Electrochemistry Communications,
Год журнала:
2024,
Номер
165, С. 107760 - 107760
Опубликована: Май 20, 2024
Rechargeable
zinc-air
batteries
have
been
identified
as
promising
technologies
for
energy
storage.
However,
developing
cost-effective
electrocatalysts
that
can
efficiently
facilitate
the
oxygen
evolution
reaction
(OER)
and
reduction
(ORR)
is
crucial
their
advancement.
This
work
investigates
synthesized
composed
of
graphene-Cu2O
deposited
on
carbon
cloth
by
doctor
blading
casting
method
bifunctional
electrodes
in
a
rechargeable
Zn-air
battery.
The
battery
integrated
with
air-cathode
electrocatalyst
showed
superior
performance
terms
cycling
stability
compared
to
without
Cu2O.
enhanced
attributed
reversibility
Cu+/Cu2+
species
during
redox
reactions
facilitated
high
electrical
conductivity
graphene.
Therefore,
results
suggest
potential
advancing
development
batteries.
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.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 3, 2025
Abstract
Oxygen
electrocatalysis
is
a
core
reaction
in
renewable
energy
devices,
greatly
promoting
the
transformation
and
upgrading
of
structure.
Nonetheless,
performance
conversion
devices
hindered
by
large
overpotential
slow
kinetics
oxygen
electrocatalytic
reactions.
Recently,
single‐atom
catalysts
(SACs)
have
emerged
as
promising
contenders
field
because
their
exceptional
metal
atom
utilization,
distinctive
coordination
environment,
adjustable
electronic
properties.
This
review
presents
latest
advancements
design
Co‐based
SACs
for
electrocatalysis.
First,
OER
ORR
mechanisms
are
introduced.
Subsequently,
strategies
regulating
structure
summarized
three
aspects,
including
centers,
support
carriers.
A
particular
emphasis
given
to
relationship
between
properties
catalysts.
Afterward,
applications
explored.
Ultimately,
challenges
prospects
prospected.
ACS Applied Engineering Materials,
Год журнала:
2024,
Номер
2(7), С. 1894 - 1907
Опубликована: Июнь 28, 2024
Fuel
cells
have
emerged
as
a
promising
alternative
to
conventional
energy
sources
due
their
high
conversion
efficiency
and
low
environmental
impact.
However,
the
development
of
efficient
cost-effective
catalysts
for
fuel
cell
electrodes
remains
significant
challenge.
Carbon
quantum
dots
(CQDs)
candidates,
with
unique
electronic
optical
traits,
excellent
electrochemical
activity,
cost-effectiveness.
We
synthesized
CQD
investigated
its
structural
transformation
into
carbon
nanoneedles
through
N
F
codoping,
employing
an
innovative
approach
enhance
efficiency,
particularly
in
field
oxygen
electrochemistry.
This
process
maximizes
defects,
reduces
band
gap
from
2.52
1.34
eV,
enhances
charge
distribution
lattice,
which
facilitates
easy
e–
transfer,
studied
density
functional
theory
analysis.
Notably,
N/F-CQD
catalyst
exhibits
exceptional
durability,
maintaining
∼23
mV
degradation
after
30000
cycles,
showcasing
robustness
prolonged
operational
conditions
finding
suitability
practical
applications.
Moreover,
peak
power
90
mW
cm–2
at
load
current
∼230
mA
under
ambient
pressure
temperature
50–55
°C,
emphasizing
potential
nonmetallic
catalyst.
The
introduction
N/F
codoping
demonstrates
promise
enhancing
behavior,
paving
way
nonmetal
cathodic
reduction
reaction
(ORR)
electrocatalyst
anion-exchange
membrane
Flexible
rechargeable
Zn-air
batteries
(FZABs)
exhibit
high
energy
density,
ultra-thin,
lightweight,
green,
and
safe
features,
are
considered
as
one
of
the
ideal
power
sources
for
flexible
wearable
electronics.
However,
slow
overpotential
oxygen
reaction
at
air
cathode
has
become
key
factors
restricting
development
FZABs.
The
improvement
activity
stability
bifunctional
catalysts
a
top
priority.
At
same
time,
FZABs
should
maintain
battery
performance
under
different
bending
twisting
conditions,
design
overall
structure
is
also
important.
Based
on
understanding
three
typical
configurations
working
principles
FZABs,
this
work
highlights
two
common
strategies
applying
to
FZABs:
1)
powder-based
2)
self-supported
cathode.
It
summarizes
recent
advances
in
electrocatalysts
explores
various
types
catalyst
structures
well
related
mechanistic
understanding.
latest
research
advances,
paper
introduces
discusses
modulation
expects
guide
synthesis
preparation
efficient
catalysts.
Finally,
current
status
challenges
summarized.
