Advanced Materials,
Год журнала:
2023,
Номер
35(44)
Опубликована: Июль 19, 2023
Sluggish
kinetics
and
parasitic
shuttling
reactions
severely
impede
lithium-sulfur
(Li-S)
battery
operation;
resolving
these
issues
can
enhance
the
capacity
retention
cyclability
of
Li-S
cells.
Therefore,
an
effective
strategy
featuring
core-shell-structured
Co/Ni
bimetal-doped
metal-organic
framework
(MOF)/sulfur
nanoparticles
is
reported
herein
for
addressing
problems;
this
approach
offers
unprecedented
spatial
confinement
abundant
catalytic
sites
by
encapsulating
sulfur
within
ordered
architecture.
The
protective
shells
exhibit
long-term
stability,
ion
screening,
high
lithium-polysulfide
adsorption
capability,
decent
multistep
conversion.
Additionally,
delocalized
electrons
MOF
endow
cathodes
with
superior
electron/lithium-ion
transfer
ability.
Via
multiple
physicochemical
theoretical
analysis,
resulting
synergistic
interactions
are
proved
to
significantly
promote
interfacial
charge-transfer
kinetics,
facilitate
conversion
dynamics,
inhibit
shuttling.
assembled
batteries
deliver
a
stable,
highly
reversible
marginal
decay
(0.075%
per
cycle)
400
cycles
at
0.2
C,
pouch-cell
areal
3.8
mAh
cm-2
200
under
loading,
as
well
remarkably
improved
performance.
Advanced Energy Materials,
Год журнала:
2022,
Номер
12(44)
Опубликована: Сен. 18, 2022
Abstract
Lithium–sulfur
batteries
are
one
of
the
most
promising
alternatives
for
advanced
battery
systems
due
to
merits
extraordinary
theoretical
specific
energy
density,
abundant
resources,
environmental
friendliness,
and
high
safety.
However,
sluggish
sulfur
reduction
reaction
(SRR)
kinetics
results
in
poor
utilization,
which
seriously
hampers
electrochemical
performance
Li–S
batteries.
It
is
critical
reveal
underlying
mechanisms
accelerate
SRR
kinetics.
Herein,
issues
reviewed.
The
conversion
pathways
initially
introduced
give
an
overview
SRR.
Subsequently,
recent
advances
catalyst
materials
that
can
summarized
detail,
including
carbon,
metal
compounds,
metals,
single
atoms.
Besides,
various
characterization
approaches
discussed,
be
divided
into
three
categories:
measurements,
spectroscopic
techniques,
calculations.
Finally,
conclusion
outlook
part
gives
a
summary
proposes
several
key
points
future
investigations
on
activities.
This
review
provide
cutting‐edge
insights
Advanced Materials,
Год журнала:
2022,
Номер
34(14)
Опубликована: Фев. 1, 2022
Seeking
an
electrochemical
catalyst
to
accelerate
the
liquid-to-solid
conversion
of
soluble
lithium
polysulfides
insoluble
products
is
crucial
inhibit
shuttle
effect
in
lithium-sulfur
(Li-S)
batteries
and
thus
increase
their
practical
energy
density.
Mn-based
mullite
(SmMn2
O5
)
used
as
a
model
for
sulfur
redox
reaction
show
how
design
rules
involving
lattice
matching
3d-orbital
selection
improve
performance.
Theoretical
simulation
shows
that
positions
Mn
O
active
sites
on
(001)
surface
are
good
match
with
those
Li
S
atoms
polysulfides,
resulting
tight
anchoring
each
other.
Fundamentally,
dz2
dx2
-y2
around
Fermi
level
found
be
strongly
coupling
p-orbitals
decreasing
overpotential.
Following
theoretical
calculation,
SmMn2
synthesized
interlayer
Li-S
battery.
The
resulted
battery
has
high
cycling
stability
over
1500
cycles
at
0.5
C
more
promisingly
areal
capacity
7.5
mAh
cm-2
achieved
loading
≈5.6
mg
under
condition
low
electrolyte/sulfur
(E/S)
value
≈4.6
µL
mg-1
.
Advanced Energy Materials,
Год журнала:
2022,
Номер
12(39)
Опубликована: Авг. 3, 2022
Abstract
Lithium‐sulfur
batteries
hold
great
potential
for
next‐generation
energy
storage
systems,
due
to
their
high
theoretical
density
and
the
natural
abundance
of
sulfur.
Although
much
progress
has
been
achieved
recently,
low
actual
LiS
is
still
key
challenge
in
implementing
practical
applications.
Because
greatly
depends
on
areal
capacity
sulfur
cathodes,
content
loading
play
an
important
role
meeting
conditions
necessary
Therefore,
escalating
cathodes
essential
promote
technology
from
laboratory‐scale
devices
industrial
(or
commercial)
systems.
In
this
review,
recent
(>4
mg
cm
−2
)
highlighted
various
aspects,
including
hosts,
binders,
separators,
interlayers.
particular,
hosts
derived
carbon,
polymer,
transition
metal
oxide/
sulfide,
metal‐organic
framework,
other
novel
materials,
which
can
loading,
are
discussed
detail.
Moreover,
unique
free‐standing
structures
configurational
innovation
separators
interlayers
overviewed.
Based
current
achievements,
future
efforts
developing
high‐loading
proposed
pave
way
commercial
Advanced Materials,
Год журнала:
2021,
Номер
34(2)
Опубликована: Окт. 8, 2021
Lithium-sulfur
(Li-S)
batteries
are
considered
as
one
of
the
most
promising
next-generation
rechargeable
owing
to
their
high
energy
density
and
cost-effectiveness.
However,
sluggish
kinetics
sulfur
reduction
reaction
process,
which
is
so
far
insufficiently
explored,
still
impedes
its
practical
application.
Metal-organic
frameworks
(MOFs)
widely
investigated
a
immobilizer,
but
interactions
catalytic
activity
lithium
polysulfides
(LiPs)
on
metal
nodes
weak
due
presence
organic
ligands.
Herein,
strategy
design
quasi-MOF
nanospheres,
contain
transition-state
structure
between
MOF
oxide
via
controlled
ligand
exchange
strategy,
serve
electrocatalyst,
presented.
The
not
only
inherits
porous
MOF,
also
exposes
abundant
act
active
sites,
rendering
strong
LiPs
absorbability.
reversible
deligandation/ligandation
impact
durability
catalyst
over
course
electrochemical
process
acknowledged,
confers
remarkable
activity.
Attributed
these
structural
advantages,
delivers
decent
discharge
capacity
low
capacity-fading
rate
long-term
cycling.
This
work
offers
insight
into
rational
quasi-MOF-based
composites
provides
guidance
for
application
in
Li-S
batteries.
ACS Energy Letters,
Год журнала:
2022,
Номер
8(1), С. 116 - 150
Опубликована: Ноя. 22, 2022
A
high
sulfur
loading
is
an
essential
prerequisite
for
the
practical
application
of
lithium–sulfur
batteries.
However,
it
will
inevitably
exacerbate
shuttling
effect
and
slow
down
polysulfide
conversion
kinetics.
To
obtain
desirable
electrochemical
performance
at
a
level
loading,
adsorption
catalysis
dual
strategies
are
widely
reported
to
solve
severe
sluggish
reaction
kinetics
issues.
This
review
mainly
summarizes
research
on
batteries
with
(>5
mg
cm–2)
based
adsorption–catalysis
promotion
strategies.
Specifically,
we
principle
technical
challenges
recent
advancements
in
electrode
materials
design,
as
well
potential
approaches
suggestions
constructing
next-generation
loading.
provide
guidance
energy
density
power
under
offer
better
reference
researchers
choose
adsorbents
catalysts.
Advanced Energy Materials,
Год журнала:
2022,
Номер
12(18)
Опубликована: Март 16, 2022
Abstract
Lithium–sulfur
batteries
(LSBs)
are
regarded
as
promising
next‐generation
energy
storage
systems
owing
to
their
remarkable
theoretical
density
(2600
Wh
kg
‐1
)
and
low
cost.
However,
sluggish
electrochemical
kinetics,
lithium
polysulfides
(LiPS)
shuttling,
uncontrollable
Li
dendrite
growth
seriously
hamper
the
commercial
application
of
LSBs.
Herein,
dual‐functional
3D
interconnected
free‐standing
fibers
embedded
with
TiO
2
‐TiN
heterostructures
an
advanced
skeleton
designed
for
concurrently
regulating
both
sulfur
cathode
(S/hollow
‐TiN)
anode
(Li/solid
‐TiN).
As
a
skeleton,
hollow
afford
synergistic
functions
chemical
anchoring,
physical
confinement,
excellent
electrocatalysis
LiPS.
Meanwhile,
multifunctional
lithiophilicity
high
conductivity
can
accomplish
uniform
deposition
homogeneous
ion
flux
inhibiting
dendrites.
Benefiting
from
these
advantages,
full
battery
||
Li/solid
exhibits
performance,
including
cycling
stability
(988.8
mAh
g
−1
after
200
cycles
at
0.5
C)
impressive
rate
properties
(639.3
C).
This
work
inaugurates
novel
strategy
experimental
aspects
fabricating
LSBs
robust
performance.
