Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 21, 2025
Abstract
Rationally
designing
the
electrolyte
system
toward
improving
electrochemical
performance,
especially
rate
capability,
of
sodium
ion
batteries
(SIBs)
is
very
important
for
accelerating
their
large‐scale
commercialization.
Herein,
it
shown
that
by
refining
molar
ratio
two
ether
solvents,
namely
dimethoxyethane
(DME)
and
2‐methyl
tetrahydrofuran
(MeTHF),
a
binary
solvent
forms
solvation
structure
facilitates
high
charge/discharge
hard
carbon
(HC)
electrodes.
It
demonstrated
boosted
capability
can
be
attributed
to
enhanced
transportation
desolvation
kinetics,
resulting
from
participation
weak‐coordinating
MeTHF
molecule
with
low
steric
hindrance
in
sheath,
which
weakens
interaction
between
molecules/anions
through
electron
density
regulation
at
bond
critical
points
(BCPs).
The
thin
uniform
solid
interphase
film
on
HC
electrodes
formed
such
an
ether‐based
also
beneficial
performance
cycling
stability.
results
present
study
shed
more
light
how
engineering
BCPs
sheath
affects
promote
its
practical
application
prospect
future
sodium‐based
battery
chemistries.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 8, 2025
Abstract
Pitch
is
a
highly
preferable
and
cost‐effective
precursor
of
carbon
materials.
Nevertheless,
its
direct
pyrolysis
typically
yields
graphitized
soft
carbon,
posing
challenges
to
the
modulation
closed‐pore
architecture,
due
intense
intermolecular
π–π
interactions.
This
results
in
negligible
plateau
capacity
sluggish
diffusion
kinetics
sodium‐ion
batteries
(SIBs).
In
this
study,
an
innovative
hyper‐crosslinking
strategy
proposed
reconstruct
pitch
molecularly
precisely
tailor
structure
derived
carbon.
The
crosslinker
intertwined
units,
transforming
linear
molecules
into
3D
porous
polymers.
Structurally,
these
cavities
tactfully
reserved
space
for
forming
cores,
with
single‐layer
network
skeleton
ultrathin
pore
walls
upon
carbonization.
enabled
disruption
interactions
and,
therefore,
inhibited
structural
ordering,
facilitating
transition
from
graphitic
highly‐disordered
abundant
closed
pores
featuring
appropriate
sizes
(2
nm)
(1–2
layers).
optimal
sample
delivered
high
370
mAh
g
−1
at
30
mA
,
as
well
rate
capability
that
surpassed
those
most
previously
reported
pitch‐derived
carbons.
Hyper‐crosslinking
has
advanced
development
low‐cost
high‐performance
materials
large‐scale
energy
storage.
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(32), P. 21176 - 21189
Published: Jan. 1, 2024
Through
the
two-step
acid
treatment
and
two-stage
heat
method
proposed
in
this
study,
properties
of
almond
shells
were
efficiently
modulated
transformed
into
hard
carbon
materials
rich
closed
pores
oxygen-containing
groups.
Coatings,
Journal Year:
2025,
Volume and Issue:
15(2), P. 156 - 156
Published: Feb. 1, 2025
Using
biomass-derived
hard
carbon
materials
as
anode
for
sodium-ion
batteries
has
facilitated
resource
recycling
and
brought
significant
economic
benefits.
However,
the
main
obstacles
to
large-scale
application
of
these
are
low
Coulombic
efficiency
high
irreversible
capacity
materials.
This
study
used
waste
moso
bamboo
a
source
prepare
pre-oxidize
through
stepped
temperature
sintering
process.
The
introduction
oxygen
atoms
into
layers
been
shown
increase
spacing
between
layers,
which
facilitates
insertion
sodium-ions
them.
Moreover,
presence
oxygen-containing
groups
increases
number
edge
vacancy
defects
in
skeleton,
thereby
enhancing
actual
material.
Studies
have
indicated
that
different
pre-oxidation
times
varying
impacts
on
electrochemical
properties
discarded
raw
material,
optimal
duration
bamboo-based
was
determined
be
4.5
h
series
comparative
experiments.
A
high-performance
material
prepared
via
stepwise
It
exhibited
specific
301.4
mAh·g−1
at
0.1
C
first-cycle
87%.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 24, 2025
Abstract
The
trade‐off
between
initial
coulombic
efficiency
(ICE)
and
rate
performance
of
hard
carbon
anodes
remains
a
challenge
in
their
practical
applications,
which
is
highly
related
to
complex
active
surface
porous
properties.
In
this
work,
high‐performance
anode
prepared
using
xylose
as
the
source
with
Co
2+
‐assisted
catalysis,
exhibits
an
excellent
91.6%,
high
capacity
396.4
mA
h
g
−1
,
superior
(176.3
at
5
A
),
outstanding
cycling
stability.
Cobalt‐ion
treatment
forms
“expanded”
graphite
segments,
facilitating
intercalation
desolvated
sodium
ions.
Additionally,
intersection
these
segments
creates
“nanocaves”,
enabling
rapid
sodium‐ion
transport
stage.
Using
combination
atomic‐resolution
structural
characterization
three‐dimensional
electron
tomography
via
transmission
microscopy,
it
observed
that
initially
isolated
nanoporous
holes
collapsed
into
interconnected
pancake‐like
pores
during
later
cycling.
reconstructed
narrow
but
connected
pore
structure
provides
abundant
storage
sites
charge
transfer
pathways,
effectively
accommodating
stress
This
work
presents
innovative
strategy
for
designing
commercial
advanced
architectures
also
new
insight
evolution
