ACS Applied Nano Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 16, 2024
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
Molecules,
Год журнала:
2025,
Номер
30(5), С. 1100 - 1100
Опубликована: Фев. 27, 2025
Sodium-ion
batteries
(SIBs)
are
a
promising
electrochemical
energy
storage
system
but
face
great
challenges
in
developing
fast-charging
anodes.
MXene-based
composites
new
class
of
two-dimensional
materials
that
expected
to
be
widely
used
SIB
due
their
excellent
electrical
conductivity
and
stable
structure.
However,
MXenes
tend
experience
interlayer
stacking
during
preparation,
which
can
result
poor
performance
lower
actual
capacity
compared
the
theoretical
value.
In
this
study,
porous
structure
was
created
using
chemical
oxidation
method
from
microscopic
perspective.
The
MXene
(referred
as
PM)
prepared
by
low
concentration
hydrogen
peroxide
pore-forming
solution,
enlarged
spacing
facilitate
transport
sodium
ions
electrolyte
solution.
PM
with
addition
solution
achieved
high-rate
performance,
247
mAh
g-1
at
0.1
A
114
10
g-1.
It
also
demonstrated
long-cycle
stability,
117
maintained
over
1000
cycles
5
