Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 17, 2025
The
sluggish
Na
ion
diffusion
kinetics
and
metal
plating
in
hard
carbon
negative
electrodes
restrict
the
fast-charging
of
sodium-ion
batteries,
which
is
intricately
entwined
with
crystal
structure
pore
structure.
Here,
structures
materials
are
focused
on
reveal
that
size
significantly
affects
Na-filling
potentials
during
sodiation
process.
Specifically,
micro
closed
pores
exhibit
higher
potentials,
reduces
risks
at
high
current
densities,
thus
enabling
improved
rate
performance.
As
a
result,
optimized
micropores
(1.6
nm)
achieves
an
initial
capacity
exceeding
400
mAh
g-1
20
mA
plateau
retention
73.3%
density
500
g-1.
Paired
P2-type
layered
oxide
positive
electrodes,
2.2
Ah
pouch
cell
shows
10
min
charging
for
≈90%
after
1500
cycles
6C
rate.
This
work
establishes
bridge
between
performance,
offering
guidance
design
batteries.
Journal of Materials Chemistry A,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
A
hard
carbon
with
concentrated
ultra-micropore
sizes
of
0.4–0.8
nm
is
prepared
by
a
protonation-mediated
strategy,
which
enables
high
plateau
capacity
and
rate
capability
for
sodium-ion
batteries
toward
energy
power
densities.