Contact
electrification
(CE)
and
electrostatic
induction
(EI)
are
believed
to
be
the
core
processes
in
classic
liquid-solid
triboelectric
nanogenerators
(L-S
TENGs),
including
classical
transistor-like
droplet-based
electricity
generator
(DEG)
other
forms
of
DEGs.
Recently
reported
total
current
DEGs
made
full
use
CE,
EI,
charge
transfer
(CT)
effects
realized
coupling
displacement
conducting
currents.
However,
this
method
has
only
been
revealed
special
structures,
which
have
limitations
depending
on
falling
location
droplets.
Here,
we
construct
a
press-release
DEG
(PRTC-DEG)
using
single
droplet
water
visually
verify
universality
CT
contribution
DEG.
By
simply
squeezing
then
releasing
PRTC-DEG,
charges
squirted
out
realize
separation
space
time.
The
working
mechanism
PRTC-DEG
between
also
demonstrated.
In
addition,
structural
design
proposed
study
alleviates
dependence
output
droplets
provides
new
mode
for
DEG,
makes
expand
more
scenarios.
Nano Energy,
Journal Year:
2024,
Volume and Issue:
129, P. 110001 - 110001
Published: July 18, 2024
By
harvesting
thermal
energy
from
human
skin,
self-powered
wearable
electronics
have
the
potential
to
overcome
limitations
of
battery
power,
enabling
long-term
continuous
operation.
Flexible
thermoelectric
generators
(TEGs)
that
can
form
a
conformal
contact
with
heat
sources
any
shape
are
critical
for
wearables.
Nevertheless,
practical
implementations
and
efficient
body
still
hindered
by
factors
significantly
diminish
power
output
flexible
TEGs.
In
this
work,
we
present
design
framework
computational
platform
optimized
modelling
skin-heat
using
organic-based
thin-film
First,
three-dimensional
numerical
model
based
on
finite
element
method
(FEM)
has
been
developed,
which
enables
study
optimization
film
(TE)
device
TEG
parameters,
such
as
width,
length,
thickness,
interconnection
dimensions,
maximize
performance.
Then,
used
investigate
effect
skin
applications
in
different
parts
environmental
conditions.
Mechanical
interlayers
designed
control
various
interface
functions
alter
junction
resistances,
leading
structures
either
highly
conductive
or
insulating.
Soft
conductor
(SHC)
soft
insulator
(SHI)
layers
embedded
enhance
interfaces
temperature
difference
across
TEG.
As
result,
embedding
these
increase
(ΔT)
open
circuit
voltage
(VOC)
along
∼30
%
over
conventional
TEGs,
while
preserving
mechanical
softness
flexibility.
Additionally,
impact
skin/TEG
matching
flux
at
is
presented.
Lastly,
state-of-the-art
post-treated
poly(3,4-ethylenedioxythiophene)
polystyrene
sulfonate
(PEDOT:PSS)
film-based
model,
determined
maximum
obtainable
under
three
distinct
conditions
(cold,
room,
hot
temperatures).
SusMat,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 22, 2024
Abstract
Benefiting
from
the
high
sensitivity
and
electromechanical
conversion
efficiency,
triboelectric
nanogenerators
(TENGs)
are
widely
used
in
various
fields
of
self‐powered
sensing
mechanical
energy
harvesting,
which
have
great
potential
for
application
future
smart
Internet
Things.
The
development
sustainable
materials
with
high‐performance
has
a
vital
impact
on
construction
TENG
devices
that
combine
high‐output
performance
environmental
friendliness,
positive
humanity.
This
review
systematically
comprehensively
summarizes
latest
research
work
TENG's
materials.
First,
an
overall
overview
is
provided
based
composition
materials,
including
amino
acids,
polysaccharides,
synthetic
polymer,
representative
works
further
classified
summarized
detail.
In
addition,
progress
harvesting
applications
also
summarized.
Finally,
overviews
challenges
current
material,
related
outlooks
offered
corresponding
strategies
directions
this
field
future.
Polymers,
Journal Year:
2024,
Volume and Issue:
16(13), P. 1784 - 1784
Published: June 24, 2024
Triboelectric
nanogenerators
(TENGs)
show
promising
potential
in
energy
harvesting
and
sensing
for
various
electronic
devices
multiple
fields.
However,
the
majority
of
materials
currently
utilized
TENGs
are
unrenewable,
undegradable,
necessitate
complex
preparation
processes,
resulting
restricted
performance
durability
practical
applications.
Here,
we
propose
a
strategy
that
combines
straightforward
chemical
modification
electrospinning
techniques
to
construct
all-cellulose
nanofiber-based
with
substantial
power
output.
By
using
cellulose
acetate
(CA)
as
raw
material,
prepared
membranes
(CMs)
fluorinated
(FCMs)
different
functional
groups
hydrophobic
properties
applied
tribopositive
tribonegative
friction
layers
FCM/CM-based
triboelectric
(FC-TENGs),
respectively.
This
approach
modulates
microstructure
polarity
FC-TENGs,
thus
enhancing
their
charge
densities
contact
areas.
As
result,
assembled
FC-TENGs
demonstrate
enhanced
output
(94
V,
8.5
µA,
0.15
W/m2)
exceptional
15,000
cycles.
The
efficient
capabilities
can
be
implemented
applications
devices.
Our
work
strengthens
viability
cellulose-based
sustainable
development
provides
novel
perspectives
on
cost-effective
valuable
utilization
future.
