Advanced Functional Materials,
Год журнала:
2024,
Номер
34(27)
Опубликована: Фев. 21, 2024
Abstract
Silicon
oxide
(SiO
x
)
material
is
gradually
developing
as
a
promising
alternative
to
silicon
due
better
trade‐off
in
terms
of
volume
expansion
and
theoretical
capacity.
However,
the
low
conductivity
instability
electrode–electrolyte
interface
caused
by
penetration
fluorine
anion
(F
−
severely
affect
stability
solid
electrolyte
interphase
(SEI),
ultimately
leading
capacity
loss
cycling
instability.
In
this
work,
an
“ionic
fence”
idea
proposed,
which
effectively
inhibits
shuttle
F
promotes
SEI.
Based
on
this,
dense
orderly
silicon‐based
interconnected
assembly
covered
TiN
protective
ionic
fence
designed
using
melt‐assembly
technique
nitridation
strategy.
After
1000
deep
cycles,
can
be
maintained
at
431.7
mA
h
g
−1
,
average
Coulombic
efficiency
reach
99.69%
throughout
process,
even
steady
state
after
2000
showing
excellent
electrochemical
stability.
Finite
element
analysis
reveals
that
fence,
stress
management
layer,
constrains
materials
improves
mechanical
structural
particles
fully
lithiated
state,
thus
ensuring
long‐term
Selective
design
for
has
great
universality
development
potential
building
stable
electrode
materials.
Abstract
Investigations
into
lithium–sulfur
batteries
(LSBs)
has
focused
primarily
on
the
initial
conversion
of
lithium
polysulfides
(LiPSs)
to
Li
2
S
.
However,
subsequent
solid–solid
reaction
from
and
decomposition
process
should
be
equally
prioritized.
Creating
a
virtuous
cycle
by
balancing
all
three
chemical
processes
is
crucial
for
realizing
practical
LSBs.
Herein,
amorphous
Ni
3
B
in
synergy
with
carbon
nanotubes
(aNi
B@CNTs)
proposed
implement
consecutive
catalysis
8(solid)
→
LiPSs
(liquid)
(solid)
→LiPSs
Systematic
theoretical
simulations
experimental
analyses
reveal
that
aNi
B@CNTs
an
isotropic
structure
abundant
active
sites
can
ensure
rapid
adsorption‐catalysis
as
well
uniform
precipitation.
The
deposition
enables
instant/complete
oxidation
LiPSs.
produced
are
again
rapidly
uniformly
adsorbed
next
sulfur
evolution
process,
thus
creating
species
conversion.
Accordingly,
B@CNTs‐based
cell
presents
remarkable
rate
capability,
long‐term
life,
superior
cyclic
stability,
even
under
high
loading
extreme
temperature
environments.
This
study
proposes
significance
realize
Advanced Energy Materials,
Год журнала:
2023,
Номер
13(20)
Опубликована: Апрель 5, 2023
Abstract
Metal‐chalcogen
batteries
(MCBs)
have
been
considered
promising
candidates
for
next‐generation
energy
storage
because
of
their
low
cost,
high
theoretical
capacity,
and
environmental
friendliness.
However,
several
issues,
such
as
volume
changes
during
charging/discharging,
the
shuttle
effect
soluble
intermediates,
sluggish
reaction
kinetics
intermediate
conversions,
uncontrolled
dendrite
growth
alkali
metal
anodes,
greatly
impeded
commercialization
MCBs.
The
introduction
metal‐organic
framework
(MOF)‐based
materials
(pristine
MOFs,
MOF
composites,
derivatives)
into
different
parts
MCBs
can
effectively
overcome
above
issues
these
possess
advantages
porosity,
density,
large
surface
area,
regular
pore
channels,
tunable
size,
topological
variety.
Herein,
a
detailed
overview
recent
advances
in
MOF‐based
MCBs,
providing
comprehensive
guidelines
further
research
is
presented.
cathodes
anodes
are
first
summarized,
which
influence
various
parameters
pristine
MOFs
on
properties
application
status
typical
composites
derivatives
separators
then
presented
according
to
working
mechanisms.
Next,
electrolytes
described
based
physical
states.
Finally,
challenges
outlook
applying
discussed.
Angewandte Chemie,
Год журнала:
2023,
Номер
135(41)
Опубликована: Авг. 21, 2023
Abstract
The
limited
active
sites
and
poor
acid‐alkaline
solution
stability
of
metal–organic
frameworks
(MOFs),
significantly
limit
their
wider
application.
In
this
study,
the
acid
property
tannic
(TA)
was
used
as
an
etchant
to
etch
surface‐active
sites.
Subsequently,
further
chelation
protonated
TA
with
exposed
metal
site
can
effectively
protect
ions.
Meanwhile,
provided
a
large
amount
phenolic
hydroxyl
groups,
which
greatly
improve
imidazolate‐coordinated
MOFs.
electrochemical
test
results
indicated
that
MOFs
composite
materials
synthesized
using
scheme
had
high
specific
capacitance
stability.
And
mechanism
its
reaction
process
explored
through
in
situ
X‐ray
diffraction
(XRD)
theoretical
calculations.
addition,
same
treatment
carried
out
series
carboxyl‐coordinated
MOFs,
confirmed
principle
obtain
higher
This
paper
explains
functionalization
nano‐MOFs
by
polyphenolic
compounds,
providing
new
ideas
for
research
nano‐MOFs.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(27)
Опубликована: Фев. 21, 2024
Abstract
Silicon
oxide
(SiO
x
)
material
is
gradually
developing
as
a
promising
alternative
to
silicon
due
better
trade‐off
in
terms
of
volume
expansion
and
theoretical
capacity.
However,
the
low
conductivity
instability
electrode–electrolyte
interface
caused
by
penetration
fluorine
anion
(F
−
severely
affect
stability
solid
electrolyte
interphase
(SEI),
ultimately
leading
capacity
loss
cycling
instability.
In
this
work,
an
“ionic
fence”
idea
proposed,
which
effectively
inhibits
shuttle
F
promotes
SEI.
Based
on
this,
dense
orderly
silicon‐based
interconnected
assembly
covered
TiN
protective
ionic
fence
designed
using
melt‐assembly
technique
nitridation
strategy.
After
1000
deep
cycles,
can
be
maintained
at
431.7
mA
h
g
−1
,
average
Coulombic
efficiency
reach
99.69%
throughout
process,
even
steady
state
after
2000
showing
excellent
electrochemical
stability.
Finite
element
analysis
reveals
that
fence,
stress
management
layer,
constrains
materials
improves
mechanical
structural
particles
fully
lithiated
state,
thus
ensuring
long‐term
Selective
design
for
has
great
universality
development
potential
building
stable
electrode
materials.
