Li 2 CO 3 as a Modifier for PVA/PVP/PEG Blend Polymer Electrolytes: Effects on Structural Integrity, Electrical Performance, Thermal Behavior and Optical Properties
Polymer-Plastics Technology and Materials,
Год журнала:
2024,
Номер
unknown, С. 1 - 12
Опубликована: Ноя. 24, 2024
The
effects
of
incorporating
lithium
carbonate
(Li2CO3)
into
a
polyvinyl
alcohol/polyvinyl
pyrrolidone/polyethylene
glycol
(PVA/PVP/PEG)
blend
polymer
electrolyte
were
investigated.
Electrolytes
prepared
via
solution
casting
method,
with
Li2CO3
added
at
10,
20,
and
30
wt.%
to
the
PVA/PVP/PEG
(50/30/20
ratio).
Fourier
transform
infrared
spectroscopy
analysis
revealed
interactions
between
salt
blend.
addition
both
PEG
resulted
in
increased
ionic
conductivity,
reaching
maximum
4.51
×
10−
5
S/cm
30°C
20
Li2CO3.
Ionic
conductivity
also
exhibited
positive
temperature
dependence.
Optical
showed
decrease
optical
energy
gap
Differential
thermal
indicated
improved
stability
increasing
content,
as
evidenced
by
higher
onset,
endset,
midset
temperatures.
enhanced
properties
modified
suggest
its
potential
applicability
lithium-based
electrochemical
devices.
Язык: Английский
Assessment of Different Reaction Media for the Facile Synthesis of Cellulose-Derived Biorenewable Polymer Cationic Cellulose: Synthesis, Characterization, and Perspectives
ACS Omega,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 20, 2025
Cationic
cellulose
stands
out
as
a
versatile
and
commercially
important
derivative
of
cellulose,
known
for
its
superior
reactivity
functional
properties.
The
present
study
demonstrates
the
optimal
utilization
management
bagasse
waste
through
cationic
synthesis.
It
primarily
focuses
on
development
an
optimized
efficient
etherification
strategy
synthesis
by
systematically
evaluating
three
distinct
approaches,
which
could
serve
breakthrough
selection
best
suitable
media
various
industrial
applications.
Proximate
chemical
analysis
was
conducted
to
assess
makeup
sugarcane
bagasse,
showed
presence
73.27%
holocellulose,
23.45%
lignin,
3.08%
solvent
(alcohol–benzene)
extractives,
5.08%
ash,
with
ample
occurrence
alpha
(43.21%),
thereby
showing
utility
Alpha
extracted
in
bulk
processed
different
approaches
preparation
instead
conventional
ones.
Approach
I
removes
excess
amount
water
prior
etherification,
while
II
retains
from
alkalization
step,
III
utilizes
isopropanol
additional
medium
during
involves
preparing
adding
2,3-epoxypropyltrimethylammonium
chloride
(EPTAC)
separately,
whereas
forms
it
situ
3-chloro-2-hydroxypropyltrimethylammonium
(CHPTAC).
In
III,
EPTAC
prepared
is
added
dropwise
alkoxide.
results
show
that
synthesized
had
highest
degree
substitution
(0.120),
followed
(0.088)
(0.016),
respectively.
having
maximum
DS
(0.12)
further
characterized
Fourier
Transform
Infrared
Spectroscopy
(FTIR),
X-ray
Diffraction
(XRD),
Field
Emission
Gun
Scanning
Electron
Microscopy
(FEGSEM).
Conclusively,
heterogeneous
recommended
approach
(Approach
I)
will
not
only
help
quality
product
but
also
conserve
resources
be
utilized
production
other
valued
products
elsewhere
near
future.
Язык: Английский
Polydopamine Doped Hexagonal Boron Nitride Coating Separator With Excellent Heat Resistance and Wettability for High‐Performance Lithium Metal Batteries
Journal of Applied Polymer Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 20, 2025
ABSTRACT
The
uneven
porous
structure
of
commercial
polypropylene
(PP)
separators
leads
to
non‐uniform
lithium
deposition
in
metal
batteries.
This
promotes
the
growth
dendrites,
which
can
penetrate
separator,
causing
internal
short
circuits
and
posing
significant
safety
risks.
In
this
work,
polydopamine
(PDA),
is
capable
undergoing
self‐polymerization,
was
introduced
into
h‐BN.
two
components
formed
a
conjugated
molecular
through
π‐π
interactions,
providing
enhanced
mechanical
strength
thermal
stability.
Subsequently,
PDA‐h‐BN
composite
(PB)
coated
onto
surface
PP
fabricate
novel
separator
(PP‐PB).
modified
PP‐PB
exhibits
excellent
stability,
electrolyte
wettability,
strength,
ensuring
uniform
heat
distribution
acting
as
robust
barrier
against
dendrite
penetration.
Furthermore,
Li/PP‐PB/Li
cell
demonstrated
stable
cycling
for
over
1000
h
at
1
mA·cm
−2
0.5
mAh·cm
.
Similarly,
Li/PP‐PB/Cu
maintained
coulombic
efficiency
(CE)
98.5%
after
200
cycles
ensures
effectively
suppresses
formation
dendrites.
Additionally,
Li/PP‐PB/LFP
battery
retained
capacity
158.6
mAh·g
−1
with
retention
rate
98.75%
900
C,
demonstrating
superior
stability
compared
PP‐based
(120
,
85.7%).
study
provides
valuable
insights
advancing
development
Язык: Английский