Chemistry - A European Journal,
Journal Year:
2024,
Volume and Issue:
30(13)
Published: Jan. 2, 2024
Abstract
Li‐S
batteries
possess
high
energy
density
and
have
been
one
of
the
most
promising
storage
systems.
For
sulfur
cathodes,
electrochemical
performance
is
still
seriously
hindered
by
polysulfide
shuttling
sluggish
conversion
kinetics.
It
has
demonstrated
to
be
effective
strategy
address
above
issues
via
designing
electrocatalysts
with
robust
affinity
catalytic
capacity
towards
polysulfides.
However,
it
a
great
challenge
rapidly
economically
discover
high‐performance
electrocatalysts.
Herein,
using
functional
theory
calculation,
we
studied
chemisorption‐catalysis
behavior
species
on
series
(MCo
2
X
4
,
M=Co,
Zn,
Cu,
Ni,
Fe,
Mn,
X=O,
S,
Se)
assess
effect
anions
cations
co‐regulation
their
electronic
structure,
chemisorption
behavior,
property.
FeCo
Se
CuCo
combined
appropriate
superior
conductivity
reduction
predicted
as
novel
for
batteries.
This
study
gives
theoretical
guidance
rapid
discovery
high‐efficient
electrocatalyst
boost
cathodes.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: April 15, 2024
Abstract
Engineering
atom-scale
sites
are
crucial
to
the
mitigation
of
polysulfide
shuttle,
promotion
sulfur
redox,
and
regulation
lithium
deposition
in
lithium–sulfur
batteries.
Herein,
a
homonuclear
copper
dual-atom
catalyst
with
proximal
distance
3.5
Å
is
developed
for
batteries,
wherein
two
adjacent
atoms
linked
by
pair
symmetrical
chlorine
bridge
bonds.
Benefiting
from
their
unique
coordination,
increased
active
interface
concentration
synchronously
guide
evolutions
species.
Such
delicate
design
breaks
through
activity
limitation
mononuclear
metal
center
represents
concept
battery
realm.
Therefore,
remarkable
areal
capacity
7.8
mA
h
cm
−2
achieved
under
scenario
content
60
wt.
%,
mass
loading
7.7
mg
electrolyte
dosage
4.8
μL
−1
.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(25)
Published: Jan. 15, 2024
Abstract
Chalcogenide
cathodes
with
multi‐electron
transfer
characteristics
are
indispensable
to
aluminum‐ion
batteries
(AIBs).
Nevertheless,
their
grievous
capacity
degradation
and
sluggish
reaction
kinetics
remain
fundamental
challenges
for
the
practical
application.
Herein,
a
Cu
2
S/Ni
3
S
multiphase
structure
within
metal‐organic
frame
(MOF)
derived
carbon
decoration
layer
(CNS@MC)
is
constructed
elevate
intrinsic
electronic
properties
of
chalcogenide
cathode
realize
high‐performance
AIBs.
The
existence
outer
strong
orbital
interaction
at
inner
heterointerfaces
eliminates
bandgap
arises
more
electrons
Fermi
level,
efficiently
reducing
energy
barrier
electron
achieving
high
reactivity
cathodes.
CNS@MC
also
presents
active
solvent
groups,
which
beneficial
capture
Al
3+
facilitate
three‐electron
charge‐storage
reactions.
Experimental
results
demonstrate
that
tailored
possesses
superior
redox
due
sufficient
surface
area
rapid
Al‐ion
diffusion
during
cycling.
Meanwhile,
robust
delivers
ultra‐high
electrochemical
stability
(131.1
mAh
g
−1
over
3500
cycles)
coulombic
efficiency
outstanding
rate
performance.
This
work
offers
new
opportunities
optimizing
electrodes
based
on
MOF
derivatives
heterostructure,
providing
novel
thoughts
designing
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(14), P. 17493 - 17505
Published: April 2, 2024
The
long-term
stability
of
Li–S
batteries
is
significantly
compromised
by
the
shuttle
effect
and
insulating
nature
active
substance
S,
constraining
their
commercialization.
Developing
efficient
catalysts
to
mitigate
lithium
polysulfides
(LiPSs)
still
a
challenge.
Herein,
we
designed
synthesized
rose-like
cobalt–nickel
bimetallic
oxide
catalyst
NiCo2O4–OV
enriched
with
oxygen
vacancies
(OV)
verified
controllable
synthesis
different
contents
OV.
Introducing
OV
proved
be
an
approach
for
controlling
electronic
structure
electrocatalyst
managing
absorption/desorption
processes
on
reactant
surface,
thereby
addressing
challenges
posed
LiPS
sluggish
transformation
kinetics
in
batteries.
In
addition,
investigated
NiCo2O4
adsorption
capacity
LiPSs
using
experiments
density
functional
theory
(DFT)
simulations.
With
increase
level
OV,
binding
energy
between
two
enhanced,
more
obvious.
contributes
decomposition
Li2S
diffusion
Li+
batteries,
which
promotes
kinetic
process
