Abstract
Aqueous
zinc‐ion
batteries
(AZIBs)
have
garnered
significant
attention
as
next‐generation
energy
storage
systems.
However,
developing
high‐energy‐density
cathode
materials
remains
a
critical
challenge.
Organic
compounds
with
multi‐electron
transfer
processes
offer
promising
solution
to
this
issue.
In
concept,
we
outline
the
fundamental
structural
principles
and
mechanisms
underlying
of
redox‐active
organic
compounds.
We
categorize
various
into
n‐type
,
p‐type
bipolar
compounds,
discuss
their
features,
redox
chemistry,
capacity
performance
in
AZIBs
by
analyzing
cyclic
voltammetry
profiles
charge
mechanisms.
Our
goal
is
valuable
insights
molecular
design
chemistry
achieve
high‐performance
AZIBs.
Abstract
Phenoxazine
is
a
commonly
used
molecular
building
block,
for
example
in
optoelectronic
applications
and
pharmaceuticals.
However,
it
highly
susceptible
to
rapid
photodegradation,
especially
halogenated
solvents.
In
the
present
study,
we
identify
degradation
products
both
non‐halogenated
solvents
by
UV/Vis
absorption,
NMR
spectroscopy
mass
spectrometry.
We
also
propose
substitution
strategy
aimed
at
effectively
suppressing
high
photoreactivity.
Kinetic
studies
show
that
quantum
yield
of
photodegradation
φ
differs
factor
more
than
1000
between
trisubstituted
derivatives
N‐substituted
phenoxazine.
Angewandte Chemie,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 5, 2024
Abstract
Multiple
redox‐active
amphoteric
organics
with
more
n‐p
fused
electron
transfer
is
an
ongoing
pursuit
for
superior
zinc–organic
batteries
(ZOBs).
Here
we
report
multi‐heterocycle‐site
donor‐acceptor
conjugated
organic
superstructures
(AOSs)
by
integrating
three‐electron‐accepting
n‐type
triazine
motifs
and
dual‐electron‐donating
p‐type
piperazine
units
via
H‐bonding
π–π
stacking.
AOSs
expose
flower‐shaped
N‐heteromacrocyclic
delocalization
topologies
to
promise
full
accessibility
of
built‐in
ultralow
activation
energy,
thus
liberating
capacity
(465
mAh
g
−1
)
Zn||AOSs
battery.
More
importantly,
the
extended
multiple
donor‐acceptor‐fused
feature
satisfied
discharge
voltage
anti‐dissolution
in
electrolytes,
pushing
both
energy
density
cycle
life
ZOBs
a
new
level
(412
Wh
kg
70,000
cycles@10
A
).
An
anion–cation
hybrid
18
e
−
charge
storage
mechanism
rationalized
heteromacrocyclic
modules
cathode,
entailing
six
tert‐N
coupling
CF
3
SO
ions
at
high
potential
twelve
imine
sites
coordinating
Zn
2+
low
potential.
These
findings
constitute
major
advance
multielectron
materials
stand
good
starting
point
advanced
ZOBs.
Abstract
Aqueous
zinc‐ion
batteries
(AZIBs)
have
garnered
significant
attention
as
next‐generation
energy
storage
systems.
However,
developing
high‐energy‐density
cathode
materials
remains
a
critical
challenge.
Organic
compounds
with
multi‐electron
transfer
processes
offer
promising
solution
to
this
issue.
In
concept,
we
outline
the
fundamental
structural
principles
and
mechanisms
underlying
of
redox‐active
organic
compounds.
We
categorize
various
into
n‐type
,
p‐type
bipolar
compounds,
discuss
their
features,
redox
chemistry,
capacity
performance
in
AZIBs
by
analyzing
cyclic
voltammetry
profiles
charge
mechanisms.
Our
goal
is
valuable
insights
molecular
design
chemistry
achieve
high‐performance
AZIBs.
