With
the
increasing
demand
for
high-performance
energy
storage
devices,
potassium-ion
batteries
(PIBs)
have
attracted
significant
interest
due
to
their
large
capacity,
affordability,
and
high
density.
However,
radius
of
potassium
ions
necessitates
strong
structural
stability
in
anode
material
sustain
long-term
cycling.
In
this
work,
a
self-templated
nitrogen/sulfur
co-doping
carbon
was
designed
synthesized
using
thiourea
as
both
doping
source
template.
This
approach
facilitated
incorporation
nitrogen
sulfur
heteroatoms
while
creating
highly
ordered
structure
during
carbonization
process.
The
experimental
results
demonstrated
that
additional
S
not
only
elevated
N
level
provide
more
K-storage
sites,
which
improved
specific
but
also
increased
stacking
order
improve
PIBs.
N/S
encouraged
formation
high-ionic
conductivity
SEI
film
fast
interfacial
kinetics.
prepared
its
great
potential
an
PIBs
by
delivering
capacities
327
mAh
g–1
at
50
mA
maintaining
excellent
cycling
stability,
achieved
179
after
long
2000
cycles
current
density
1000
g–1.
study
provided
some
good
ideas
methods
development
materials
Coal-based
carbons
have
garnered
interest
as
cost-effective
anodes
for
sodium-ion
batteries
(SIBs)
owing
to
their
widespread
availability
and
economic
practicality.
However,
the
inherent
limitations
in
microstructure,
including
insufficient
active
sites
Na-ion
storage,
restrict
potential
high-performance
applications.
Herein,
a
pitch-assisted
coating
treatment
through
confined
carbonization
is
employed
transform
open
micropores
coal-based
activated
carbon
into
closed
pores,
resulting
more
compact
efficient
storage.
Complementary
ex
situ
Raman
X-ray
photoelectron
spectroscopy
analyses
elucidate
that
Na
filling
within
pores
significantly
influences
low-voltage
plateau
capacity,
validating
critical
role
of
enhancing
sodium
storage
efficiency.
The
engineered
demonstrate
capacity
290.0
mAh
g-1
an
initial
coulombic
efficiency
78.0%,
along
with
exceptional
cycling
stability
rate
performance.
In
combination
O3-NaNi1/3Fe1/3Mn1/3O2
cathode,
assembled
full
cell
achieves
remarkable
energy
density
251.2
Wh
kg-1,
determined
by
using
total
mass
cathode
anode.
This
work
provides
novel
perspectives
on
structural
engineering
materials,
establishing
foundation
commercialization
SIBs.
EES batteries.,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
The
low
desolvation
energy,
strong
adsorption
energy
and
insertion
of
alkali
metal
cations
in
seawater
reduce
the
activation
barriers
facilitate
interface
reaction
kinetics,
endowing
high-performance
zinc-ion
batteries.
