ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
12(45), С. 16744 - 16758
Опубликована: Окт. 31, 2024
The
development
of
aqueous
zinc–iodine
(Zn–I2)
batteries
is
plagued
by
long-term
cycling
stability,
mainly
caused
limited
iodine
loading,
polyiodide
shuttle,
and
uneven
Zn2+
deposition.
Herein,
a
unique
tree-ring-like
hierarchical
structure
constructed
polyaniline
(PANI)
nanofiber
arrays
reduced
graphene
oxide
(RGO)
was
designed
to
provide
the
nanopore
array
for
prestoring
ions
confine
conversion
reaction
as
well
promote
electron
ion
transport
along
PANI
nanofibers,
thereby
enhancing
capacity
durability
Zn–I2
batteries.
Meanwhile,
sulfonic
polyacrylamide/glycerol
(SPAM/Gly)
hydrogel
electrolyte
containing
ZnI2
additive
introduced
simultaneously
inhibiting
shuttle
side
reactions
on
Zn
anode
accompanied
excellent
antifreezing
properties
flexibility.
As
result,
assembled
flexible
battery
realized
remarkable
areal
2.3
mAh·cm–2
at
0.5
mA·cm–2
(corresponding
287.5
mAh·g–1)
maximum
energy
density
2.54
mWh·cm–2
high
mass
loading
8
mg·cm–2.
Consequently,
still
exhibited
0.784
over
6000
cycles
0.98
after
200
under
−20
°C
2
mA·cm–2.
Such
device
also
maintains
steady
supply
powering
electronic
gadget
during
deformations.
Energy Materials,
Год журнала:
2024,
Номер
4(4), С. 400046 - 400046
Опубликована: Янв. 1, 2024
Electrocatalytic
nitrate
reduction
reaction
(NITRR)
is
highly
desirable
for
remediating
(NO3-)
pollution
and
producing
ammonia
(NH3)
under
mild
conditions.
To
date,
great
efforts
have
been
made
to
fabricate
selective,
efficient,
stable
electrocatalysts
NITRR.
Among
the
numerous
strategies,
single-atom
catalysts
(SACs)
received
extensive
interest
investigations
due
their
cost-effective
maximum
atomic
utilization.
However,
further
development
of
SACs-based
NITRR
remains
hindered
by
a
poor
understanding
in-depth
mechanisms.
Consequently,
this
review
summarizes
recent
advances
SACs
NITRR,
including
Cu-SACs,
Fe-SACs,
Zn-SACs,
Co-SACs,
alloys.
In
addition,
characterization
techniques
pathways
are
presented
give
robust
Finally,
we
analyze
current
challenges
in
fabricating
while
key
factors
improving
performances
also
examined.
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(34), С. 22981 - 22989
Опубликована: Янв. 1, 2024
K
+
in
the
electrolyte
promoted
adsorption
of
NO
3
−
on
nano-crystal
nickel
catalyst
surface
and
generation
*H.
Consequently,
sluggish
reduction
was
ameliorated,
elevated
performance
NRA
obtained.
Angewandte Chemie,
Год журнала:
2024,
Номер
136(49)
Опубликована: Сен. 13, 2024
Abstract
There
has
been
a
growing
interest
in
developing
catalysts
to
enable
the
reversible
iodine
conversion
reaction
for
high‐performance
aqueous
zinc‐iodine
batteries
(AZIBs).
While
diatomic
(DACs)
have
demonstrated
superior
performance
various
catalytic
reactions
due
their
ability
facilitate
synergistic
charge
interactions,
application
AZIBs
remains
unexplored.
Herein,
we
present,
first
time,
DAC
comprising
Mn−Zn
dual
atoms
anchored
on
nitrogen‐doped
carbon
matrix
(MnZn−NC)
loading,
resulting
AZIB
with
capacity
of
224
mAh
g
−1
at
1
A
and
remarkable
cycling
stability
over
320,000
cycles.
The
electron
hopping
along
Mn−N−Zn
bridge
is
stimulated
via
spin
exchange
mechanism.
This
process
broadens
Mn
3d
xy
band
width
enhances
metallic
character
catalyst,
thus
facilitating
transfer
between
intermediates.
Additionally,
increased
occupancy
within
d‐orbital
Zn
elevates
Zn's
d‐band
center,
thereby
enhancing
chemical
interactions
MnZn−NC
I‐based
species.
Furthermore,
our
mechanism
demonstrates
potential
applicability
other
Metal‐Zn−NC
DACs
spin‐polarized
atoms.
Our
work
elucidates
clear
mechanistic
understanding
provides
new
insights
into
catalyst
design
AZIBs.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
12(45), С. 16744 - 16758
Опубликована: Окт. 31, 2024
The
development
of
aqueous
zinc–iodine
(Zn–I2)
batteries
is
plagued
by
long-term
cycling
stability,
mainly
caused
limited
iodine
loading,
polyiodide
shuttle,
and
uneven
Zn2+
deposition.
Herein,
a
unique
tree-ring-like
hierarchical
structure
constructed
polyaniline
(PANI)
nanofiber
arrays
reduced
graphene
oxide
(RGO)
was
designed
to
provide
the
nanopore
array
for
prestoring
ions
confine
conversion
reaction
as
well
promote
electron
ion
transport
along
PANI
nanofibers,
thereby
enhancing
capacity
durability
Zn–I2
batteries.
Meanwhile,
sulfonic
polyacrylamide/glycerol
(SPAM/Gly)
hydrogel
electrolyte
containing
ZnI2
additive
introduced
simultaneously
inhibiting
shuttle
side
reactions
on
Zn
anode
accompanied
excellent
antifreezing
properties
flexibility.
As
result,
assembled
flexible
battery
realized
remarkable
areal
2.3
mAh·cm–2
at
0.5
mA·cm–2
(corresponding
287.5
mAh·g–1)
maximum
energy
density
2.54
mWh·cm–2
high
mass
loading
8
mg·cm–2.
Consequently,
still
exhibited
0.784
over
6000
cycles
0.98
after
200
under
−20
°C
2
mA·cm–2.
Such
device
also
maintains
steady
supply
powering
electronic
gadget
during
deformations.
