Advanced Functional Materials,
Год журнала:
2023,
Номер
34(4)
Опубликована: Окт. 22, 2023
Abstract
Lithium–sulfur
batteries
with
high
energy
density
are
considered
to
be
one
of
the
most
promising
candidates
for
next‐generation
storage
devices.
Electrolyte
as
medium
Li
+
transportation
between
electrodes,
also
plays
a
crucial
role
in
inhibiting
dissolution
and
diffusion
lithium
polysulfides
Li–S
batteries.
The
working
mechanism
different
electrolytes
is
classified
into
“solid‐liquid‐solid”
“solid‐solid”
conversions.
Under
conversion,
would
inevitably
face
challenges
such
“shuttle
effect”
that
lead
poor
cycle
performance,
under
they
interface
mismatch
limits
utilization
sulfur
low
density,
while
both
conversion
mechanisms
cause
uncontrollable
dendrites
on
anode.
According
mechanism,
can
divided
ether‐based,
ionic
liquid‐based,
gel
polymer
electrolytes,
polymer‐based
solid‐state
well
carbonate‐based
oxide/sulfide‐based
conversion.
Based
active
materials
current
status
strategies
from
multiple
perspectives
summarized
improve
electrochemical
hope
provide
comprehensive
guideline
toward
development
suitable
Abstract
Lithium–sulfur
(Li–S)
batteries
have
been
considered
as
promising
battery
systems
due
to
their
huge
advantages
on
theoretical
energy
density
and
rich
resources.
However,
the
shuttle
effect
sluggish
transformation
of
soluble
lithium
polysulfides
(LiPSs)
hinder
practical
application
Li–S
batteries.
Tremendous
sulfur
host
materials
with
unique
catalytic
activity
exploited
inhibit
accelerate
LiPSs
redox
reactions,
in
which
simulations
widely
adopted.
This
review
aims
summarize
fundamentals
applications
models
cathodes.
Concretely,
integration
provides
insights
into
adsorption
conversion
mechanisms
is
further
utilized
smart
design
catalysts
for
exploitation
Finally,
a
perspective
future
combination
calculation
technology
provided.
Chemical Society Reviews,
Год журнала:
2023,
Номер
52(5), С. 1723 - 1772
Опубликована: Янв. 1, 2023
Defective
two-dimensional
(2D)
materials
show
huge
potential
for
energy-related
fields.
This
review
overviews
the
formation/evolution
mechanisms
and
engineering
strategies
of
defects
in
2D
materials,
which
enable
enhanced
electrode
reaction
kinetics.
ACS Nano,
Год журнала:
2022,
Номер
16(3), С. 4947 - 4960
Опубликована: Март 4, 2022
The
shuttle
effect
of
polysulfides
and
Li2S
sluggish
nucleation
are
the
major
problems
hampering
further
development
lithium-sulfur
batteries.
reasonable
design
for
sulfur
host
materials
with
catalytic
function
has
been
an
effective
strategy
promoting
polysulfide
conversion.
Compared
other
types
transition
metal
compounds,
borides
high
conductivity
capability
more
suitable
as
materials.
Herein,
a
niobium
diboride
(NbB2)
nanoparticle
abundant
high-efficiency
sites
synthesized
by
facile
solid-phase
reaction.
NbB2
both
nature
could
regulate
3D-nucleation
growth
Li2S,
decrease
reaction
energy
barrier,
accelerate
transformation
polysulfides.
Thus,
cathode
retain
capacity
1014
mAh
g-1
after
100
cycles.
In
addition,
initial
specific
capacities
703/609
also
achieved
at
5
C/10
C
run
1000/1300
cycles
within
low
decay
rate
0.057%/0.051%.
Even
loading
up
to
16.5
mg
cm-2,
areal
17
cm-2
be
0.1
C.
This
work
demonstrates
successful
method
enhancing
kinetics
conversion
directing
nucleation.
Angewandte Chemie International Edition,
Год журнала:
2021,
Номер
60(46), С. 24558 - 24565
Опубликована: Авг. 26, 2021
Witnessing
compositional
evolution
and
identifying
the
catalytically
active
moiety
of
electrocatalysts
is
paramount
importance
in
Li-S
chemistry.
Nevertheless,
this
field
remains
elusive.
We
report
scalable
salt-templated
synthesis
Se-vacancy-incorporated
MoSe2
architecture
(SeVs-MoSe2
)
reveal
phase
defective
precatalyst
working
batteries.
The
interaction
between
lithium
polysulfides
SeVs-MoSe2
probed
to
induce
transformation
from
MoSeS.
Furthermore,
operando
Raman
spectroscopy
ex
situ
X-ray
diffraction
measurements
combination
with
theoretical
simulations
verify
that
effectual
MoSeS
catalyst
could
help
promote
conversion
Li2
S2
S,
thereby
boosting
capacity
performance.
battery
accordingly
exhibits
a
satisfactory
rate
cycling
capability
even
elevated
sulfur
loading
lean
electrolyte
conditions
(7.67
mg
cm-2
;
4.0
μL
mg-1S
).
This
work
elucidates
design
strategies
catalytic
mechanisms
efficient
bearing
defects.
Advanced Energy Materials,
Год журнала:
2022,
Номер
12(12)
Опубликована: Фев. 10, 2022
Abstract
Lithium–sulfur
batteries
have
aroused
great
interest
in
the
context
of
rechargeable
batteries,
while
shuttle
effect
and
sluggish
conversion
kinetics
severely
handicap
their
development.
Defect
engineering,
which
can
adjust
electronic
structures
electrocatalyst,
thus
affect
surface
adsorption
catalytic
process,
has
been
recognized
as
a
good
strategy
to
solve
above
problems.
However,
research
on
phosphorus
vacancies
rarely
reported,
how
battery
performance
remains
unclear.
Herein,
CoP
with
(CoP‐Vp)
is
fabricated
study
enhancement
mechanism
Li–S
chemistry.
The
derived
CoP‐Vp
features
low
Co‐P
coordination
number
introduced
mainly
exist
form
clusters.
obtained
reinforce
affinity
lithium
polysulfides
(LiPSs)
be
restrained.
In
addition,
reduced
reaction
energy
barriers
promoted
diffusion
Li
+
accelerate
redox
kinetics.
Electrochemical
tests
situ
Raman
results
confirm
advantages
vacancies.
S/CNT‐CoP‐Vp
electrode
presents
outstanding
cycling
achieves
high
capacity
8.03
mAh
cm
−2
under
lean
electrolyte
condition
(
E
/S
=
5
μL
mg
−1
S
).
This
work
provides
new
insight
into
improving
through
defect
engineering.
ACS Nano,
Год журнала:
2021,
Номер
15(9), С. 13901 - 13923
Опубликована: Сен. 13, 2021
The
increasing
demand
for
wearable
electronic
devices
necessitates
flexible
batteries
with
high
stability
and
desirable
energy
density.
Flexible
lithium–sulfur
(FLSBs)
have
been
increasingly
studied
due
to
their
theoretical
density
through
the
multielectron
chemistry
of
low-cost
sulfur.
However,
implementation
FLSBs
is
challenged
by
several
obstacles,
including
low
practical
density,
short
life,
poor
flexibility.
Various
graphene-based
materials
applied
address
these
issues.
Graphene,
good
conductivity
flexibility,
exhibits
synergistic
effects
other
active/catalytic/flexible
form
multifunctional
materials,
which
play
a
pivotal
role
in
FLSBs.
This
review
summarizes
recent
progress
that
used
as
various
FLSB
components,
cathodes,
interlayers,
anodes.
Particular
attention
focused
on
precise
nanostructures,
graphene
efficacy,
interfacial
effects,
battery
layout
realizing
cycling
stability.
Abstract
As
one
of
the
most
promising
candidates
for
next‐generation
energy
storage
systems,
lithium‐sulfur
(Li‐S)
batteries
have
gained
wide
attention
owing
to
their
ultrahigh
theoretical
density
and
low
cost.
Nevertheless,
road
commercial
application
is
still
full
thorns
due
inherent
sluggish
redox
kinetics
severe
polysulfides
shuttle.
Incorporating
sulfur
cathodes
with
adsorbents/catalysts
has
been
proposed
be
an
effective
strategy
address
foregoing
challenges,
whereas
complexity
resulting
from
intricate
design
parameters
greatly
influences
corresponding
density,
which
frequently
ignored.
In
this
review,
recent
progress
in
strategies
advanced
summarized
significance
compatible
regulation
among
active
materials,
tailored
hosts,
elaborate
cathode
configuration
clarified,
aiming
bridge
gap
between
fundamental
research
practical
Li‐S
batteries.
The
representative
classified
by
encapsulation,
host
architecture,
are
first
highlighted
illustrate
synergetic
contribution
electrochemical
performance
improvement.
Feasible
integration
principles
also
guide
cathodes.
Finally,
prospects
future
directions
provided
realize
high
long‐life
