Angewandte Chemie,
Год журнала:
2024,
Номер
136(48)
Опубликована: Авг. 28, 2024
Abstract
Monocomponent
catalysts
exhibit
the
limited
catalytic
conversion
of
polysulfides
due
to
their
intrinsic
electronic
structure,
but
activity
can
be
improved
by
introducing
heteroatoms
regulate
its
structure.
However,
rational
selection
principles
doping
elements
remain
unclear.
Here,
we
are
guided
theoretical
calculations
select
suitable
based
on
balanced
relationship
between
adsorption
strength
lithium
(LiPSs)
and
sulfide.
We
apply
screening
method
develop
a
new
catalyst
phosphorus
doped
RuSe
2
,
manifesting
further
enhanced
conductivity
compared
with
original
facilitating
charge
transfer
modulating
d‐band
center
thereby
augmenting
effectiveness
in
interacting
LiPSs.
Consequently,
assembled
cell
exhibits
an
areal
capacity
7.7
mAh
cm
−2
even
under
high
sulfur
loading
8.0
mg
lean
electrolyte
condition
(5.0
μL
−1
).
This
strategy
offers
robust
solution
for
design
advanced
field
lithium‐sulfur
batteries
potentially
other
domains
as
well.
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 9, 2024
Rechargeable
lithium
metal
batteries
(LMBs)
are
promising
next-generation
energy
storage
systems
due
to
their
high
theoretical
density.
However,
practical
applications
hindered
by
dendrite
growth
and
various
intricate
issues
associated
with
the
cathodes.
These
challenges
can
be
mitigated
using
organosulfur-based
mediators
(OSMs),
which
offer
advantages
of
abundance,
tailorable
structures,
unique
functional
adaptability.
features
enable
rational
design
targeted
functionalities,
enhance
interfacial
stability
anode
cathode,
accelerate
redox
kinetics
electrodes
via
alternative
reaction
pathways,
thereby
effectively
improving
performance
LMBs.
Unlike
extensively
explored
field
organosulfur
cathode
materials,
OSMs
have
garnered
little
attention.
This
review
systematically
summarizes
recent
advancements
in
for
LMB
systems,
including
lithium-sulfur,
lithium-selenium,
lithium-oxygen,
lithium-intercalation
batteries,
other
systems.
It
briefly
elucidates
operating
principles
these
regulatory
mechanisms
corresponding
OSMs,
fundamentals
activity.
Ultimately,
strategic
optimizations
proposed
designing
novel
advanced
mechanism
investigation,
expanded
applications,
development
safe
battery
providing
directions
narrow
gap
between
modulation
compounds
implementation
batteries.
Journal of Materials Chemistry C,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
MXene
nanosheets
were
prepared
using
an
HF-HCl
mixed
acid
etching
method
and
applied
as
separators
in
lithium–sulfur
batteries.
The
effect
of
different
intercalants
on
the
performance
batteries
was
investigated.
Currently,
most
catalysts
for
lithium-sulfur
batteries
suffer
from
some
shortcomings,
including
restricted
active
sites
and
poor
catalytic
kinetics.
Herein,
we
developed
an
advanced
catalyst
of
V-MXene@octahedral
porous
carbon
(MX@OPC),
which
features
a
"built-in
interfacial
electric
field"
(BIEF)
"dual-functional
sites"
(DCASs),
to
target
the
accelerated
rate-determining
step
in
polysulfide
redox
kinetics
dendrite-free
lithium
behaviors.
The
well-designed
heterointerface
forms
BIEF
due
differences
work
function
charge
distribution,
contributing
enhanced
electron
transfer
low
lithium-ion
diffusion
barriers.
DCASs
with
superior
Li2S4
desorption
efficiently
catalyze
conversion
Li2S2
by
distribution
relaxation
times
(DRT)
analysis
density
functional
theory
(DFT)
calculations.
V-MXene
exhibits
strong
lithophilicity,
facilitates
uniform
nucleation
growth
lithium.
As
result,
battery
MX@OPC
delivers
capacity
fade
rate
per
cycle
as
0.017%
over
1200
cycles
at
2
C.
Furthermore,
renders
Li||Li
symmetric
cell
maintain
stable
overpotential
16
mV
2500
h.
This
provides
inspiring
insights
into
directed
catalysis
generation
toward
accelerating
rate-determining-step
sulfur
deposition
Li-S
batteries.
Lithium-sulfur
batteries
(LSBs)
are
considered
as
the
potent
candidates
for
next-generation
energy
storage
systems
due
to
their
high
theoretical
density.
However,
some
inherent
problems,
including
sulfur
insulation,
shuttle
effect
caused
by
lithium
polysulfides,
and
dendrites,
hinder
practical
application.
Various
materials
have
been
studied
address
aforementioned
issues.
A
class
of
two-dimensional
inorganic
compounds
(MXenes),
such
transition
metal
carbides,
nitrides,
carbon
recently
emerged.
In
this
review,
we
summarize
characteristics
commonly
used
preparation
methods
MXenes
outline
latest
development
composites
in
LSBs.
When
utilized
carriers,
modified
layers
separators,
hosts
anodes,
electrolyte
additives
LSBs,
diversity
structure,
excellent
conductivity,
mechanical
strength
highlight
competitive
advantages.
This
review
provides
ideas
future
