Carbon Nanotubes Coupled Bipolar Covalent Organic Frameworks With Nitrogen‐Enriched Redox‐Active Sites for High‐Performance Lithium‐Organic Batteries
Wei Huang,
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Nan Jiang,
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Gege Li
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et al.
Macromolecular Rapid Communications,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 12, 2025
Abstract
Covalent
organic
frameworks
(COFs)
are
frequently
explored
as
attractive
electrode
materials
for
next‐generation
sustainable
lithium‐ion
batteries.
Unfortunately,
such
metal‐free
suffer
from
low
practical
capacities
and
poor
rate
capabilities,
due
to
intrinsic
conductivity,
limited
redox‐active
sites,
insufficient
electrochemical
utilization.
Herein,
integrating
conductive
carbon
nanotubes
(CNTs)
with
bipolar‐type
COFs
enriched
by
multi‐electron
sites
is
rationally
crafted
in
situ
Schiff
base
condensation
fabricate
robust
core–shell
hierarchical
heterostructures
(CNT@COF).
Remarkably,
the
as‐fabricated
CNT@COF
cathode
delivers
a
large
reversible
capacity
(253.1
mAh
g
−1
at
0.2
A
),
high
capability
(161.6
mA
h
5
excellent
cycling
stability
(retaining
76.6%
of
initial
over
1000
cycles),
because
fast
ion/electron
transport
utilization
active
groups.
Accordingly,
both
spectroscopy
techniques
theoretical
calculations
employed
reveal
redox
reaction
mechanisms
COF
moieties
conversion
nitrogen‐containing
centers
(imine,
triazine,
triphenylamine)
against
PF
6
−
/Li
+
rationalized
clearly.
This
work
crafts
an
unusual
strategy
address
common
issues
polymer
electrodes
macromolecular
engineering
unlock
barrier
high‐capacity
high‐rate
storage
powerful
Language: Английский
Cu-mediated bipolar-type extended π-conjugated microporous polymers for lithium-ion battery cathode with high energy density and fast-charging capability
Yitao Li,
No information about this author
Ju Duan,
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Yuzhu Wang
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et al.
Chemical Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
A
Cu
2+
-mediated
bipolar-type
CMP
is
developed
to
maximize
abundant
active
site
utilization
and
enhance
ion
diffusion
kinetics
for
durable,
high
energy-density,
fast-charging
LIB
cathodes.
Language: Английский