Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(45)
Published: July 23, 2024
Abstract
Ionic
diode‐based
generators
show
great
superiority
in
harvesting
low‐frequency
mechanical
energy
from
human
motions
for
various
wearable
applications.
The
major
challenge
is
to
improve
their
extremely
limited
output
voltage
the
miniaturization/simplicity
of
ionic
self‐powered
devices
as
well
further
improvement
mechanoelectric
conversion
performance.
Herein,
construction
gradient
polycation/polyanion
heterojunction
demonstrated
vastly
boost
voltage,
energy‐harvesting
efficiency,
and
sensing
performance
diode.
Besides
an
inherent
potential
at
polyanion/polycation
interface,
additional
transmembrane
potentials
can
be
generated
across
polyanion
polycation
conductors
diodes
due
charge
distribution.
Consequently,
produce
much
higher
(306.53
mV)
than
previously
reported
homogeneous
ones
(4.1–135
mV).
Meanwhile,
high
imparts
generator
with
ultrahigh
power
density
(50.16
µW
cm
−
2
or
250.8
−3
)
pressure‐perception
sensitivity
(43582
mV/MPa),
which
are
dramatically
increased
by
162.76%
128.71%,
respectively,
compare
those
one.
Impressively,
resulting
generate
ultralarge
current
(≈0.52
mA
−2
ultralong
discharge
time
(>400
s),
thus
enabling
continuous
generation
under
pressure
implantable
ACS Sensors,
Journal Year:
2024,
Volume and Issue:
9(1), P. 283 - 291
Published: Jan. 12, 2024
Developing
gas
sensors
capable
of
efficiently
detecting
harmful
gases
is
urgent
to
protect
the
human
environment.
Here,
an
active
Ce–Ag
bimetallic
pair
was
innovatively
introduced
into
SnS2,
which
successfully
exhibited
excellent
NO2
sensing
performance.
0.8%
Ce–SnS2–Ag
showed
a
response
5.18
1
ppm
at
low
temperature
80
°C,
with
lower
limit
detection
as
100
ppb.
DFT
calculations
revealed
that
Ce
atoms
are
substituted
main
lattice
opens
up
interlayer
spacing
and
serves
anchor
point
fix
Ag
in
interlayer.
The
pairs
modulate
electronic
structure
promotes
adsorption
charge
transfer
between
thus
achieves
such
outstanding
This
work
avenue
for
rational
functional
modification
SnS2
optimized
enhanced
sensing.
