Advanced Materials Technologies,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 14, 2025
Abstract
Droplet‐based
electricity
generators
(DEGs)
harness
liquid‐solid
electrification
to
convert
water
droplets
impacts
into
electrical
energy.
This
study
systematically
examines
how
droplet
height,
volume,
flow
rate,
and
substrate
tilt
angle
influence
DEG
performance
using
polytetrafluoroethylene
(PTFE)
as
a
triboelectric
layer
deionized
water.
Three
electrode
designs
(double,
top,
bottom)
are
evaluated,
revealing
that
the
double‐electrode
configuration
delivers
highest
output.
enhanced
arises
from
synergistic
motion,
double‐layer
formation,
charge
discharge,
validated
by
an
equivalent
circuit
model.
By
varying
heights
1–20
cm,
volumes
of
7.7–50
µL,
rates
50–300
drops/min,
angles
0–90°,
optimized
setup
yields
−70
V
22
mA,
translating
power
density
0.28
µW
cm
−2
.
High‐speed
imaging
correlates
these
outputs
with
impact
dynamics
resulting
transfer.
Additionally,
can
small
electronic
devices,
capacitors,
monitor
artificial
acid
rain
in
real‐time,
displaying
distinct
signals
compared
typical
rainwater.
These
findings
underscore
potential
DEGs
renewable
energy
harvesters
smart
environmental
sensors,
paving
way
for
advanced
on‐demand
generation
diverse
settings.
Advanced Energy Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 19, 2025
Abstract
Wave
energy
is
a
promising
sustainable
yet
to
be
fully
exploited
due
the
low
frequency
and
broad‐banded
wave
fields,
so
much
that
difficult
capture,
resulting
in
efficiency
limited
power
output
from
current
many
harvesters.
Here,
topological
defect
gyro‐multigrid
triboelectric
nanogenerator
(TD‐GM‐TENG)
proposed
harnesses
mechanical
of
ocean
waves
generate
electricity
promotes
accumulation
charge
on
basis
realized
high
rotation
speed
under
precession
gravitation
acceleration
effects.
It
benefited
strategy,
TD‐GM‐TENG
offers
transfer
rate
3.1
µC
s
−1
when
can
reach
nearly
1000
rpm
at
1
Hz.
Furthermore,
density
reaches
90
m
−
2
cycle
0.06
s,
which
1.6
times
higher
than
same
kind
spherical‐TENGs
field
harvesting.
Finally,
unit
outputs
peak
3.7
mW
simulated
water
environment
Hz
demonstrates
its
applicability
feasibility
being
used
as
distributed
emergency
supply
offshoring
observation
early
warning
services.
Energy Technology,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 30, 2025
Fire‐retardant
materials‐based
triboelectric
nanogenerators
(F‐TENG)
are
gaining
significant
interest
for
their
dual
roles
in
energy
harvesting
and
self‐powered
sensing,
especially
suited
areas
with
limited
electricity
access
or
during
fire
emergencies.
Despite
this,
there
has
been
exploration
of
F‐TENGs,
such
as
the
availability
new
retardant
materials
fire‐related
scenarios,
where
multifunctional
adaptable
devices
increasingly
demand.
This
study
first
introduces
a
flame‐retardant
material
based
on
white
glue
baking
soda
coated
upon
cotton
cloth
further,
it
is
used
an
effective
F‐TENG
operating
single‐electrode
mode.
The
treated
fabric
obtained
by
simple
coating
drying
techniques,
which
illustrates
that
fabrics
demonstrate
excellent
self‐extinguishing
properties.
achieves
maximum
peak
power
61
μW
at
tapping
frequency
2
Hz.
output
TENG
maintains
80%
its
original
electrical
voltage
(60–47
V)
after
burning
6
times.
subsequently
utilized
to
create
sensor
indication,
enhancing
rescue
evacuation
efforts.
invention
expands
application
technology
preventing
building
fires,
could
lead
creation
urban
ecosystems
improvements
smart
structures.
Micro and Nano Systems Letters,
Journal Year:
2025,
Volume and Issue:
13(1)
Published: April 12, 2025
Abstract
Omnidirectional
wind
energy
harvesting
has
gained
increasing
attention
as
a
means
of
harnessing
the
inherently
variable
and
multidirectional
flows
encountered
in
real-world
environments.
Triboelectric
nanogenerators
(TENGs),
which
leverage
contact
electrification
electrostatic
induction
to
convert
mechanical
motion
into
electrical
power,
are
particularly
well-suited
for
such
applications
due
their
ability
operate
effectively
under
low-speed
intermittent
conditions.
In
this
review,
we
first
outline
fundamental
triboelectric
processes
operating
modes
that
underpin
TENG
functionality,
emphasizing
how
low
inertia
high-voltage
outputs
make
them
compatible
with
wide
range
profiles.
We
then
discuss
three
predominant
device
classifications—rotary,
aeroelastic,
rolling-based—highlighting
distinct
configurations
capacities
omnidirectional
capture.
Key
examples
illustrate
strategically
designed
rotor
geometries,
flutter-driven
films,
rolling
elements
can
maximize
contact–separation
events
enhance
generation
complex
airflow
patterns.
Finally,
examine
major
obstacles
faced
by
TENG-based
harvesters,
including
durability,
hybrid
system
design,
intelligent
power
management.
Strategies
overcome
these
barriers
involve
wear-resistant
materials,
adaptive
architectures,
advanced
circuitry,
offering
solutions
feasible
micro-
or
off-grid
scenarios.
