ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(27), С. 35123 - 35133
Опубликована: Июнь 26, 2024
Lithium-sulfur
(Li-S)
batteries
have
high
theoretical
energy
density
and
are
regarded
as
a
promising
candidate
for
next-generation
storage
systems.
However,
their
practical
applications
hindered
by
the
slow
kinetics
of
sulfur
conversion
polysulfide
shuttling.
In
particular,
large-scale
pouch
cells
show
much
poor
cyclability.
Here,
we
develop
high-efficiency
catalyst
V-doped
CoSe2
studying
binary
CoSe2-VSe2
system
confirming
its
effectiveness
in
accelerating
conversion.
The
coin
cell
tests
reveal
an
initial
capacity
1414
mAh
g-1
at
0.1
C
1049
1
demonstrate
1000
times
cyclability
with
decaying
rate
0.05%
per
cycle.
Furthermore,
assembly
construction
were
optimized
monolithic
three-dimensional
(3D)
electrodes
multistacking
strategy.
Specifically,
3D
metallic
scaffold
(3MS)
was
developed
to
host
nanowires
sulfur.
addition,
Janus
microspheres
C@TiO2
synthesized
capture
polar
polysulfides
part
TiO2
adsorb
nonpolar
carbon.
By
integrating
3MS,
can
block
all
ion
channels
3MS
only
allow
Li
ions
out.
These
integral
designs
structures
enable
A
high-loading
demonstrated
total
700
mAh.
be
cycled
70
retention
65.7%.
brief,
this
work
provides
strategy
design
overall
Li-S
large
format.
Advanced Functional Materials,
Год журнала:
2023,
Номер
33(42)
Опубликована: Авг. 27, 2023
Abstract
Lithium–sulfur
(Li–S)
batteries
have
high
theoretical
energy
density
and
are
regarded
as
next‐generation
batteries.
However,
their
practical
is
much
lower
than
the
value.
In
previous
studies,
increase
of
areal
capacity
cathode
decrease
negative/positive
ratio
can
be
well
achieved,
yet
shows
no
corresponding
increase.
The
main
reason
difficulty
in
decreasing
electrolyte
dosage
because
lean
inevitably
causes
deterioration
reaction
kinetics
sulfur
utilization.
Thus,
electrolyte/active
material
reported
works
usually
higher
10
µL
mg
−1
,
that
Li‐ion
(usually
≈0.3
for
cathode).
Although
many
focused
on
this
topic,
a
systematic
discussion
still
rare.
This
review
systematically
discusses
key
challenges
solutions
assembling
high‐performance
lean‐electrolyte
Li–S
First,
arising
from
conditions
discussed
detail.
Then,
approaches
recent
progress
to
reduce
usage,
including
optimization
electrode
porosity
ion
conduction,
introduction
electrocatalysis,
exploration
new
active
materials,
regulation,
Li
metal
protection
reviewed.
Finally,
future
research
directions
proposed.
Abstract
Lithium–sulfur
batteries
are
recognized
as
the
next
generation
of
high‐specific
energy
secondary
owing
to
their
satisfactory
theoretical
specific
capacity
and
density.
However,
commercial
application
is
greatly
limited
by
a
series
problems,
including
disordered
migration
behavior,
sluggish
redox
kinetics,
serious
shuttle
effect
lithium
polysulfides.
One
most
efficient
approaches
physically
limit
rational
design
hollow
framework
sulfur
host.
influence
structure
on
interlayers
has
not
been
clearly
reported.
In
this
study,
Mo
2
C/C
catalysts
with
hollow(H‐Mo
C/C)
solid(S‐Mo
frameworks
rationally
designed
explore
dependence
interlayer
or
contrast
physical
limitations
host,
inhibited
lithium‐ion
diffusion,
resulting
in
poor
electrochemical
properties
at
high
current
densities.
Based
superiority
various
frameworks,
H‐Mo
C/C@S
|
S‐Mo
C/C@PP
Li
cells
assembled
displayed
excellent
performance.
This
work
re‐examines
requirements
principles
catalyst
different
battery
units.
Chemical Reviews,
Год журнала:
2024,
Номер
124(20), С. 11348 - 11434
Опубликована: Окт. 9, 2024
Environmental
catalysis
has
emerged
as
a
scientific
frontier
in
mitigating
water
pollution
and
advancing
circular
chemistry
reaction
microenvironment
significantly
influences
the
catalytic
performance
efficiency.
This
review
delves
into
engineering
within
liquid-phase
environmental
catalysis,
categorizing
microenvironments
four
scales:
atom/molecule-level
modulation,
nano/microscale-confined
structures,
interface
surface
regulation,
external
field
effects.
Each
category
is
analyzed
for
its
unique
characteristics
merits,
emphasizing
potential
to
enhance
efficiency
selectivity.
Following
this
overview,
we
introduced
recent
advancements
advanced
material
system
design
promote
(e.g.,
purification,
transformation
value-added
products,
green
synthesis),
leveraging
state-of-the-art
technologies.
These
discussions
showcase
was
applied
different
reactions
fine-tune
regimes
improve
from
both
thermodynamics
kinetics
perspectives.
Lastly,
discussed
challenges
future
directions
engineering.
underscores
of
intelligent
materials
drive
development
more
effective
sustainable
solutions
decontamination.
Journal of Colloid and Interface Science,
Год журнала:
2024,
Номер
665, С. 286 - 298
Опубликована: Март 20, 2024
Tailoring
porous
host
materials,
as
an
effective
strategy
for
storing
sulfur
and
restraining
the
shuttling
of
soluble
polysulfides
in
electrolyte,
is
crucial
design
high-performance
lithium-sulfur
(Li-S)
batteries.
However,
widely
studied
conductive
hosts
such
mesoporous
carbon,
how
aspect
ratio
affects
confining
ability
to
polysulfides,
ion
diffusion
well
performances
Li-S
batteries
has
been
rarely
studied.
Herein,
ordered
carbon
(OMC)
chosen
a
proof-of-concept
prototype
host,
its
tuned
from
over
∼
2
down
below
1.2
by
using
silica
hard
templates
with
variable
length/width
scales.
The
correlation
between
OMCs
electrochemical
corresponding
sulfur-carbon
cathodes
are
systematically
combined
measurements
microscopic
characterizations.
Moreover,
evolution
species
at
different
discharge
states
scrutinized
small-angle
X-ray
scattering.
This
study
gives
insight
into
effects
on
battery
cathodes,
providing
guidelines
designing
materials
high-energy
cathodes.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 29, 2024
Abstract
The
introduction
of
an
electrocatalyst
to
accelerate
the
kinetics
lithium
polysulfides
(LiPSs)
reduction/oxidation
is
beneficial
enhance
capacity
sulfur
cathode
and
inhibit
shuttling
effect
LiPSs.
However,
current
electrocatalysts
mainly
focus
on
metal‐based
active
sites
reduce
reaction
barriers,
there
remains
a
great
challenge
in
developing
light‐weighted
metal‐free
catalysts.
In
this
work,
1D
graphitic
carbon
nitride
nanorods
(g‐C
3
N
4
‐NRs)
with
carboxyl
(─COOH)
acylamide
(─CONH
2
)
functional
groups
are
designed
as
for
lithium‐sulfur
batteries
transport
Li
+
conversion
density
theory
(DFT)
calculations
prove
that
existence
─COOH
group
realizes
adsorption
LiPSs
accelerates
,
while
─CONH
energy
barrier
S
8
S.
addition,
situ
UV–vis
nucleation/dissociation
experiments
also
verify
g‐C
‐NRs
achieve
rapid
transformation
under
synergistic
action
groups.
Consequently,
based
‐NRs‐PP
separator
at
specific
700.3
mAh
g
−1
after
70
cycles
0.2
C,
0
°C.
This
work
provides
new
strategy
breaking
through
bottleneck
catalysts
high‐performance
batteries.
