Science Advances,
Journal Year:
2024,
Volume and Issue:
10(49)
Published: Dec. 4, 2024
Solar-thermal
energy
storage
(STES)
within
solid-liquid
phase
change
materials
(PCMs)
has
emerged
as
an
attractive
solution
to
overcome
intermittency
of
renewable
energy.
However,
current
systems
usually
suffer
from
slow
charging
rates,
sacrificed
capacity,
and
overheating
tendency.
Inspired
by
the
thermoregulation
behavior
Cyprinid
fish,
here,
we
present
a
quick-responsive,
ultrafast,
large-capacity,
overheating-protective
STES
strategy.
We
fabricate
liquid-infused
solar-absorbing
foam
charger
that
can
rapidly
advance
receding
interface
efficiently
store
solar-thermal
latent
heat
spontaneously
float
upward
cease
process
upon
overheating.
This
bioinspired
dynamic
is
adaptable
variety
PCMs,
unlocking
potential
for
safe
efficient
utilization
thermal
Nano-Micro Letters,
Journal Year:
2024,
Volume and Issue:
16(1)
Published: May 16, 2024
Abstract
Phase
change
materials
(PCMs)
offer
a
promising
solution
to
address
the
challenges
posed
by
intermittency
and
fluctuations
in
solar
thermal
utilization.
However,
for
organic
solid–liquid
PCMs,
issues
such
as
leakage,
low
conductivity,
lack
of
efficient
solar-thermal
media,
flammability
have
constrained
their
broad
applications.
Herein,
we
present
an
innovative
class
versatile
composite
phase
(CPCMs)
developed
through
facile
environmentally
friendly
synthesis
approach,
leveraging
inherent
anisotropy
unidirectional
porosity
wood
aerogel
(nanowood)
support
polyethylene
glycol
(PEG).
The
modification
process
involves
incorporation
phytic
acid
(PA)
MXene
hybrid
structure
evaporation-induced
assembly
method,
which
could
impart
non-leaking
PEG
filling
while
concurrently
facilitating
conduction,
light
absorption,
flame-retardant.
Consequently,
as-prepared
wood-based
CPCMs
showcase
enhanced
conductivity
(0.82
W
m
−1
K
,
about
4.6
times
than
PEG)
well
high
latent
heat
135.5
kJ
kg
(91.5%
encapsulation)
with
durability
stability
throughout
at
least
200
heating
cooling
cycles,
featuring
dramatic
conversion
efficiency
up
98.58%.
In
addition,
synergistic
effect
MXene,
flame-retardant
performance
has
been
significantly
enhanced,
showing
self-extinguishing
behavior.
Moreover,
excellent
electromagnetic
shielding
44.45
dB
was
endowed
CPCMs,
relieving
contemporary
health
hazards
associated
waves.
Overall,
capitalize
on
exquisite
cell
transport
development
multifunctional
showcasing
operational
principle
proof-of-concept
prototype
system.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
34(2)
Published: Oct. 3, 2023
Abstract
The
rapid
development
of
infrared
surveillance
technologies
has
attracted
great
attention
for
scientists
to
design
advanced
functional
materials
with
prominent
stealth
and
thermal
camouflage
effectiveness.
In
the
current
study,
a
sandwich‐like
composite
based
on
crosslinked
polyimide
aerogel,
meso‐erythritol
(mE)‐based
phase‐change
composite,
an
MXene
film
been
developed
achieve
long‐term
at
elevated
temperatures.
this
system,
lower
aerogel
layer
can
act
as
barrier
insulate
heat
transfer
through
its
layer‐stacking
structure
under
ultralow
directional
conduction.
introduction
middle
ensures
that
system
obtains
dynamical
temperature‐regulation
capability
sensible
latent
absorption
mE
phase
change
material,
while
upper
provides
very
low
emissivity
surface
system.
As
result,
achieves
significant
reduction
in
radiation
temperature
high‐temperature
target.
Moreover,
exhibits
good
electromagnetic
interference
shielding
effectiveness,
making
obtain
various
complicated
scenarios.
This
work
promising
approach
realize
targets
security
protection
counter‐surveillance.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(8), P. 10180 - 10195
Published: Feb. 16, 2024
To
realize
highly
efficient
solar-thermo-electric
energy
conversion
for
clean
electricity
power
generation,
we
have
developed
a
new
type
of
unidirectionally
structured
magnetic
phase-change
composite
comprising
carbonized
polyimide
(C–PI)/Kevlar
nanofiber
(KNF)
complex
aerogel
as
3D
carbon
skeleton
porous
supporting
material,
CoFe2O4
nanoparticles
additive,
polyethylene
glycol
(PEG)
and
polypyrrole
photothermal
absorption
coating
layer.
The
as-fabricated
C–PI/KNF
exhibits
unidirectional
microstructure,
high
porosity,
robust
frame,
ultralight
weight,
thermal
conductance.
Featured
with
such
unique
structure
characteristics,
the
can
offer
an
effective
heat
electron
transfer
method
to
ensure
solar-thermal
storage
composite.
latent
capacity
over
150
J
g–1,
outstanding
shape
stability
along
low
leakage
0.2
wt
%,
good
cycling
stability,
efficiency
84.8%.
Based
on
Seebeck
effect,
solar
thermoelectric
generation
system
(STEGS)
was
constructed
hot
side
coupled
cold
immersed
in
air
ice
water.
Under
2.0
kW
m–2
irradiation,
STEGS
water
obtained
maximum
output
voltage
current
259.7
mV
27.1
mA,
respectively,
which
are
significantly
higher
than
those
air.
environment
is
50.6%
that
under
4.0
irradiation.
More
importantly,
continuously
generated
about
810
s
without
irradiation
thanks
release
by
PEG
component
within
In
addition,
introduction
accelerate
through
periodic
motion
Néel
relaxation
or
Brownian
relaxation.
This
resulted
increase
13.7
11.5%,
alternating
field
result
magnetism-accelerated
conversion.
study
offers
innovative
approach
developing
PCM-based
advanced
functional
materials
utilization
sustainable
generation.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 23, 2024
Abstract
Although
optimizing
the
design
of
thermal
conductive
frameworks
to
promote
collection,
transportation,
and
storage
energy
in
composite
phase
change
materials
(CPCMs)
is
widely
studied,
research
on
oriented
layered
still
exploratory
stage.
Taking
inspiration
from
bidirectional
ice
template
strategy,
a
new
approach
proposed
influence
“oriented
micro‐unit”
conductivity
photothermal
mass
transfer
CPCMs.
Three
aramid
nanofibers
graphene
nanosheets
aerogels
with
different
structures
are
prepared
by
high‐energy
ball
milling
freezing.
The
enthalpy
values
within
range
146–152
J
g
−1
.
Photothermal
conversion
experiments,
hot
plate
solar‐thermal‐electric
experiments
multi‐physics
field
simulation
analysis
jointly
show
that
CPCMs
“back‐to‐back”
radial
structure
behaves
most
outstanding
ability
heat
performance,
an
increase
173.3%,
efficiency
91.9%,
maximum
output
voltage
303.3
mV.
opens
up
ideas
for
where
directional
required.
