Advanced Energy Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 12, 2024
Abstract
Thermogalvanic
cells
(TGCs)
convert
heat
into
electricity
through
thermoelectrochemical
reactions
of
redox
couples,
generating
a
millivolt‐scale
Seebeck
coefficient.
However,
TGCs
based
on
liquid
electrolytes
are
prone
to
leakage,
whereas
quasi‐solid‐state
(QTCs)
using
gel‐based
typically
have
low
power
outputs
due
slow
ion
diffusion
and
limited
reaction
rates.
Herein,
we
present
novel
strategies
for
developing
high‐performance
all‐flexible
QTCs
both
metallized
fibril‐based
textile
electrodes
with
extremely
large
surface
area,
(specifically
Ni
textiles),
structure‐breaking
salts
hydrogel
electrolytes.
The
oxidized
create
oxide
heterostructures,
forming
numerous
O
vacancy
defects
that
enhance
reactions.
Meanwhile,
the
facilitate
improve
by
disrupting
water
structures
in
electrolyte.
These
advancements
significantly
performance
without
need
precious‐metal
electrodes,
achieving
remarkable
maximum
density
4.05
mW
m
−2
K
record‐high
effective
cell
conductivity
17.3
S
−1
,
compared
previously
reported
QTCs.
Finally,
proposed
can
generate
stable
open‐circuit
voltage
output
wearable
applications
owing
flexibility
electrolyte,
successful
electronic
device
operation
body
from
forearm
(Δ
T
≈
2
K).
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 2, 2024
Abstract
Hydrogels
are
renowned
for
their
complex
structures
and
unique
physicochemical
properties,
establishing
them
as
key
materials
in
bioenergy
harvesting
applications.
They
used
various
applications,
including
triboelectric
nanogenerators,
piezoelectric,
hydraulic,
thermoelectric,
biofuel
cells.
Among
these,
hydrogels
thermoelectric
applications
represent
a
technology
capable
of
continuously
converting
biological
energy
(thermal
energy)
into
electrical
energy.
This
shows
great
potential
commercial
value
body
monitoring,
storage,
human‐machine
interaction
Given
its
rapid
development,
timely
review
focusing
on
the
research
progress
composites
is
presented.
discusses
types
power
generation
refrigeration,
strategies
enhancing
performance,
field.
Finally,
remaining
challenges
feasible
identified
improving
efficiency,
stability,
application
range,
system‐level
integration
next‐generation
Chemical Science,
Год журнала:
2024,
Номер
15(35), С. 14122 - 14153
Опубликована: Янв. 1, 2024
Converting
waste
heat
from
solar
radiation
and
industrial
processes
into
useable
electricity
remains
a
challenge
due
to
limitations
of
traditional
thermoelectrics.
Ionic
thermoelectric
(i-TE)
materials
offer
compelling
alternative
thermoelectrics
their
excellent
ionic
thermopower,
low
thermal
conductivity,
abundant
material
options.
This
review
categorizes
i-TE
thermally
diffusive
thermogalvanic
types,
with
an
emphasis
on
the
former
its
superior
thermopower.
also
highlights
for
creating
supercapacitors
(ITESCs)
that
can
generate
significantly
higher
voltages
low-grade
sources
compared
conventional
technologies.
Additionally,
it
explores
cells
combined
devices,
discussing
key
optimization
parameters
theoretical
modeling
approaches
maximizing
device
performance.
Future
directions
aim
enhance
performance
address
energy
density
challenges
flexible
wearable
applications.
Herein,
cutting-edge
are
comprehensively
outlined,
empowering
researchers
develop
next-generation
harvesting
technologies
more
sustainable
future.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 10, 2025
Recently,
ionic
thermoelectric
supercapacitors
have
gained
attention
because
of
their
high
open
circuit
voltages,
even
for
ions
that
are
redox
inactive.
As
a
source
voltage
(electromotive
force),
an
asymmetry
in
electric
double
layers
developed
by
the
adsorption
at
electrode
surfaces
kept
different
temperatures
has
previously
been
proposed.
another
source,
Eastman
entropy
transfer,
which
is
related
to
Soret
coefficient,
considered.
Herein,
we
theoretically
estimated
voltages
generated
Stern
layer,
diffuse
layer
and
transfer.
The
Grahame
equation
generalized
consider
temperature
gradient
layer.
ion
coverage
difference
between
hot
cold
electrodes
obtained
solving
self-consistent
equations
using
isotherm.
results
compared
with
experimental
metal
conductive
polymer-based
electrode.
We
show
possible
origin
Seebeck
effect
caused
coverages
adsorbed
terms
various
types
interface
capacitance
factor
electrodes.
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 22, 2025
Abstract
Ionic
thermoelectric
materials
have
emerged
as
a
promising
avenue
for
harvesting
low‐grade
waste
heat,
with
significant
potential
applications
in
wearable
electronics.
This
study
introduces
novel
design
ionic
capacitors
(ITECs)
by
incorporating
host–guest
complexation
between
α–cyclodextrin
(α‐CD)
and
triiodide
ions
(I
3
−
).
The
strong
α‐CD
I
confines
the
diffusion
of
within
cylindrical
cavities
α‐CD,
evidenced
UV–vis
spectroscopy
13
C‐NMR
analysis.
confinement
enhances
ion
mobility
difference
sodium
ions,
which
turn
significantly
boosts
thermopower
polyvinyl
alcohol/α‐CD/NaI
hydrogels.
Accordingly,
optimized
sample
achieves
an
impressive
positive
14.24
mV
K
−1
high
power
factor
477.2
µW
−2
m
.
Furthermore,
stretchable
ITEC
demonstrates
substantial
density
5.9
mW
When
integrated
into
3‐leg
device,
stable
thermovoltage
176
is
generated
under
temperature
gradient
4.4
K,
thus
highlighting
this
system
efficient
thermal
energy
harvesting.
Macromolecular Rapid Communications,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 2, 2025
Polymer
gel-based
ionic
thermoelectric
(i-TE)
devices,
including
thermally
chargeable
capacitors
and
thermogalvanic
cells,
represent
an
innovative
approach
to
sustainable
energy
harvesting
by
converting
waste
heat
into
electricity.
This
review
provides
a
comprehensive
overview
of
recent
advancements
in
i-TE
materials,
focusing
on
their
Seebeck
coefficients,
the
mechanisms
underlying
thermodiffusion
effects,
various
strategies
employed
enhance
performance.
Gel-based
materials
show
great
promise
due
flexibility,
low
cost,
suitability
for
flexible
wearable
devices.
However,
challenges
such
as
improving
conductivity
stability
redox
couples
remain.
Future
directions
include
enhancing
efficiency
ionic-electronic
coupling
developing
more
robust
electrode
optimize
conversion
real-world
applications.
