Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 17, 2024
Abstract
Inhibiting
the
shuttle
of
polysulfides
is
great
significance
for
promoting
practical
application
lithium–sulfur
batteries
(LSBs).
Here,
an
imine‐linked
covalent
organic
framework@carbon
nanotube
(COF@CNT)
interlayer
composed
triazine
and
boroxine
rings
constructed
between
sulfur
cathode
separator
reception
reutilization.
The
introduction
CNT
imparts
conductor
characteristic
to
attributed
electron
tunneling
in
thin
COF
shell,
creates
a
hierarchical
porous
architecture
accommodating
polysulfides.
uniform
distribution
amphiphilic
adsorption
sites
microporous
structure
not
only
enables
efficient
entrapment
while
allowing
penetration
Li
+
ions,
but
also
provides
stable
electrocatalytic
channel
bidirectional
conversion
active
achieve
substantially
improved
capacity
stability.
interlayer‐incorporated
LSBs
deliver
ultrahigh
1446
mA
g
−1
at
0.1C
ultralow
decay
rate
0.019%
1C
over
1500
cycles.
Even
electrolyte/sulfur
ratio
6
µL
mg
,
outstanding
995
mAh
retention
74.1%
200
cycles
0.2C
are
obtained.
This
work
offers
compelling
reactivation
strategy
stimulating
study
on
ultra‐stable
LSBs.
Energy & Environmental Science,
Journal Year:
2024,
Volume and Issue:
17(15), P. 5451 - 5460
Published: Jan. 1, 2024
A
COF
has
been
successfully
fabricated
onto
carbon
nanotubes
as
a
cathode
in
LIBs
with
high
energy
density
of
737.5
W
h
g
−1
,
representing
the
highest
one
among
thus
far
reported
LIB
cathodes.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 4, 2024
Abstract
The
separators
used
in
lithium‐sulfur
(Li–S)
batteries
play
a
crucial
role
their
cycling
performance
and
safety.
Current
commercial
lack
the
ability
to
efficiently
regulate
polysulfide
shuttling
are
prone
thermal
runaway
at
high
temperatures.
Recent
studies
have
shown
that
multifunctional
can
boost
electrochemical
safety
of
Li–S
batteries.
Metal–organic
frameworks
(MOFs)
emerged
as
promising
materials
for
modifying
due
large
specific
surface
areas
highly
ordered
tunable
nanopores.
Herein,
this
review
focuses
on
advancements
developing
MOFs,
derivatives,
MOFs‐based
composites
separator
coatings
address
shortcomings
mechanisms
behind
these
modified
separators,
designed
inhibit
lithium
dendrite
growth,
discussed,
emphasizing
relationship
between
structure
performance.
impact
battery
is
also
explored,
aiming
design
suitable
composite
films
high‐safety
Furthermore,
future
perspectives
outlined
guide
practical
applications
overcome
remaining
challenges
associated
with
MOFs‐modified
separators.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(7), P. 4532 - 4541
Published: Feb. 8, 2024
Here,
we
present
the
synthesis
and
characterization
of
a
novel
2D
crystalline
framework,
named
C2O,
which
mainly
consists
carbon
oxygen
in
2:1
molar
ratio
features
crown
ether
holes
its
skeletal
structure.
The
covalent-frameworked
can
be
synthesized
on
gram-scale
exhibits
fine
chemical
stability
various
environments,
including
acid,
base,
different
organic
solvents.
C2O
efficiently
activates
KI
through
strong
coordination
K+
with
rigid
enhances
nucleophilicity
I–
significantly
improves
catalytic
activity
for
CO2
fixation
epoxides.
presence
results
remarkable
increases
conversion
from
5.7%
to
99.9%
2.9%
74.2%
epichlorohydrin
allyl
glycidyl
ether,
respectively.
Moreover,
possesses
both
electrophilic
nucleophilic
sites
at
edge
allowing
customization
physicochemical
properties
by
diverse
range
modifications.
Specifically,
incorporating
(AGE)
as
an
electrophile
or
ethoxyethylamine
(EEA)
nucleophile
into
enables
C2O-AGE
C2O-EEA,
These
modified
frameworks
exhibit
improved
conversions
97.2%
outperforming
unmodified
showing
74.2%.
This
newly
developed
scalable,
durable,
customizable
covalent
framework
holds
tremendous
potential
design
preparation
outstanding
materials
versatile
functionalities,
rendering
them
highly
attractive
wide
applications.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 6, 2024
During
the
reaction
process
in
lithium-sulfur
batteries,
Lewis
acidic
lithium
polysulfides
(LiPSs)
affect
ion
distribution
and
overall
electrolyte
stability,
degrading
battery
performance
product
(e.g.,
Li
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 25, 2025
Abstract
Lithium
(Li)
metal
has
gained
attention
as
an
anode
material
for
lithium‐metal
batteries
(LMBs)
owing
to
its
low
electrochemical
potential,
high
specific
capacity,
and
density.
However,
the
accumulation
of
Li
dendrites
unstable
solid
electrolyte
interphases,
caused
by
sluggish
+
migration
uneven
deposition,
limit
practical
LMB
applications.
This
study
presents
first
report
on
redox‐active
metal–covalent
organic
frameworks
(MCOFs)
with
dual‐active
centers
functional
separators
LMBs.
These
MCOFs
facilitate
homogeneous
nucleation
accelerate
ion
transport.
The
synergistic
effects
diarylamine
units
trinuclear
copper
clusters
modulate
local
electron‐cloud
density,
regulating
microenvironment
ions
ensuring
nucleation.
MCOF‐based
separator's
well‐defined
1D
channels
in
separator
enable
uniform
flux,
promote
resulting
transference
number
0.93
ionic
conductivity
2.01
mS
cm
−1
at
room
temperature.
Li|Cu
cell
demonstrates
a
barrier
16
mV,
while
symmetric
exhibits
stable
plating/stripping
over
1600
h
0.5
mA
−2
.
When
coupled
LiFePO
4
cathodes,
assembled
capacity
retention
≈98%.
work
paves
way
dendrite‐free
anodes
high‐performance
