Nano-Micro Letters,
Год журнала:
2023,
Номер
16(1)
Опубликована: Ноя. 13, 2023
Abstract
Organic
electrode
materials
are
promising
for
batteries.
However,
the
reported
organic
electrodes
often
facing
challenges
of
low
specific
capacity,
voltage,
poor
rate
capability
and
vague
charge
storage
mechanisms,
etc.
Isomers
good
platform
to
investigate
mechanisms
enhance
performance
batteries,
which,
however,
have
not
been
focused
in
Herein,
two
isomers
As
a
result,
isomer
tetrathiafulvalene
(TTF)
could
store
monovalent
anions
reversibly,
deriving
an
average
discharge
voltage
1.05
V
capacity
220
mAh
g
−1
at
current
density
2
C.
On
other
hand,
tetrathianaphthalene
only
reversibly
one
anion
upon
further
oxidation,
it
would
undergo
irreversible
solid-state
molecular
rearrangement
TTF.
The
was
confirmed
by
electrochemical
performances,
X-ray
diffraction
patterns,
nuclear
magnetic
resonance
spectra,
1
H
detected
heteronuclear
multiple
bond
correlation
spectra.
These
results
suggested
small
structural
change
lead
big
difference
storage,
we
hope
this
work
will
stimulate
more
attention
design
boosting
Abstract
Organic
cathode
materials
for
aqueous
rechargeable
zinc
batteries
(ARZBs)
are
rapidly
gaining
prominence,
while
the
exploration
of
compounds
with
affordable
synthesis,
satisfactory
electrochemical
performance,
and
understandable
mechanisms
still
remains
challenging.
In
this
study,
6,8,15,17‐tetraaza‐heptacene‐5,7,9,14,16,18‐hexaone
(TAHQ)
as
an
easily
synthesized
organic
material
novel
quinone/pyrazine
alternately
conjugated
molecule
structure
is
presented.
This
electrode
exhibits
good
capacity
highly
reversible
redox
reactions,
influence
multi‐active
structures
on
Zn
2+
/H
+
loading
behavior
systematically
investigated
by
ex
situ
spectroscopy,
tests,
computation.
Both
experimental
theoretical
studies
effectively
address
intercalation/deintercalation
kinetics.
Benefitting
from
fused
active
functionalities,
assembled
Zn//TAHQ
battery
displays
a
maximum
discharge
specific
254.3
mAh
g
−1
at
0.5
A
,
it
maintains
remarkable
cycle
performance
71%
retention
after
1000
cycles
under
5
.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 9, 2024
Rational
design
of
molecular
structures
is
one
the
effective
strategies
to
obtain
high-performance
organic
cathode
materials.
However,
besides
optimization
single-molecule
structures,
influence
"weak"
interaction
forces
(e.g.
hydrogen
bonds)
in
materials
on
performance
batteries
should
be
fully
considered.
Herein,
three
small
molecules
with
different
numbers
hydroxyl
groups
(namely
nitrogen
heterocyclic
tetraketone
(DAB),
monohydroxyl
dione
(HDA),
dihydroxyl
(DHT))
were
selected
as
cathodes
aqueous
zinc
ion
(AZIBs),
and
effect
intermolecular
bonds
their
electrochemical
was
studied
for
first
time.
Clearly,
stable
hydrogen-bond
networks
built
through
significantly
enhance
cycle
stability
small-molecule
facilitate
rapid
proton
conduction
between
Grotthuss
mechanism,
thereby
endowing
them
excellent
rate
performance.
In
addition,
a
larger
more
dense
two-dimensional
network
can
constructed
multiple
groups,
further
enhancing
structural
cathodes,
giving
better
tolerance,
performance,
extreme
environmental
tolerance.
Journal of Materials Chemistry A,
Год журнала:
2023,
Номер
11(42), С. 22906 - 22912
Опубликована: Янв. 1, 2023
We
demonstrate
V
2
O
5
cathodes
with
benzoquinones
intercalation.
The
intercalated
BQ4Br
expands
lattices
and
improves
reaction
kinetics,
endowing
-BQ4Br
higher
capacity
cycle
stability.
Nano-Micro Letters,
Год журнала:
2023,
Номер
16(1)
Опубликована: Дек. 8, 2023
Organic
compounds
have
the
advantages
of
green
sustainability
and
high
designability,
but
their
solubility
leads
to
poor
durability
zinc-organic
batteries.
Herein,
a
high-performance
quinone-based
polymer
(H-PNADBQ)
material
is
designed
by
introducing
an
intramolecular
hydrogen
bonding
(HB)
strategy.
The
HB
(C=O⋯N-H)
formed
in
reaction
1,4-benzoquinone
1,5-naphthalene
diamine,
which
efficiently
reduces
H-PNADBQ
enhances
its
charge
transfer
theory.
In
situ
ultraviolet-visible
analysis
further
reveals
insolubility
during
electrochemical
cycles,
enabling
at
different
current
densities.
Specifically,
electrode
with
loading
(10
mg
cm
Nano-Micro Letters,
Год журнала:
2023,
Номер
16(1)
Опубликована: Ноя. 13, 2023
Abstract
Organic
electrode
materials
are
promising
for
batteries.
However,
the
reported
organic
electrodes
often
facing
challenges
of
low
specific
capacity,
voltage,
poor
rate
capability
and
vague
charge
storage
mechanisms,
etc.
Isomers
good
platform
to
investigate
mechanisms
enhance
performance
batteries,
which,
however,
have
not
been
focused
in
Herein,
two
isomers
As
a
result,
isomer
tetrathiafulvalene
(TTF)
could
store
monovalent
anions
reversibly,
deriving
an
average
discharge
voltage
1.05
V
capacity
220
mAh
g
−1
at
current
density
2
C.
On
other
hand,
tetrathianaphthalene
only
reversibly
one
anion
upon
further
oxidation,
it
would
undergo
irreversible
solid-state
molecular
rearrangement
TTF.
The
was
confirmed
by
electrochemical
performances,
X-ray
diffraction
patterns,
nuclear
magnetic
resonance
spectra,
1
H
detected
heteronuclear
multiple
bond
correlation
spectra.
These
results
suggested
small
structural
change
lead
big
difference
storage,
we
hope
this
work
will
stimulate
more
attention
design
boosting
