Benefiting
from
the
abundant
sodium
resources,
sodium-ion
batteries
(SIBs)
have
attracted
interest
in
last
decade,
which
hold
great
practical
prospects
for
future
large-scale
energy
storage
applications.
Nowadays,
sluggish
reaction
kinetics
are
main
obstacle
to
development
of
high-performance
SIBs.
Herein,
nitrogen-doped
amorphous
carbon-coated
MoSe2
(MoSe2@NC)
nanosheets
developed
by
a
facile
hydrothermal
with
subsequent
calcination
strategy.
The
expanded
(002)
crystalline
planes
facilitate
insertion/extraction
Na+.
coated
carbon
layers
effectively
enhance
electric
conductivity
and
restrict
agglomeration
MoSe2.
Mo-C
bonding
formed
interfacial
coupling
between
carbons
facilitates
charge
transfer
MoSe2@NC.
As
result,
MoSe2@NC
anode
exhibits
reversible
discharge
capacity
427.6
mAh
g-1
at
0.1
A
high
cyclic
stability
337.9
after
200
cycles
0.5
g-1.
Advanced Powder Materials,
Год журнала:
2023,
Номер
3(2), С. 100169 - 100169
Опубликована: Дек. 2, 2023
Layered
transition
metal
dichalcogenides
are
promising
candidates
for
sodium
storage
but
suffering
from
low
intrinsic
electronic
conductivity
and
limited
interlayer
spacing
fast
electron/ion
transport,
which
restricts
their
high-rate
capability
cycling
stability.
In
this
work,
rGO@MoSe2/NAC
hierarchical
architectures,
consisting
of
conductive
reduced
graphene
oxide
(rGO)
supported
by
hollow
nanospheres
that
rolled
superlattices
alternatively
overlapped
MoSe2
N-doped
amorphous
carbon
(NAC)
monolayers,
synthesized
as
a
high-performance
anode.
Theoretical
calculations
reveal
the
intercalation
NAC
monolayer
between
two
adjacent
monolayers
improving
in
both
surface
internal
bulk
to
fully
accelerate
electron
transport
enhance
Na
+
adsorption.
The
interoverlapped
MoSe2/NAC
superlattice
featuring
wide
expansion
(72.3
%)
dramatically
decreases
diffusion
barriers
insertion/extraction.
Moreover,
rGO
network
contribute
robust
hiberarchy
can
well
release
stress
buffer
volume
expansion,
thereby
enabling
outstanding
structural
Consequently,
anode
exhibits
excellent
194
mAh
g−1
ultralong
cyclability
12
000
cycles
with
capacity
fading
rate
0.0038
%
per
cycle
at
an
ultra-high
current
50
A
g−1,
delivering
best
performance
date.
Remarkably,
Na3V2(PO4)3‖rGO@MoSe2/NAC
full
cells
also
present
stability
(600
cycles)
10C
rate,
proves
great
potential
fast-charging
applications.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 19, 2025
Abstract
Accelerating
the
Na
+
diffusion
kinetics
and
enhancing
structural
stability
in
sulfide‐based
anodes
by
engineering
is
an
extremely
effective
strategy
for
improving
sodium
storage
performance.
Herein,
optimized
Co
9
S
8
/MoS
2
heterojunction
with
preferred
crystal
orientation
delicately
designed
successfully
fabricated.
Distinguish
from
conventional
heterostructure
anisotropic
distribution,
isotropic
structure
can
provide
a
rapid
‐diffusion
pathway
regulate
‐concentration
to
promote
its
uniform
distribution.
Furthermore,
it
simultaneously
realizes
even
dispersion
of
inner
stress
acquire
during
discharge/charge
processes.
Additionally,
abundant
heterointerfaces
one
direction
effectively
improve
charge
transfer
reduce
distance,
ensuring
boosted
reaction
kinetic.
As
expected,
ascribing
synergetic
effect,
presents
excellent
ultra‐high
rate
performance
long‐term
cycling
ion
batteries.
Specifically,
high
capacity
492.1
mAh
g
−1
maintained
over
2000
cycles
at
2.0
A
,
ultrahigh
504
achieved
15.0
.
Moreover,
assembled
NVP@C//Co
full‐cell
achieve
performance,
delivering
318
500
1.0
Inorganic Chemistry Frontiers,
Год журнала:
2024,
Номер
11(7), С. 2017 - 2028
Опубликована: Янв. 1, 2024
MoSe
2
with
a
two-dimensional
layer-like
structure
has
been
considered
promising
anode
material
for
sodium-ion
batteries
(SIBs)
on
account
of
its
high
capacity
and
rich
reserves
Earth.
