ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 3, 2024
Organic
electrode
materials
(OEMs)
have
attracted
much
attention
for
rechargeable
batteries
due
to
their
low
cost,
environment
friendliness,
flexibility,
and
structural
versatility.
Despite
the
above
advantages,
high
solubility
in
electrolyte
electronic
conductivity
remain
critical
limitations
application
of
OEMs.
In
this
work,
conjugated
organic
polymer
(COP)
poly([5,10,15,20-tetrakis(4-phenylalkynyl)porphyrin]Cu(II))
(PCuTPEP)
is
proposed
as
a
cathode
performance
lithium
batteries.
The
polymerization
inhibits
dissolution
electrodes
electrolyte,
porphyrin
ethynyl-phenyl
groups
greatly
expand
system
result
average
discharge
plateau
at
4.0
V
(vs
Li
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.
Abstract
Rationally
designed
organic
redox‐active
materials
have
attracted
numerous
interests
due
to
their
excellent
electrochemical
performance
and
reasonable
sustainability.
However,
they
often
suffer
from
poor
cycling
stability,
intrinsic
low
operating
potential,
rate
performance.
Herein,
a
novel
Donor–Acceptor
(D–A)
bipolar
polymer
with
n
‐type
pyrene‐4,5,9,10‐tetraone
unit
storing
Li
cations
p
carbazole
which
attracts
anions
provides
polymerization
sites
is
employed
as
cathode
for
lithium‐ion
batteries
through
in
situ
electropolymerization.
The
multiple
redox
reactions
boosted
kinetics
by
the
D–A
structure
lead
of
high
discharge
capacity
202
mA
h
g
−1
at
200
,
impressive
working
potential
(2.87
4.15
V),
an
outstanding
capability
119
10
A
noteworthy
energy
density
up
554
Wh
kg
.
This
strategy
has
significant
implications
molecule
design
stability
density.
Abstract
Metal–organic
coordination
polymers
(MOPs)
comprised
of
redox‐active
organic
moieties
and
metal
ions
emerge
as
an
important
class
electroactive
materials
for
battery
applications.
The
bipolar
two
transition
metal‐based
(Fe
Co)
complexes
bearing
terpyridine‐triphenylamine
ligand
are
used
models
to
investigate
the
relationships
between
structure
electrochemical
performance.
It
turned
out
that
choice
central
atom
has
a
profound
influence
on
practical
voltage
window
specific
capacity.
high‐performing
poly(FeL)
n
electrode
exhibits
reversible
capacity
272.5
mAh
g
−1
after
100
cycles
at
50
mA
,
excellent
cycling
stability
up
4000
5A
(capacity
ration:83.1%),
rate
poly(CoL)
significantly
lower
107
100th
cycle
inferior
(54
retention:
38.7%).
DFT
analysis
indicates
center
directly
influences
electron
cloud
density
metal‐terpyridine
structure,
which
in
turn
affects
redox
activity
polymer
by
varying
affinity
lithium
charge
transfer
efficiency.
These
findings
highlight
importance
centers
polymers,
providing
direct
guidance
exploration
MOPs
novel
resource‐friendly
cathode
materials.
Processes,
Год журнала:
2025,
Номер
13(1), С. 232 - 232
Опубликована: Янв. 15, 2025
Dual-ion
batteries
(DIBs)
were
demonstrated
as
a
promising
technology
for
large-scale
energy
storage
due
to
their
low
cost,
recyclability,
and
impressively
fast
charge
capability.
Graphite
commonly
used
cathode
material
in
DIBs,
however,
suffers
from
poor
compatibility
with
commercial
Li-ion
electrolytes
graphite
anodes,
making
it
difficult
directly
utilize
the
well-established
infrastructure
batteries.
Herein,
we
report
small
aromatic
amine
molecule
4,4′,4″-tris(diphenylamino)triphenylamine
(N4)
functioning
compatible
anion
host
EC-containing
electrolyte.
With
an
average
discharge
voltage
of
3.6
V
(vs.
Li+/Li),
N4
electrode
delivers
reversible
specific
capacity
108
mAh/g,
which
is
much
higher
than
29
mAh/g
at
same
condition.
The
high
retention
91.3%
was
achieved
after
500
cycles
1
A/g.
also
exhibited
good
rate
performance.
Via
different
characterization
techniques
like
Fourier
transform
infrared
spectroscopy
X-ray
photoelectron
spectroscopy,
mechanism
revealed
conversion
between
quaternary
cations,
accompanied
by
PF6−
(de-)insertion.
As
consequences,
assembled
N4||graphite
DIB
w
showed
90
within
1.5–4.1
V,
cycling
stability
98%
40
cycles.
Decent
performance
well.
This
work
provides
new
insights
into
designing
affordable
DIBs.
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(48), С. 33624 - 33631
Опубликована: Янв. 1, 2024
PTPA-AQ,
an
in
situ
electropolymerized
bipolar
organic
cathode
for
sodium
dual-ion
batteries,
achieving
426
Wh
kg
−1
energy
density
after
300
cycles
at
0.2
A
g
−
¹,
with
3000
cycle
stability
5
¹
and
14.9
kW
power
density.
