ACS Applied Energy Materials,
Год журнала:
2024,
Номер
7(8), С. 3061 - 3070
Опубликована: Апрель 10, 2024
Developing
highly
efficient
electrocatalysts
toward
oxygen
reduction
reaction
is
significant
for
Zn–air
battery
(ZAB),
which
still
arduous.
In
this
work,
based
on
a
metal
vacancy
strategy,
we
synthesized
an
atomically
dispersed
Zn,
Fe
dual-atom
catalyst
N-doped
carbon
(Zn,
Fe/NC)
by
pyrolyzing
the
ZIF-8,
postadsorbing
Fe3+,
and
second
pyrolysis
steps.
Due
to
introduction
of
atoms,
obtained
Fe/NC-800
displays
outstanding
performance
in
alkaline
electrolyte
(half-wave
potential:
0.881
V),
approaches
closely
that
commercial
Pt/C
(0.903
V).
Theoretical
calculations
indicate
excellent
activity
Zn
can
be
attributed
integration
atoms
effectively
optimizes
rate-limiting
step.
also
presents
robust
durability
strong
methanol
tolerance.
Moreover,
ZAB
assembled
with
delivers
charge–discharge
cycling
life
(550
h)
at
10
mA
cm–2
without
noticeable
decay.
Furthermore,
even
show
glorious
flexible
adaptability
when
employed
as
cathode
ZAB.
Nature Communications,
Год журнала:
2023,
Номер
14(1)
Опубликована: Апрель 1, 2023
Abstract
Anion-exchange
membrane
fuel
cells
and
Zn–air
batteries
based
on
non-Pt
group
metal
catalysts
typically
suffer
from
sluggish
cathodic
oxygen
reduction.
Designing
advanced
catalyst
architectures
to
improve
the
catalyst’s
reduction
activity
boosting
accessible
site
density
by
increasing
loading
utilization
are
potential
ways
achieve
high
device
performances.
Herein,
we
report
an
interfacial
assembly
strategy
binary
single-atomic
Fe/Co-N
x
with
mass
loadings
through
constructing
a
nanocage
structure
concentrating
high-density
Fe/Co–N
sites
in
porous
shell.
The
prepared
FeCo-NCH
features
distribution
as
7.9
wt%
of
around
7.6
×
10
19
g
−1
,
surpassing
most
reported
M–N
catalysts.
In
anion
exchange
zinc–air
batteries,
material
delivers
peak
power
densities
569.0
or
414.5
mW
cm
−2
3.4
2.8
times
higher
than
control
devices
assembled
FeCo-NC.
These
results
suggest
that
present
for
promoting
catalytic
offers
new
possibilities
exploring
efficient
low-cost
electrocatalysts
boost
performance
various
energy
devices.
Nano-Micro Letters,
Год журнала:
2024,
Номер
16(1)
Опубликована: Фев. 29, 2024
Zinc-air
batteries
(ZABs)
are
gaining
attention
as
an
ideal
option
for
various
applications
requiring
high-capacity
batteries,
such
portable
electronics,
electric
vehicles,
and
renewable
energy
storage.
ZABs
offer
advantages
low
environmental
impact,
enhanced
safety
compared
to
Li-ion
cost-effectiveness
due
the
abundance
of
zinc.
However,
early
research
faced
challenges
parasitic
reactions
at
zinc
anode
slow
oxygen
redox
kinetics.
Recent
advancements
in
restructuring
anode,
utilizing
alternative
electrolytes,
developing
bifunctional
catalysts
have
significantly
improved
ZABs.
Scientists
achieved
battery
reversibility
over
thousands
cycles,
introduced
new
efficiency
records
surpassing
70%.
Despite
these
achievements,
there
related
lower
power
density,
shorter
lifespan,
air
electrode
corrosion
leading
performance
degradation.
This
review
paper
discusses
different
configurations,
reaction
mechanisms
electrically
mechanically
rechargeable
ZABs,
proposes
remedies
enhance
overall
performance.
The
also
explores
recent
advancements,
applications,
future
prospects
electrically/mechanically
Advanced Materials,
Год журнала:
2024,
Номер
36(24)
Опубликована: Март 16, 2024
Zinc-based
batteries
(ZBBs)
have
demonstrated
considerable
potential
among
secondary
batteries,
attributing
to
their
advantages
including
good
safety,
environmental
friendliness,
and
high
energy
density.
However,
ZBBs
still
suffer
from
issues
such
as
the
formation
of
zinc
dendrites,
occurrence
side
reactions,
retardation
reaction
kinetics,
shuttle
effects,
posing
a
great
challenge
for
practical
applications.
As
promising
porous
materials,
covalent
organic
frameworks
(COFs)
derivatives
rigid
skeletons,
ordered
structures,
permanent
porosity,
which
endow
them
with
application
in
ZBBs.
This
review,
therefore,
provides
systematic
overview
detailing
on
COFs
structure
pertaining
electrochemical
performance
ZBBs,
following
an
depth
discussion
challenges
faced
by
includes
dendrites
reactions
at
anode,
well
dissolution,
structural
change,
slow
effect
cathode.
Then,
COF-correlated
materials
roles
various
are
highlighted.
Finally,
outlined
outlook
future
development
is
provided.
The
review
would
serve
valuable
reference
further
research
into
utilization
Energy & Environmental Science,
Год журнала:
2024,
Номер
17(5), С. 1725 - 1755
Опубликована: Янв. 1, 2024
This
article
summarizes
the
regulation
strategies
of
Fe-based
MOFs-derived
electrocatalysts
for
ZABs,
and
provides
a
prospect
their
future
development.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(22)
Опубликована: Март 30, 2023
Iron
phthalocyanine-based
polymers
(PFePc)
are
attractive
noble-metal-free
candidates
for
catalyzing
oxygen
reduction
reaction
(ORR).
However,
the
low
site-exposure
degree
and
poor
electrical
conductivity
of
bulk
PFePc
restricted
their
practical
applications.
Herein,
laminar
nanosheets
covalently
longitudinally
linked
to
graphene
(3D-G-PFePc)
was
prepared.
Such
structural
engineering
qualifies
3D-G-PFePc
with
high
site
utilization
rapid
mass
transfer.
Thence,
demonstrates
efficient
ORR
performance
a
specific
activity
69.31
μA
cm-2
,
81.88
A
g-1
turnover
frequency
0.93
e
s-1
site-1
at
0.90
V
vs.
reversible
hydrogen
electrode
in
O2
-saturated
0.1
M
KOH,
outperforming
lamellar
wrapped
counterpart.
Systematic
electrochemical
analyses
integrating
variable-frequency
square
wave
voltammetry
situ
scanning
microscopy
further
underline
kinetics
towards
ORR.
Advanced Materials,
Год журнала:
2024,
Номер
36(26)
Опубликована: Фев. 20, 2024
Abstract
The
rational
construction
of
highly
active
and
durable
oxygen‐reactive
electrocatalysts
for
oxygen
reduction/evolution
reaction
(ORR/OER)
plays
a
critical
role
in
rechargeable
metal‐air
batteries.
It
is
pivotal
to
achieve
optimal
utilization
electrocatalytically
sites
valid
control
the
high
specific
internal
surface
area.
Inspiration
designing
can
come
from
nature,
as
it
full
precisely
manipulated
efficient
structures.
Herein,
inspired
by
earthworms
fertilizing
soil,
3D
carbon
nanofibrous
electrocatalyst
with
multiple
interconnected
nanoconfined
channels,
cobalt‐based
heterojunction
particles
enriched
N,
S
heteroatoms
(Co/Co
3
O
4
/CoF
2
@NSC
confined
channels)
rationally
designed,
showing
superior
bifunctional
electrocatalytic
activity
alkaline
electrolyte,
even
outperforming
that
benchmark
Pt/C‐RuO
catalyst.
This
work
demonstrates
new
method
porous
structural
regulation,
which
channels
within
nanofibers
are
controllably
formed
spontaneous
migration
nanoparticles
under
CO
atmosphere.
Theoretical
analysis
reveals
constructing
Co/Co
greatly
adjust
electron
distribution,
effectively
lower
barrier
inter‐mediate
reduce
OER/ORR
overpotential.
introduces
novel
nature‐inspired
strategy
well‐designed
architectures.
Abstract
For
the
advancement
of
electrochemical
energy
conversion
and
storage
technologies,
bifunctional
electrocatalysts
are
crucial
for
efficiently
driving
both
oxygen
evolution
(OER)
reduction
reactions
(ORR).
Cobalt‐based
spinel
oxides
a
class
promising
electrocatalysts.
However
their
low
electrical
conductivity
stability
may
hinder
further
improvement.
A
novel
composite
material
composed
NiCo
2
O
4
nanoparticles
integrated
with
emerging
two
dimensional
MXene
nanosheets
(NiCo
/MXene)
was
developed.
The
successful
integration
brings
about
number
attractive
structural
features.
This
includes
synergistic
effects
between
MXene,
highly
accessible
surface
areas,
complete
exposure
numerous
active
sites,
excellent
electronic
conductivity,
all
which
collectively
contribute
to
desirability
OER
ORR.
synthesized
/MXene
showed
extraordinary
electrocatalytic
activity
lower
overpotential
360
mV
at
current
density
10
mA/cm
,
small
Tafel
slope
64
mV/dec
compared
+MXene
(physically
mixed).
Additionally,
displays
an
ORR
limiting
−4
exhibited
highest
onset
potential
half
wave
0.92
V
0.72
vs.
RHE,
respectively,
in
alkaline
media
Green Carbon,
Год журнала:
2024,
Номер
2(2), С. 221 - 230
Опубликована: Апрель 1, 2024
The
rational
design
of
Fe-N-C
catalysts
that
possess
easily
accessible
active
sites
and
favorable
mass
transfer,
which
are
usually
determined
by
the
structure
catalyst
supports,
is
crucial
for
oxygen
reduction
reaction
(ORR).
In
this
study,
an
oleic
acid-assisted
soft-templating
approach
developed
to
synthesize
size-controlled
nitrogen-doped
carbon
nanoparticles
(ranging
from
130
nm
60
35
nm,
respectively)
feature
spiral
mesopores
on
their
surface
(SMCs).
Next,
atomically
dispersed
Fe-Nx
fabricated
size-tunable
SMCs
(Fe1/SMC-x,
where
x
represents
SMC
size)
size-dependent
activity
toward
ORR
investigated.
It
found
catalytic
performance
Fe1/SMCs
significantly
influenced
size
SMCs,
Fe1/SMC-60
shows
highest
with
a
half-wave
potential
0.90
V
vs.
RHE
in
KOH
electrolyte,
indicating
gas-liquid-solid
three-phase
interface
enhances
accessibility
sites.
addition,
when
using
as
cathode
aqueous
zinc-air
batteries
(ZABs),
it
delivers
higher
open-circuit
voltage
(1.514
V),
greater
power
density
(223
mW
cm-2),
larger
specific
capacity/energy
than
Pt/C-based
counterparts.
These
results
further
highlight
practical
energy
devices
associated
importance
synthesis
SMCs.
ACS Nano,
Год журнала:
2024,
Номер
18(33), С. 21651 - 21684
Опубликована: Авг. 12, 2024
In
order
to
facilitate
electrochemical
oxygen
reactions
in
electrically
rechargeable
zinc-air
batteries
(ZABs),
there
is
a
need
develop
innovative
approaches
for
efficient
electrocatalysts.
Due
their
reliability,
high
energy
density,
material
abundance,
and
ecofriendliness,
ZABs
hold
promise
as
next-generation
storage
conversion
devices.
However,
the
large-scale
application
of
currently
hindered
by
slow
kinetics
reduction
reaction
(ORR)
evolution
(OER).
development
heterostructure-based
electrocatalysts
has
potential
surpass
limitations
imposed
intrinsic
properties
single
material.
This
Account
begins
with
an
explanation
configurations
fundamentals
electrochemistry
air
electrode.
Then,
we
summarize
recent
progress
respect
variety
heterostructures
that
exploit
bifunctional
electrocatalytic
overview
impact
on
ZAB
performance.
The
range
heterointerfacial
engineering
strategies
improving
ORR/OER
performance
includes
tailoring
surface
chemistry,
dimensionality
catalysts,
interfacial
charge
transfer,
mass
transport,
morphology.
We
highlight
multicomponent
design
take
these
features
into
account
create
advanced
highly
active
catalysts.
Finally,
discuss
challenges
future
perspectives
this
important
topic
aim
enhance
activity
batteries.
