ACS Applied Energy Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Май 15, 2024
The
development
of
anodes
with
fast
electron
and
ion
transport
is
indispensable
for
high-performance
lithium-ion
capacitors
(LICs).
In
this
work,
we
have
successfully
incorporated
chemically
exfoliated
HNb3O8
nanosheets
(E-HNb3O8)
into
PEDOT
aerogel
by
electrostatic
interactions
between
the
negatively
charged
E-HNb3O8
positively
PEDOT:PSS
through
a
facile
hydrothermal
method.
shortened
diffusion
lengths
offer
numerous
active
sites,
while
interconnected
skeleton
offers
continuous
conductive
pathways
rapid
transport.
Thereby,
PEDOT-E-HNb3O8
(PDT-Nb)
exhibits
large
specific
capacity
(217
mAh
g–1
at
0.1
A
g–1),
good
rate
capability
(63
1.0
decent
cycling
stability
(153
after
160
cycles
g–1).
LIC
fabricated
PDT-Nb50
as
anode
activated
carbon
cathode
provides
maximum
energy
density
64
Wh
kg–1,
retaining
66%
almost
100%
Coulombic
efficiency
over
5000
g–1.
Our
work
demonstrates
that
holds
great
potential
an
hybrid
capacitor.
Accounts of Chemical Research,
Год журнала:
2024,
Номер
57(19), С. 2887 - 2900
Опубликована: Сен. 16, 2024
ConspectusZinc-ion
batteries
(ZIBs)
are
highly
promising
for
large-scale
energy
storage
because
of
their
safety,
high
energy/power
density,
low
cost,
and
eco-friendliness.
Vanadium-based
compounds
attractive
cathodes
versatile
structures
multielectron
redox
processes
(+5
to
+3),
leading
capacity.
Layered
or
3-dimensional
open
tunnel
frameworks
allow
easy
movement
zinc-ions
without
breaking
the
structure
apart,
offering
superior
rate-performance.
However,
challenges
such
as
dissolution
phase
transformation
hinder
long-term
stability
vanadium-based
in
ZIBs.
Although
significant
research
has
been
dedicated
understanding
mechanisms
developing
high-performance
cathodes,
uncertainties
still
exist
regarding
critical
dissolution,
actual
active
specific
optimization
strategy.
For
example,
it
is
unclear
whether
materials
α-V
Applications
of
aqueous
zinc
ion
batteries
(ZIBs)
for
grid-scale
energy
storage
are
hindered
by
the
lacking
stable
cathodes
with
large
capacity
and
fast
redox
kinetics.
Herein,
intercalation
tetramethylammonium
(TMA
Abstract
The
parasitic
reactions
and
rampant
dendrite
growth
on
the
Zn
anode
side
pose
significant
obstacles
to
future
applications
of
aqueous
zinc
ion
batteries.
Herein,
a
lightweight
host
is
reported
by
introducing
nanosized
metallic
into
poly(3,4‐ethylenedioxythiophene):polystyrene
sulfonate
(PEDOT:PSS)
(P‐S)
aerogel
(Zn/P‐S).
‒SO
3
H
groups
interact
with
2+
guild
their
migrations
along
PSS
chains,
while
offer
additional
nucleation
sites
homogenize
electrical
concentration.
Owing
these
synergistic
effects,
uniform
dense
deposition
(002)
plane
aligned
parallel
P‐S
substrate
achieved,
even
at
high
plating
capacity
20
mAh
cm
−2
.
Moreover,
deposited
over
Zn/P‐S
(Zn@Zn/P‐S)
exhibits
highly
reversible
plating/stripping
behavior
Coulombic
efficiency
maintained
99%
700
cycles.
Consequently,
Zn@Zn/P‐S‐based
symmetric
Zn||Zn
cell
can
work
stably
500
h
0.5
‒2
100
4
depth
discharge
40%.
A
Zn@Zn/P‐S||NaV
O
8
full
battery
presents
rate
capability
82.2%
retention
after
1000
cycles
2
g
‒1
This
strategy
provides
novel
approach
for
designing
polymer‐based
anodes
corrosion‐resistant
dendrite‐free
striping/plating
behaviors.
Abstract
Aqueous
zinc‐ion
batteries
hold
great
potentials
for
large‐scale
grid
energy
storage.
However,
the
electrode
corrosion,
hydrogen
evolution,
and
dendrite
growth
of
Zn
anode
often
lead
to
cell
failure.
Herein,
N
groups
in
Ti
3
C
2
T
x
(NMXH)
are
introduced
as
interfacial
layer
through
hydrothermal
treatment
with
urea.
The
experimental
analysis
density
functional
theory
calculation
indicate
that
can
homogenize
electric
field
distribution,
promote
adsorption
2+
on
groups,
strength
interactions
between
atoms
(002)
plane.
Thereby,
use
NMXH
effectively
suppress
side
reactions
realize
uniform
deposition
along
As
a
consequence,
NMXH─Zn//Zn
exhibits
an
ultralow
nucleation
overpotential
(1
mA
cm
−2
,
18.9
mV)
stably
operate
1400
h
at
1
mAh
)
110
40
).
A
full
battery
V
O
5
nanowires
cathode
displays
discharge
capacity
219
g
−1
(1.0
),
decent
rate
capability
cyclability.
significant
role
reported
this
work
offers
promising
avenue
improve
cycling
stability
anodes
aqueous
zinc
batteries.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(32), С. 43026 - 43037
Опубликована: Авг. 2, 2024
The
aqueous
zinc-ion
batteries
(ZIBs)
have
gained
increasing
attention
because
of
their
high
specific
capacity,
low
cost,
and
good
safety.
However,
side
reactions,
hydrogen
evolution
reaction,
uncontrolled
zinc
dendrites
accompanying
the
Zn
metal
anodes
impeded
applications
ZIBs
in
grid-scale
energy
storage.
Herein,
poly(3,4-ethylenedioxythiophene)
(PEDOT)
nanowires
as
an
interfacial
layer
on
anode
(Zn-PEDOT)
are
reported
to
address
above
issues.
Our
experimental
results
density
functional
theory
simulation
reveal
that
interactions
between
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 10, 2024
Abstract
Zinc‐ion
batteries
(ZIBs)
show
great
promise
for
next‐generation
energy
storage,
but
their
performance
at
low
temperatures
is
severely
hindered
by
sluggish
desolvation
kinetics
cathode‐electrolyte
interface.
To
address
this
limitation,
a
zincophilic‐hydrophobic
poly(3,4‐ethylenedioxythiophene)
(PEDOT)
modified
layer
proposed
on
V
5
O
12
•6H
2
cathode.
Ab
initio
molecular
dynamics
simulations
indicate
that
modification
strategy
promotes
Zn
⁺
adsorption
and
reduces
the
free
dissociating
hydrated
2+
to
form
interface,
across
temperature
of
280
240
K.
As
result,
PEDOT‐modified
cathode
exhibits
significantly
improved
diffusion
kinetics,
delivering
superior
rate
with
remarkable
capacity
226.5
mAh
g⁻¹
40
A
g⁻¹.
Notably,
even
−30
°C,
maintains
high
268.3
mA
0.2
robust
retention
(92.4%)
over
1,000
cycles
1
This
approach
markedly
improves
low‐temperature
operational
efficiency,
highlighting
potential
interface
engineering
advance
zinc‐ion
in
cold
environments.
ACS Applied Polymer Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 19, 2025
Conductive
polymers
have
great
potential
applications
as
electrode
materials
for
supercapacitors
in
small
energy
storage
devices.
First,
manganese
sulfate
(MnSO4)
was
oxidized
to
dioxide
(MnO2)
microspheres
with
a
diameter
of
1.5–3.5
μm
by
catalysis
Ag+.
Subsequently,
polyaniline
(PANI)
grew
situ
on
the
surface
MnO2
dilute
solution
method,
using
self-degraded
template
an
acidic
environment.
The
gradually
reduced
Mn2+
because
acted
both
oxidant
and
polymerization
aniline,
resulting
formation
PANI
hollow
urchin-like
structure.
as-prepared
PANI,
its
high
specific
area
porous
properties,
considered
material
surface–interface
chemical
storage.
Therefore,
capacitance
could
reach
531
±
35
F/g
at
5
mV/s,
loss
41.0%
when
current
density
increased
from
1
10
A/g.
Further
analysis
charge
mechanism
revealed
that
controlled
slow
kinetics,
indicating
reaction
mainly
Faradaic
intercalation
process
inside
active
material.
A
symmetric
supercapacitor
device
also
assembled
microsphere
electrodes,
maximum
about
17.92
Wh/kg
power
500
W/kg.