Energy & Environmental Science,
Journal Year:
2024,
Volume and Issue:
17(18), P. 6571 - 6581
Published: Jan. 1, 2024
A
tailored
Wadsley–Roth
crystallographic
shear
structure
containing
inspiring
domains
with
tetrahedron,
tetrahedron-free
and
large-size
blocks
in
the
lattice
of
novel
titanium
niobium
tungsten
oxide
for
high-power
lithium-ion
batteries.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 6, 2024
Abstract
Transition
metal
sulfides
as
anode
materials
for
sodium‐ion
batteries
(SIBs)
have
the
advantage
of
high
capacity.
However,
their
cycle‐life
and
rate
performance
at
ultra‐high
current
density
is
still
a
thorny
issue
that
limit
applicability
these
materials.
In
this
paper,
carbon‐embedded
heterojunction
with
sulfur‐vacancies
regulated
by
ultrafine
bimetallic
(vacancy‐CoS
2
/FeS
@C)
robust
interfacial
C‐S‐Co/Fe
chemical
bonds
successfully
synthesized
explored
an
material
battery.
By
changing
ratio
two
cations,
concentration
anion
sulfur
vacancies
can
be
in‐situ
adjusted
without
additional
post‐treatment.
The
as‐prepared
vacancy‐CoS
@C
offers
ultrahigh
(285.1
mAh
g
−1
200
A
),
excellent
long‐cycle
stability
(389.2
40
after
10000
cycles),
outperforming
all
reported
transition
sulfides‐based
SIBs.
Both
ex‐situ
characterizations
provide
strong
evidence
evolution
mechanism
phases
stable
solid‐electrolyte
interface
(SEI)
on
surface.
functional
theory
calculations
show
constructing
reasonable
significantly
increase
electronic
conductivity.
Notably,
assembled
@C//Na
3
V
(PO
4
)
/C
full‐cell
shows
capacity
226.2
400
cycles
2.0
,
confirming
material's
practicability.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(31), P. 21320 - 21334
Published: July 26, 2024
The
high-entropy
silicon
anodes
are
attractive
for
enhancing
electronic
and
Li-ionic
conductivity
while
mitigating
volume
effects
advanced
Li-ion
batteries
(LIBs),
but
plagued
by
the
complicated
elements
screening
process.
Inspired
resemblances
in
structure
between
sphalerite
diamond,
we
have
selected
sphalerite-structured
SiP
with
metallic
as
parent
phase
exploring
element
of
silicon-based
anodes.
inclusion
Zn
is
crucial
improving
structural
stability
Li-storage
capacity.
Within
same
group,
performance
significantly
improved
increasing
atomic
number
order
BZnSiP3
<
AlZnSiP3
GaZnSiP3
InZnSiP3.
Thus,
InZnSiP3-based
electrodes
achieved
a
high
capacity
719
mA
h
g–1
even
after
1,500
cycles
at
2,000
g–1,
high-rate
725
10,000
owing
to
its
superior
lithium-ion
affinity,
faster
conduction
diffusion,
higher
reversibility,
mechanical
integrity
than
others.
Additionally,
incorporation
larger
sizes
leads
greater
lattice
distortion
more
defects,
further
facilitating
mass
charge
transport.
Following
these
rules,
disordered-cation
compounds
such
GaCuSnInZnSiP6,
GaCu(or
Sn)InZnSiP5,
CuSnInZnSiP5,
well
mixed-cation
-anion
compositions,
InZnSiPSeTe
InZnSiP2Se(or
Te),
synthesized,
demonstrating
conductivity.
formation
mechanism
attributed
negative
energies
arising
from
elevated
entropy.
Achieving
high
energy
density
and
long
cycle
life
in
alloy-type
anodes
remains
a
significant
challenge
due
to
the
large
volume
changes
during
cycling.
Here,
we
introduce
high-entropy
engineering
approach
using
SnSb-based
oxides
codoped
with
Ti
Al
(SSBTA-600),
designed
promote
formation
of
efficient
oxygen
vacancies
at
calcination
temperature
600
°C.
This
results
remarkable
performance
capacity
1012
mAh
g-1
0.5
A
297
5
after
500
cycles,
superior
retention
99%
83.5%,
respectively.
LiFePO4||SSBTA
full
cell
achieves
134
100
cycles
89.4%
retention,
demonstrating
its
practical
potential
for
lithium-ion
batteries.
The
concentration
SSBTA-600,
induced
by
multivalency
Al,
is
validated
electron
paramagnetic
resonance
(EPR)
X-ray
absorption
spectroscopy
(XAS).
significantly
improves
cyclic
stability
high-rate
provides
promising
strategy
enhancing
anodes.
Energy & Environmental Science,
Journal Year:
2024,
Volume and Issue:
17(18), P. 6533 - 6547
Published: Jan. 1, 2024
High-entropy
sphalerite-structured
compounds,
derived
from
cubic
GeP,
demonstrate
remarkable
metallic
conductivity
and
superior
lithium-storage
capabilities
when
compared
to
the
parent
phases
of
monoclinic
layered
GeP
or
SiP.
