Abstract
Catalysts
for
zinc‐air
batteries
(ZABs)
must
be
stable
over
long‐term
charging‐discharging
cycles
and
exhibit
bifunctional
catalytic
activity.
In
this
study,
by
doping
nitrogen‐doped
carbon
(NC)
materials
with
three
metal
atoms
(Fe,
Ni,
Cu),
a
single‐atom‐distributed
FeNiCu‐NC
catalyst
is
prepared.
The
includes
Fe(Ni‐doped)‐N
4
the
oxygen
evolution
reaction
(OER),
Fe(Cu‐doped)‐N
reduction
(ORR),
NiCu‐NC
structure
(ORR)
in
nanoparticles.
This
single‐atom
distribution
enhances
If
trimetallic
designed,
it
will
surpass
typical
bimetallic
catcalyst.
exhibits
outstanding
performance
as
an
electrocatalyst,
half‐wave
potential
(
E
1/2
)
of
0.876
V
versus
RHE,
overpotential
j
=
10
253
mV
RHE
at
mA
cm
−2
,
small
gap
ΔE
0.61
V).
As
anode
ZAB,
can
undergo
continuous
charge‐discharged
575
h
without
significant
attenuation.
study
presents
new
method
achieving
high‐performance,
low‐cost
ZABs
via
doping.
Advanced Energy Materials,
Год журнала:
2024,
Номер
14(7)
Опубликована: Янв. 14, 2024
Abstract
Zinc–air
batteries
(ZABs)
hold
potential
as
clean,
cost‐effective,
and
sustainable
energy
storage
system
for
the
next
generation.
However,
application
of
ZABs
remains
challenging
because
their
poor
rechargeability
low
efficiency
.
The
design
efficient
bifunctional
catalysts
toward
oxygen
reduction
reaction
(ORR)
during
discharging
evolution
(OER)
charging
is
essential
to
developing
rechargeable
ZABs.
Transition
metal
(TM)‐doped
carbon
(TM‐C)
materials
stand
out
from
all
available
due
excellent
specific
surface
area,
diverse
morphological
structures
,
multiple
active
sites
formed
after
TM
doping.
This
paper,
therefore,
focuses
on
synthesis,
electrochemical
properties,
mechanism
TM‐C
catalysts.
To
make
a
novelty
logical
statement,
voltage
difference
(Δ
E
=
i
10
−
1/2
)
between
ORR/OER
catalytic
process
employed
categorize
different
reported
in
recent
years,
which
are
divided
into
two
groups:
I
0.7
0.9
V)
II
0.5
V).
mechanisms
clarified.
More
ways
ideas
synthesizing
high‐performance
also
provided.
Finally,
current
problem
prospects
this
group
presented.
Abstract
In
this
study,
Co/Ni‐NC
catalyst
with
hetero‐diatomic
Co/Ni
active
sites
dispersed
on
nitrogen‐doped
carbon
matrix
is
synthesized
via
the
controlled
pyrolysis
of
ZIF‐8
containing
Co
2+
and
Ni
compounds.
Experimental
characterizations
theoretical
calculations
reveal
that
are
atomically
uniformly
in
pairs
CoN
4
‐NiN
an
intersite
distance
≈0.41
nm,
there
long‐range
d
–
coupling
between
more
electron
delocalization
for
higher
bifunctional
activity.
Besides,
situ
grown
nanotubes
at
edges
particles
allow
high
electronic
conductivity
electrocatalysis
process.
Electrochemical
evaluations
demonstrate
superior
ORR
OER
bifunctionality
a
narrow
potential
gap
only
0.691
V
long‐term
durability,
significantly
prevailing
over
single‐atom
Co‐NC
Ni‐NC
catalysts
benchmark
Pt/C
RuO
2
catalysts.
catalyzed
Zn–air
batteries
achieve
specific
capacity
771
mAh
g
−1
long
continuous
operation
period
up
to
340
h
small
voltage
≈0.65
V,
also
much
Pt/C‐RuO
.
Journal of Materials Chemistry A,
Год журнала:
2022,
Номер
10(31), С. 16369 - 16389
Опубликована: Янв. 1, 2022
This
paper
discusses
the
challenges
and
solutions
for
zinc–air
batteries
in
practical
mass
production
applications
provides
a
more
reasonable
structure
power
batteries.
Journal of Magnesium and Alloys,
Год журнала:
2022,
Номер
10(10), С. 2699 - 2716
Опубликована: Окт. 1, 2022
Magnesium
(Mg)
batteries
(MBs),
as
post-lithium-ion
batteries,
have
received
great
attention
in
recent
years
due
to
their
advantages
of
high
energy
density,
low
cost,
and
safety
insurance.
However,
the
formation
passivation
layers
on
surface
Mg
metal
anode
poor
compatibility
between
conventional
electrolytes
during
charge-discharge
cycles
seriously
affect
performance
MBs.
The
possibility
generating
dendrites
has
also
caused
controversy
among
researchers.
Moreover,
regulation
deposition
enhancement
battery
cycle
stability
is
largely
limited
by
interfacial
electrolyte.
In
this
review,
advances
science
engineering
MBs
are
summarized
discussed.
Special
given
chemistry
including
layer
formation,
incompatibilities,
ion
transport,
dendrite
growth.
Strategies
for
building
stable
electrode/interfaces,
such
designing
electrolyte
modification,
construction
artificial
solid
interphase
(SEI)
layers,
development
solid-state
improve
contacts
inhibit
reviewed.
Innovative
approaches,
representative
examples,
challenges
developing
high-performance
anodes
described
detail.
Based
review
these
strategies,
reference
provided
future
research
MBs,
especially
terms
interface
design.
Molecules,
Год журнала:
2022,
Номер
27(3), С. 761 - 761
Опубликована: Янв. 24, 2022
Carbon-based
nanocomposites
have
developed
as
the
most
promising
and
emerging
materials
in
nanoscience
technology
during
last
several
years.
They
are
microscopic
that
range
size
from
1
to
100
nanometers.
may
be
distinguished
bulk
by
their
size,
shape,
increased
surface-to-volume
ratio,
unique
physical
chemical
characteristics.
Carbon
nanocomposite
matrixes
often
created
combining
more
than
two
distinct
solid
phase
types.
The
were
constructed
exhibit
properties,
such
significantly
enhanced
toughness,
mechanical
strength,
thermal/electrochemical
conductivity.
As
a
result
of
these
advantages,
been
used
variety
applications,
including
catalysts,
electrochemical
sensors,
biosensors,
energy
storage
devices,
among
others.
This
study
focuses
on
usage
forms
carbon
nanomaterials,
aerogels,
nanofibers,
graphene,
nanotubes,
fullerenes,
development
hydrogen
fuel
cells.
These
cells
successfully
employed
numerous
commercial
sectors
recent
years,
notably
car
industry,
due
cost-effectiveness,
eco-friendliness,
long-cyclic
durability.
Further;
we
discuss
principles,
reaction
mechanisms,
cyclic
stability
also
new
strategies
future
challenges
related
viable
Advanced Functional Materials,
Год журнала:
2023,
Номер
33(35)
Опубликована: Май 10, 2023
Abstract
Flexible
Zn–air
batteries
(FZABs)
have
attracted
more
attention
due
to
their
high
specific
energy,
excellent
stability,
and
unique
rechargeability.
However,
these
are
limited
by
the
low
conductivity
of
gel
electrolytes
used.
Here
a
quasi‐liquid
with
ionic
comparable
liquid
is
presented.
The
pore
structure
guided
modified
in
situ
large‐size
silica
achieve
clear
unbroken
pores.
reduced
skeleton
leads
significant
increase
562.6
mS
cm
−1
,
enabling
peak
power
density
154
mW
−2
cycle
life
over
40
h
charge–discharge
gap.
FZABs
also
exhibit
lifetime
potential
advantages
10
mA
charge/discharge
testing,
demonstrate
performance
practical
applications.
This
study
offers
new
possibilities
for
developing
high‐performance
gels
innovative
concepts
FZABs.
