Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 21, 2025
Abstract
The
development
of
rapid
and
stable
ion‐conductive
channels
is
pivotal
for
solid‐state
electrolytes
(SSEs)
in
achieving
high‐performance
lithium
metal
batteries
(LMBs).
Covalent
organic
frameworks
(COFs)
have
emerged
as
promising
Li‐ion
conductors
due
to
their
well‐defined
channel
architecture,
facile
chemical
tunability,
mechanical
robustness.
However,
the
limited
active
sites
restricted
segmental
motion
Li
+
migration
significantly
impede
ionic
conductivity.
Herein,
a
rational
design
strategy
presented
construct
3D
porous
COF
(TP‐COF
TB‐COF)
using
linear
ditopic
monomers
connected
via
C─C
C─N
linkages.
These
COFs,
integrated
with
polymer
electrolytes,
provide
enhanced
transport
pathways
stabilize
anodes
LMBs.
TB‐COF,
featuring
larger
pore
apertures
abundant
─C═N─
sites,
facilitates
superior
conduction
(8.89
×
10
−4
S
cm
−1
)
high
transference
number
(0.80)
by
enhancing
salt
dissolution.
LiF/Li
3
N‐rich
SEI
enables
uniform
deposition,
enabling
PEO‐TB‐COF
SSEs
achieve
>1000
h
stability
at
1
mA
cm⁻
2
while
retaining
90%
capacity
through
800
cycles
(0.5
C)
LFP||Li
cells.
Molecular
dynamics
simulations
COMSOL
Multiphysics
modeling
reveal
that
extended
reduced
interfacial
diffusion
barriers
are
key
performance.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 12, 2025
Abstract
Imide
covalent
organic
frameworks
(COFs)
are
considered
promising
materials
in
various
fields
due
to
their
exceptional
stability,
large
surface
area,
and
high
porosity.
However,
current
synthesis
methods
of
imide
COFs
typically
involve
complex
vacuum
operations,
amounts
solvents,
long
reaction
times
at
temperatures,
limiting
scalability
for
industrial
production.
Herein,
a
facile
self‐accelerated
strategy
is
developed
rapid,
low‐cost,
large‐scale
eight
(SACOFs)
under
solvent‐free,
vacuum‐free,
low‐temperature
conditions.
Mechanistic
studies
reveal
that
the
driven
by
self‐generated
water
atmospheric
conditions,
which
accelerates
reversible
self‐healing
disordered
polymers,
ultimately
leading
rapid
highly
crystalline
COFs.
Notably,
only
additive
required
besides
COF
monomers
o
‐substituted
benzoic
acid,
small
amount
grafted
onto
COFs,
enabling
straightforward
functionalization.
Thiol‐functionalized
SACOFs
synthesized
as
supports
anchoring
Pd
nanoparticles.
The
as‐prepared
Pd@SACOFs
exhibit
activity
selectivity
hydrogenation
substituted
nitrobenzene
modulation
thiol
groups.
synthetic
enables
production
potentially
paving
way
transition
from
laboratory
research
commercial
applications.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 25, 2025
Stimulus-responsive
covalent
organic
frameworks
(COFs)
own
color-switching
characteristics
when
exposed
to
external
stimuli.
However,
the
investigations
on
multiple
solvent-responsive
COFs
remain
a
challenge
due
synthetic
difficulties
and
uncontrollable
charge
transfer
process
toward
various
solvents.
In
this
contribution,
two
novel
isomeric
with
regulated
intramolecular
(ICT)
by
modulating
distance
between
donor/acceptor
linkage
are
synthesized.
The
as-prepared
exhibited
significantly
distinct
solvatochromic
behaviors
in
water,
acid,
halogenated
solvents,
respectively.
These
functions
attributed
enhancement
degrees
of
ICT
hydrogen
bond
interactions,
protonation
halogen/π
addition,
employed
as
stimulation-responsive
powder
or
ink,
displaying
excellent
image
data
encryption
performances.
work
can
not
only
offer
viewpoint
for
creation
but
also
expand
COFs'
potential
applications
information
anti-counterfeiting.
Macromolecular Rapid Communications,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 7, 2025
Abstract
The
leakage
of
iodine
and
its
radioactive
isotopes
poses
a
major
threat
to
ecosystems
human
health,
emphasizing
the
need
for
effective
recyclable
capture
materials.
Covalent
organic
frameworks
(COFs),
characterized
by
high
surface
areas,
tunable
pore
sizes,
excellent
chemical
stability,
are
ideal
candidates
adsorption
applications.
Herein,
two
novel
COFs
(JUC‐700
JUC‐701)
designed
synthesized
based
on
benzotrithiophene
(BTT).
Both
JUC‐700
JUC‐701
exhibit
areas
(2004.9
1990.5
m
2
g
−1
,
respectively),
mesoporous
structures
(≈2.6
nm),
abundant
heteroatoms,
contributing
their
exceptional
performance.
Notably,
demonstrates
superior
capacity
(6.17
)
compared
(4.73
),
attributes
enhanced
affinity
near
pyridine
groups.
Theoretical
calculations
further
reveal
that
pyridinic
nitrogen
in
significantly
strengthens
interactions
with
molecules,
confirming
capabilities.
This
study
provides
insights
into
design
functionalized
capture,
advanced
materials
environmental
remediation
nuclear
waste
management.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 21, 2025
Abstract
The
design
and
synthesis
of
stable
efficient
anode
materials
for
organic
lithium‐ion
batteries
(LIBs)
are
critical
achieving
environmental
sustainability.
Herein,
a
flavone‐linked
covalent
framework
(FV‐COF)
with
high
crystallinity
is
synthesized
via
cascade
reaction
based
on
the
Claisen‐Schmidt
condensation
anodes
LIBs.
incorporation
an
oxygen‐rich
flavonoid
structure
fully
conjugated
endows
FV‐COF
exceptional
physicochemical
stability
reversible
redox
capacity.
Thus,
demonstrates
performance
as
material,
delivering
steady‐state
capacity
1136.8
mA
h
g
−1
after
ten
cycles
at
0.1
A
excellent
rate
capability.
In
particular,
cyclic
retained
546.5
mAh
5.0
10
000
cycles,
accompanied
by
Coulombic
efficiency
exceeding
98%.
This
work
that
COFs
rich
site
linkages
promising
candidates
developing
lightweight
batteries.
