ACS Applied Nano Materials,
Год журнала:
2024,
Номер
7(7), С. 7172 - 7183
Опубликована: Март 21, 2024
Lithium–sulfur
(Li–S)
batteries
have
received
continuous
attention
due
to
their
high
theoretical
specific
capacity.
However,
the
shuttle
effect
of
lithium
polysulfides
(LiPSs)
severely
limits
its
development.
Modification
commercial
polypropylene
(PP)
separators
is
regarded
as
an
effective
strategy
suppress
effect.
In
this
paper,
NiFe-PBA-derived
carbon-based
porous
bimetallic
phosphide
(NFP)
was
inserted
into
carbon
nanotube
(CNT)
networks,
and
these
composites
were
utilized
modify
PP
separator.
CNT
networks
provide
abundant
pathways
electron
transport
improve
conductivity
S
cathode
Li2S.
Ni2P
Fe2P
in
NFP
exhibit
robust
chemisorption
catalytic
effects
on
LiPSs.
Moreover,
structures
beneficial
for
Li+
immigration.
The
synergistic
enable
modified
separator
obtain
a
electrical
conductivity,
superior
adsorption
capability,
enhanced
performance.
Assembled
Li–S
show
initial
discharge
capacity
1244
mAh
g–1
at
0.2
C.
Notably,
highest
discharge-specific
reached
up
938.9
1
C,
average
decay
rate
per
cycle
after
300
cycles
mere
0.067%.
This
study
paves
way
research
pathway
harnessing
transition
metal
phosphides
materials
separators,
offering
realize
high-performance
batteries.
Industrial & Engineering Chemistry Research,
Год журнала:
2023,
Номер
62(10), С. 4356 - 4363
Опубликована: Март 7, 2023
Oxygen
evolution
reaction
(OER)
is
the
bottleneck
of
electrocatalytic
water
splitting
due
to
its
sluggish
proton-coupled
four-electron-transfer
kinetics.
Interface
engineering
has
been
regarded
as
an
effective
strategy
promote
OER
performance
transition-metal
oxide
(TMO)
electrocatalysts.
In
this
study,
we
successfully
construct
amorphous–crystalline
interfaces
NiFePx/NiFeOx
nanosheets
with
substantial
oxygen
vacancies
through
controllable
surface
phosphorization.
Experimental
results
confirm
that
unique
structure
possesses
fast
charge
transfer,
abundant
active
sites,
and
enhanced
intrinsic
activity,
resulting
in
outstanding
performance.
The
optimized
displays
a
low
overpotential
238
mV
at
20
mA
cm–2
excellent
stability
1
M
KOH
electrolyte.
This
study
provides
TMOs
alkaline
splitting.
Abstract
Herein,
we
have
designed
a
highly
active
and
robust
trifunctional
electrocatalyst
derived
from
Prussian
blue
analogs,
where
Co
4
N
nanoparticles
are
encapsulated
by
Fe
embedded
in
N‐doped
carbon
nanocubes
to
synthesize
hierarchically
structured
N@Fe/N–C
for
rechargeable
zinc–air
batteries
overall
water‐splitting
electrolyzers.
As
confirmed
theoretical
experimental
results,
the
high
intrinsic
oxygen
reduction
reaction,
evolution
hydrogen
reaction
activities
of
were
attributed
formation
heterointerface
modulated
local
electronic
structure.
Moreover,
induced
improvement
these
electrocatalytic
owing
hierarchical
hollow
nanocube
structure,
uniform
distribution
N,
conductive
encapsulation
Fe/N–C.
Thus,
battery
with
delivers
specific
capacity
789.9
mAh
g
−1
stable
voltage
profiles
over
500
cycles.
Furthermore,
water
electrolyzer
achieved
better
durability
rate
performance
than
that
Pt/C
IrO
2
catalysts,
delivering
Faradaic
efficiency
96.4%.
Along
great
potential
integrated
powered
practical
applications,
therefore,
mechanistic
understanding
site
identification
provide
valuable
insights
into
rational
design
advanced
multifunctional
electrocatalysts
energy
storage
conversion.
