Batteries,
Journal Year:
2024,
Volume and Issue:
10(10), P. 362 - 362
Published: Oct. 11, 2024
Titanium
dioxide
(TiO2)
has
emerged
as
a
candidate
anode
material
for
sodium-ion
batteries
(SIBs).
However,
their
applications
still
face
challenges
of
poor
rate
performance
and
low
initial
coulomb
efficiency
(ICE),
which
are
induced
by
the
unstable
solid-electrolyte
interface
(SEI)
sluggish
Na+
diffusion
kinetics
in
conventional
ester-based
electrolytes.
Herein,
inspired
electrode/electrolyte
interfacial
chemistry,
tetrahydrofuran
(THF)
is
exploited
to
construct
an
advanced
electrolyte
reveal
relationship
between
improved
electrochemical
derived
SEI
film
on
TiO2
anode.
The
robust
homogeneously
distributed
F-rich
formed
THF
favors
fast
charge
transfer
dynamics
excellent
stability.
As
result,
endows
with
greatly
ICE
(64.5%),
exceptional
capabilities
(186
mAh
g−1
at
5.0
A
g−1),
remarkable
cycling
This
study
elucidates
control
chemistry
rational
design
offers
insights
into
development
high-performance
long-lifetime
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 11, 2025
Abstract
Transition
metal
tellurides
(TMTes)
are
promising
anodes
for
potassium‐ion
batteries
(PIBs)
due
to
their
high
theoretical
specific
capacity
and
impressive
electronic
conductivity.
Nevertheless,
TMTes
suffer
from
persistent
degradation
the
large
volume
expansion,
ion‐diffusion
energy
barriers,
dissolution/shuttle
of
potassium
polytellurides
(K
x
Te
y
).
Herein,
a
heterostructured
CoTe
2
composite
equipped
with
self‐catalytic
center
(N‐CoTe
/LTTC)
is
developed,
exploiting
its
low‐tortuosity
tunneling,
chemical
tunability,
properties
elevate
cycling
stability
new
heights.
Systematic
experiments
have
verified
that
elaborate
N‐CoTe
/LTTC
provides
short‐range
efficient
electron/ion
transport
path,
accelerates
K
+
diffusion
kinetics,
suppresses
huge
distortion.
Notably,
N─Co
bonds
can
promote
adsorption
capabilities
accelerate
conversion
kinetics
under
synergistic
effect
heterojunction.
Consequently,
optimized
electrode
delivers
an
ultralong‑lifespan
cyclability
(over
25
000
cycles
at
2.0
A
g
−1
,
only
0.0019%
decay
rate
per
cycle),
outperforming
those
reported
Te‐based
anodes.
Finally,
/LTTC//PTCDA@450
full
cell
manifests
4300
This
work
uncovers
impact
catalytic
centers
on
valuable
insights
rationally
designing
ultralong‐lifespan
PIBs.
The
development
of
anode
materials
with
a
high
rate
capability
and
cycle
stability
remains
significant
challenge
for
sodium-ion
batteries.
In
this
study,
CNT@(Co,
Fe)Se2
heterojunction
nanocomposite
(HNC)
was
fabricated
by
in
situ
coating
(Co,
onto
the
surface
highly
conductive
CNTs,
forming
heterojunction,
using
convenient
one-step
solid-phase
method.
synergistic
effect
heterostructure
selenium
vacancies
enhances
charge
Na+
ion
conductivity,
while
3D
porous
framework
CNTs
provides
pathway
transfer
diffusion,
resulting
specific
capacity,
excellent
capability,
good
prepared
HNC.
A
reversible
capacity
over
513
mAh
g–1
achieved
after
250
cycles
at
0.1
g–1.
More
than
87.55%
retained
as
current
density
increased
from
to
3
After
1500
5
g–1,
HNC
maintained
272.4
retention
98%
constant
Coulombic
efficiency
100%.
assembled
Na3V2(PO4)3//CNT@(Co,
full-cell
battery
exhibited
anode-specific
420
exceeding
65.5%
50
times.
Advanced Energy Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 19, 2025
Abstract
Heterostructure
engineering
and
active
component
reconstruction
are
effective
strategies
for
efficient
rapid
charge
storage
in
advanced
sodium‐ion
batteries
(SIBs).
Herein,
sandwich‐type
CoSe
2
@MXene
composites
used
as
a
model
to
reconstruct
new
Cu
Se@MXene
heterostructures
by
situ
electrochemical
driving.
The
MXene
core
provides
interconnected
pathways
electron
ion
conduction,
while
also
buffering
volumetric
expansion
stabilize
the
structure.
This
reconstructed
heterointerface
features
abundant
sodium
sites,
enhanced
Na
+
adsorption,
diffusion
kinetics,
thus
increasing
capacity.
Moreover,
elevated
Co
valence
state
during
discharge
process
allows
it
act
an
reservoir
provide
additional
supply
Se
conversion
accelerate
kinetics.
When
employed
anode
SIBs,
electrode
exhibits
high
capacity
(694
mAh
g
−1
at
0.1
A
),
excellent
rate
performance
(425
20
exceptional
durability
(437
after
10
000
cycles
5
with
0.0014%
decay
per
cycle).
mechanism
of
is
further
revealed
through
ex
characterization
theoretical
calculations.
work
approach
designing
conversion‐type
anodes
SIBs.
New Journal of Chemistry,
Journal Year:
2025,
Volume and Issue:
49(8), P. 3218 - 3226
Published: Jan. 1, 2025
In
this
work,
we
construct
a
N-doped
α,β-NiMoO
4
electrode
for
enhancing
the
selective
electrooxidation
of
5-hydroxymethylfurfural
(HMF)
to
2,5-furan
dicarboxylic
acid
(FDCA).
