Abstract
Modulating
lattice
strain
in
intermetallic
compounds
could
effectively
alter
their
electronic
structure
and
binding
energy,
thus
impacting
catalytic
activity.
Strain
is
usually
induced
through
mismatch,
achieved
by
constructing
core‐shell
nanostructures
or
metal‐substrate
interfaces
with
complex
reciprocity
distractors.
However,
situ
without
interface‐construction
mismatch
presents
challenges.
In
this
study,
we
precisely
manipulate
consecutive
compressive
from
−0.5%
to
−0.8%
CoPt
3
Pd
compound
inducing
interior
atomic
radius
mismatch.
Precise
control
results
a
negative
shift
of
d‐band
center,
dynamic
charge
distribution,
facilitates
water
dissociation,
leading
enhanced
electrocatalytic
The
catalyst
exhibits
exceptional
hydrogen
evolution
activity,
an
overpotential
169
mV
at
1
A
cm
−2
.
Our
approach
offers
straightforward
method
on
size
broad
implications
for
processes.
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 14, 2024
Lithium-sulfur
batteries
(LSB)
with
high
theoretical
energy
density
are
plagued
by
the
infamous
shuttle
effect
of
lithium
polysulfide
(LPS)
and
sluggish
sulfur
reduction/evolution
reaction.
Extensive
research
is
conducted
on
how
to
suppress
effects,
including
physical
structure
confinement
engineering,
chemical
adsorption
strategy,
design
redox
catalysts.
Recently,
rational
mitigate
effects
enhance
reaction
kinetics
based
field
has
been
widely
studied,
providing
a
more
fundamental
understanding
interactions
species.
Herein,
focused
their
methods
mechanisms
interaction
summarized
systematically
LPS.
Overall,
working
principle
LSB
system,
origin
effect,
kinetic
trouble
in
briefly
described.
Then,
mechanism
application
materials
concepts
external
field-assisted
elaborated,
electrostatic
force,
built-in
electric
field,
spin
state
regulation,
strain
magnetic
photoassisted
other
strategies
pivotally
elaborated
discussed.
Finally,
potential
directions
enhancing
performance
weakening
high-energy
anticipated.
ACS Nano,
Год журнала:
2024,
Номер
18(27), С. 17774 - 17785
Опубликована: Июнь 28, 2024
Lithium–sulfur
(Li–S)
batteries
are
promising
for
next-generation
high-energy
energy
storage
systems.
However,
the
slow
reaction
kinetics
render
mobile
polysulfides
hardly
controlled,
yielding
shuttling
effects
and
eventually
damaging
Li
metal
anodes.
To
improve
cyclability
of
Li–S
batteries,
high-efficiency
catalysts
desired
to
accelerate
polysulfide
conversion
suppress
effect.
Herein,
we
studied
a
doping
system
with
Ni2P
Ni2B
as
end
members
found
B-doped
catalyst
that
demonstrates
high
activity
batteries.
As
anionic
dopants,
B
an
interesting
reverse
electron
transfer
P
tunes
electronic
structure
dramatically.
The
resultant
exhibits
short
Ni–B
bonds
strong
Ni–S
interaction,
donation
further
enhances
adsorption
on
catalysts.
S–S
were
activated
appropriately,
therefore
decreasing
low
barrier
reactions.
Advanced Energy Materials,
Год журнала:
2024,
Номер
14(38)
Опубликована: Июнь 21, 2024
Abstract
Phase
engineering
is
considered
an
effective
strategy
to
regulate
the
electrocatalytic
activity
of
catalysts
for
Li–S
batteries
(LSBs).
However,
underlying
origin
phase‐dependent
catalytic
ability
remains
be
determined,
which
significantly
impedes
design
principles
high‐performance
materials
LSBs.
Herein,
heteroatom‐doped
can
trigger
phase
transformation
from
mixed‐phased
cubic
and
orthorhombic
cobalt
diselenide
into
pure
structure
with
a
tensile
strain
enhanced
charge
localization.
The
upshift
d
‐band
center
Bader
at
Se
sites
synergistically
strengthen
interaction
Li
S
in
polysulfide
species,
thus
endowing
transformed
P‐MoSe
2
/MXene
high
uniform
lithium
deposition
Consequently,
P‐CoSe
demonstrate
high‐rate
capability
603
mAh
g
−1
4C,
excellent
cyclability
652
1C
over
500
cycles
degradation
rate
0.076%
per
cycle.
work
provides
in‐depth
insight
fundamental
Advanced Science,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 16, 2024
The
"shuttle
effect"
issue
severely
hinders
the
practical
application
of
lithium-sulfur
(Li-S)
batteries,
which
is
primarily
caused
by
significant
accumulation
lithium
polysulfides
in
electrolyte.
Designing
effective
catalysts
highly
desired
for
enhancing
polysulfide
conversion
to
address
above
issue.
Here,
one-step
flash-Joule-heating
route
employed
synthesize
a
W-W
Abstract
The
shuttle
effect
and
sluggish
sulfur
conversion
kinetics
hamper
the
development
of
lithium–sulfur
batteries.
In
this
study,
Bi
2
Se
3
nanosheets
were
grown
in‐situ
directly
on
a
carbon
cloth
adopted
as
an
interlayer
in
batteries
to
accelerate
chemistry
kinetics.
topological
phase
can
effectively
anchor
soluble
species,
whereas
conductive
provides
electron
transport
pathways
for
adsorbed
polysulfides.
Such
synergetic
between
network
impedes
severe
lithium
polysulfides
accelerates
electrochemical
redox
reaction.
Benefiting
from
such
merits,
significantly
improved
specific
capacity
505
mAh
g
−1
at
4
C
cycling
stability
beyond
100
cycles
with
average
decay
rate
0.16
%
per
cycle
0.2
was
achieved
when
This
study
demonstrates
potential
implementation
materials
advanced
