ACS Applied Materials & Interfaces,
Journal Year:
2023,
Volume and Issue:
15(27), P. 33148 - 33158
Published: June 29, 2023
Assembling
crystalline
materials
with
high
stability
and
proton
conductivity
as
a
potential
alternative
to
the
Nafion
membrane
is
challenging
topic
in
field
of
energy
materials.
Herein,
we
concentrated
on
creation
preparation
hydrazone-linked
COFs
super-high
explore
their
conduction.
Fortunately,
two
COFs,
TpBth
TaBth,
were
solvothermally
prepared
by
using
benzene-1,3,5-tricarbohydrazide
(Bth),
2,4,6-trihydroxy-benzene-1,3,5-tricarbaldehyde
(Tp),
2,4,6-tris(4-formylphenyl)-1,3,5-triazine
(Ta)
monomers.
Their
structures
simulated
Material
Studio
8.0
software
confirmed
PXRD
pattern,
demonstrating
two-dimensional
framework
AA
packing.
The
presence
large
number
carbonyl
groups
well
-NH-NH2-
backbone
responsible
for
water
absorption
capacity.
AC
impedance
tests
demonstrated
positive
correlation
between
water-assisted
(σ)
temperature
humidity.
Under
100
°C/98%
RH,
highest
σ
values
TaBth
can
reach
2.11
×
10-4
0.62
10-5
S·cm-1,
which
are
among
reported
COFs.
proton-conductive
mechanisms
highlighted
structural
analyses
N2
H2O
vapor
adsorption
data
activation
values.
Our
systematic
research
affords
ideas
synthesis
proton-conducting
Chemistry of Materials,
Journal Year:
2024,
Volume and Issue:
36(9), P. 4437 - 4443
Published: April 17, 2024
Covalent
organic
frameworks
(COFs)
possess
high
surface
areas
and
tunable
pore
structures
are
promising
candidates
for
H2
physisorption
materials.
However,
their
interaction
with
molecules
is
too
weak
to
take
advantage
of
the
porosity
COFs.
Here,
we
report
first
example
metal-doped
enhanced
H2-physisorption
COF.
By
leveraging
superior
stability
TPB-DMTP-COF,
can
well
preserve
COF
after
lithium
(Li)
doping,
yielding
a
area
1350
m2/g.
Due
Li-doping-enhanced
isosteric
heat,
material's
total
uptake
increased
from
4.98
6.91
wt
%
at
77
K
80
bar.
The
Li-doping-induced
enhancement
effect
does
not
involve
chemisorption,
material
shows
excellent
cycling
performance:
10
cycles
30
bar
capacity
retention
99%.
Our
results
reveal
that
tuning
adsorption
heat
by
postmodification
strategy
exploit
potential
porous
materials
efficient
storage.
Chemical Communications,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Fabrication,
and
preparation
methods
of
COFs
along
with
a
complete
review
the
last
one
decade's
progress
in
field
energy
storage
conversion
devices,
notably
batteries,
capacitors
fuel
cells,
has
been
presented.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(25)
Published: April 6, 2024
Mixed
conducting
materials
with
both
ionic
and
electronic
conductivities
have
gained
prominence
in
emerging
applications.
However,
exploring
material
on-demand
remains
challenging,
primarily
due
to
the
lack
of
correlating
macroscopic
conductivity
atom-scale
structure.
Here,
correlation
proton-electron
structure
graphdiyne
is
explored.
Precisely
adjusting
conjugated
diynes
oxygenic
functional
groups
yields
a
tunable
on
order
10
Nano Letters,
Journal Year:
2024,
Volume and Issue:
24(28), P. 8650 - 8657
Published: July 1, 2024
The
ion
permeability
and
selectivity
of
membranes
are
crucial
in
nanofluidic
behavior,
impacting
industries
ranging
from
traditional
to
advanced
manufacturing.
Herein,
we
demonstrate
the
engineering
ion-conductive
featuring
angstrom-scale
ion-transport
channels
by
introducing
ionic
polyamidoamine
(PAMAM)
dendrimers
for
separation.
exterior
quaternary
ammonium-rich
structure
contributes
significant
electrostatic
charge
exclusion
due
enhanced
local
density;
interior
protoplasmic
PAMAM
dendrimer
assembled
provide
additional
degrees
free
volume.
This
facilitates
monovalent
transfer
while
maintaining
continuity
efficient
screening.
dendrimer-assembled
hybrid
membrane
achieves
high
permeance
2.81
mol
m
