Li-ion
batteries
(LIBs)
are
considered
extremely
promising
for
electrical
energy
storage
systems.
However,
there
certain
challenges
in
choosing
anode
materials
with
higher
conductivity
and
longer
cycle
life
practical
applications.
In
this
work,
a
novel
two-dimensional
(2D)
porous
monolayer,
namely
F,Si-co-doped
covalent
triazine
framework
(F,Si@CTF0),
was
designed
using
density
functional
theory
(DFT)
calculations.
The
results
demonstrated
that
the
co-doping
of
F
Si
atoms
on
CTF0
surface
creates
more
accessible
adsorption
sites
adsorption.
analysis
confirmed
stability
F,Si@CTF0
which
exhibits
notable
(-3.53
eV)
at
site
A
(between
atoms).
monolayer
can
potentially
accommodate
five
Li-ions,
providing
high
theoretical
specific
capacity
462
mAh
g-1
(comparable
to
graphite
commonly
employed
commercial
LIBs)
positive
redox
potential
2.9
V.
transforms
from
being
semiconducting
metallic,
reflecting
electronic
conductivity.
Moreover,
undergoes
minor
lattice
variations
(-1.3%)
throughout
lithiation/delithiation
process,
demonstrating
excellent
cycling
performance.
Finally,
diffuses
rapidly
small
diffusion
barrier
0.078
eV.
These
highlight
use
as
material
next-generation
LIBs.
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 21, 2025
Abstract
Redox‐active
porous
organic
polymers
(POPs)
have
emerged
as
promising
and
sustainable
cathode
materials
(OCMs)
for
lithium‐ion
batteries
(LIBs).
However,
their
performance
is
significantly
limited
by
insufficient
redox‐active
sites
low
intrinsic
conductivity.
Herein,
a
series
of
novel
arylamine‐linked
bipolar
POPs
(denoted
HATN‐AQ,
HATN‐BQ,
HATN‐CBD,
HATN‐PTO)
are
designed
prepared
OCMs
LIBs.
Benefiting
from
high
density
sites,
feature,
arylamine
linkage,
these
exhibited
capacity,
rate,
excellent
long‐term
cycling
stability.
Among
them,
HATN‐PTO
displayed
an
ultrahigh
reversible
capacity
329.6
mAh
g
−1
at
0.2
A
with
energy
716.7
Wh
kg
,
outstanding
rate
(208.7
20
),
superior
stability
(188.9
retained
after
500
cycles
1
).
Furthermore,
the
HATN‐PTO//graphite
full
battery
specific
227.3
maintained
99.1
200
0.5
.
Ex
situ
FT‐IR
XPS
spectra
combined
theoretical
calculations
employed
to
elucidate
dual‐ion
storage
mechanism.
This
work
provides
effective
strategy
designing
high‐capacity
high‐rate
OCMs.
Owing
to
the
abundant
resources,
environmental
benignity,
structural
designability,
and
reasonable
theoretical
capacity,
organic
electrode
compounds
are
considered
be
an
excellent
substitute
for
traditional
inorganic
materials,
which
can
applied
in
green
sustainable
recharge
batteries.
Consequently,
materials
have
received
considerable
attention
over
past
decade,
numerous
polymeric
been
prepared
as
high-efficiency
Among
them,
conjugated
ladder-type
porous
polymer
networks
(PPNs)
with
intralayer
π-conjugation,
interlayer
π-π
stacking
interactions,
rigid
backbones
emerged
attractive
platforms
rechargeable
This
review
summarizes
linkage
chemistry,
synthesis
methods,
typical
structure
of
ladder
PPNs,
redox
activity
linkage,
their
applications
secondary
Further,
approaches
enhance
performance
efficiency
these
presented.
The
potential
battery
PPNs
also
discussed.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(29), С. 20183 - 20192
Опубликована: Июль 13, 2024
Polymer-based
organic
cathode
materials
have
shown
immense
promise
for
lithium
storage,
owing
to
their
structural
diversity
and
functional
group
tunability.
However,
designing
appropriate
high-performance
with
a
high-rate
capability
long
cycle
life
remains
significant
challenge.
It
is
quintessential
design
polymer-based
electrodes
lithiophilic
linkages.
Herein,
we
bifurcated
dibenzamide
(DBA)
linkage
having
functionalities.
