanwhile,
Wrec
η
exhibit
wide
frequency,
temperature,
cycling
fatigue
stability.
Additionally,
both
extremely
fast
discharge
time
115
ns
large
power
106.16
MW
concurrently
attained.
This
work
offers
promising
pathway
design
order
create
scalable
high-energy-density
highlight
research
prospects
pulse
Journal of the American Ceramic Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 22, 2025
Abstract
High
energy
density
(
W
rec
)
dielectrics
with
excellent
efficiency
η
and
thermal
stability
are
crucial
in
high‐power
storage
applications.
In
this
work,
we
introduce
Ba(Zr
0.2
Ti
0.8
)O
3
(BZT)
into
Bi
0.5
Na
TiO
(BNT)
to
delay
saturation
polarization
refine
grain
sizes
for
enhancing
performance.
BZT
diffusing
BNT
lattice
not
only
increases
electronegativity
between
A‒O/B‒O
bond
the
relaxor,
but
also
is
beneficial
refining
suppressing
development
of
local
electric
branches.
Therefore,
high
P
max
moderate
r
improved
breakdown
strength
achieved
BNT‒
x
ceramics
=
0.6
mol.
Additionally,
BNT‒0.60BZT
demonstrate
enhanced
recoverable
4.1
J
cm
−3
91%,
along
favorable
overdamped
charge‒discharge
properties
including
a
maximum
current,
discharge
density,
time
10
A,
2.4
,
150
ns,
respectively.
Materials,
Journal Year:
2025,
Volume and Issue:
18(9), P. 1937 - 1937
Published: April 24, 2025
In
this
work,
we
introduce
a
high
entropy
effect
in
designing
relaxor
ferroelectric
(RFE)–antiferroelectric
(AFE)
crossover
ceramic
by
incorporating
relaxor-like
oxide
(Pb0.25Ba0.25Sr0.25Ca0.25)TiO3
with
antiferroelectric
NaNbO3.
The
results
show
that
the
ferroelectricity
of
system
is
enhanced
increasing
NaNbO3,
and
when
new
composition
reaches
highest
configurational
entropy,
stable
energy
storage
properties
can
be
achieved.
This
enabled
breakdown
strength
due
to
small
grain
size
slim
hysteresis
loop
efficiency
entropy-stabilized
short-range
ordered
polar
nanoregions
(PNRs).
These
findings
showcase
potential
strategy
for
exploiting
compositions
high-performance
electrostatic
capacitors.
