Small,
Journal Year:
2024,
Volume and Issue:
21(6)
Published: Dec. 29, 2024
Abstract
Li‐O
2
batteries
urgently
needs
high
discharge
capacity
and
stable
cycling
performance,
requiring
effective
reliable
bifunctional
catalysts
for
the
oxygen
reduction
reaction
(ORR)
evolution
(OER).
Herein,
Hovenia
acerba
Lindl
‐like
heterostructure
composed
of
cobalt
sulfide
tin
dioxide
supported
on
carbon
substrate
(CoS/SnO
@C)
is
prepared
via
CO
laser
irradiation
technology.
The
half‐wave
potential
CoS/SnO
@C
ORR
0.88
V,
while
overpotential
OER
at
10
mA
cm
−2
as
low
270
mV.
employing
catalyst
displays
a
specific
3332.25
mAh
g
−1
long
life
226
cycles.
Additionally,
theory
calculations
demonstrate
that
construction
decreases
energy
barrier
rate‐determining
step
(RDS)
both
OER.
Notably,
SnO
behaves
electronic
promoter
to
optimize
structure
interface
triggers
charge
redistribution
CoS,
which
weakens
adsorption
strength
*
O‐intermediates
allows
break
linear
scaling
relationship,
thus
further
enhancing
catalytic
performance
@C.
This
research
furnishes
directions
design
heterogeneous
catalysts,
highlighting
its
great
application
in
rechargeable
batteries.
Nano Express,
Journal Year:
2024,
Volume and Issue:
5(2), P. 022005 - 022005
Published: June 1, 2024
Abstract
Owing
to
great
energy
density,
eco-friendliness,
safety
and
security,
cost-effectiveness,
rechargeable
metal–air
batteries
(MABs)
have
engrossed
substantial
devotion.
The
MABs
signify
one
of
the
most
feasible
forthcoming
alternatives
powering
electric
vehicles
(EVs)
smart-grid
storage.
progress
has
offered
a
solution
benefitting
from
its
much
higher
theoretical
density
than
that
lithium-ion
(LIB).
However,
certain
technical
difficulties
allied
with
include
sluggish
electrochemical
oxygen
reaction
kinetics
yet
be
fixed.
transition
single
metal
mixed
metals
sulfides
(TMS)
nanostructures
validated
an
advanced
electrocatalytic
reduction
(ORR)
evolution
(OER)
performance,
due
their
electronic
conductivity
fast-charge
transfer
kinetics.
bifunctional
act
TMSs
can
enhanced
by
altering
configuration,
double
layer
structure
interface,
valence
state,
vacancies.
In
this
minireview,
preparation,
properties,
testing
electrode
components
nanomaterials
towards
different
types
(aqueous
non-aqueous),
fundamentals,
configuration
battery,
choice
materials,
electrolyte,
separator,
current
challenges
as
well
perspectives
design
high-performance
are
also
discussed
based
on
existing
execution.
Langmuir,
Journal Year:
2024,
Volume and Issue:
40(32), P. 17071 - 17080
Published: July 30, 2024
Transition
metals
(TMs)
supported
by
heteroatom-doped
carbon
materials
are
considered
to
be
the
potential
alternatives
Pt/C
catalyst
owing
their
low
cost,
outstanding
electrocatalytic
efficiency,
and
excellent
electrochemical
durability.
In
this
paper,
N/P-doped
nanotube
(CNT)
(N/P-CNT)-supported
monometallic
(Co,
Ni)
bimetallic
(CoNi)
catalysts
were
synthesized
one-step
pyrolysis
using
diammonium
hydrogen
phosphate,
2-methylimidazole
organometallic
salts
as
precursors,
CNT
carrier;
effects
of
transition
TM
types
temperature
(Tp)
on
microstructure
properties
explored.
The
analysis
exhibited
that
CoNi
was
superior
both
Co
Ni
catalysts,
pyrolyzed
at
900
°C
a
better
graphitization
degree.
optimal
CoNi-N/P-CNT-900
displayed
remarkable
oxygen
reduction
reaction
performance
with
half-wave
(E1/2)
0.86
V
methanol
tolerance
stability.
Moreover,
Zn-air
battery
coated
demonstrated
larger
open
circuit
voltage
1.577
V,
peak
power
density
212.89
mW
cm–2
357.8
mA
cm–2,
well
higher
specific
capacity
799
h
gZn–1,
(1.492
96.04
216.8
735
gZn–1),
showing
practical
value.
This
study
is
expected
promote
commercialization
electrocatalysts.
Langmuir,
Journal Year:
2024,
Volume and Issue:
40(32), P. 17038 - 17048
Published: Aug. 3, 2024
The
practical
application
of
Zn-air
batteries
require
exploring
cost-effective
and
durable
bifunctional
electrocatalysts.
However,
the
simultaneous
preparation
catalysts
with
activities
for
oxygen
reduction
reaction
(ORR)
precipitation
(OER)
remains
challenging.
Herein,
we
synthesized
a
novel
hybrid
catalyst
(FePc/NiCo/CNT),
which
couples
NiCo
alloy
FePc
through
electrostatic
interaction.
interaction
between
can
enhance
intrinsic
catalytic
activity
active
site
Fe-N
Advanced Science,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 14, 2024
Abstract
To
realize
the
practical
application
of
rechargeable
Zn–Air
batteries
(ZABs),
it
is
imperative
to
develop
a
non‐noble
metal‐based
electrocatalyst
with
high
electrochemical
performance
for
oxygen
reduction
reaction
(ORR)
and
evolution
(OER).
Herein,
Ni‐doped
Co
9
S
8
nanoparticles
dispersed
on
an
inverse
opal‐structured
N,
co‐doped
carbon
matrix
(IO─Ni
x
9‐x
@NSC)
as
bifunctional
presented.
The
unique
3D
porous
structure,
arranged
in
opal
pattern,
provides
large
active
surface
area.
Also,
conductive
substrate
ensures
homogeneous
dispersion
Ni
nanocrystals,
preventing
aggregation
increasing
exposure
sites.
introduction
heteroatom
dopants
into
structure
generates
defect
sites
enhances
polarity,
thereby
improving
electrocatalytic
alkaline
solutions.
Consequently,
IO─Ni
@NSC
shows
excellent
activity
half‐wave
potential
0.926
V
ORR
low
overpotential
289
mV
at
10
mA
cm
−2
OER.
Moreover,
ZAB
assembled
prepared
exhibits
higher
specific
capacity
(768
mAh
g
Zn
−1
),
peak
power
density
(180.2
mW
outstanding
stability
(over
160
h)
compared
precious
electrocatalyst.
