Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 28, 2024
Abstract
Potassium‐ion
batteries
(PIBs)
using
carbonaceous
anode
materials
have
attracted
a
great
deal
of
research
interest.
However,
the
large
atomic
size
potassium
ions
inevitably
leads
to
huge
volume
expansion
and
collapse
anodes
during
intercalation,
which
greatly
hinders
rate
performance
cycling
life.
In
this
work,
carbon
nanotube‐derived
porous
N‐doped
nanoribbon
(CNR)
bundles
are
designed
as
an
for
PIBs.
These
CNR
in
rich
defects
provide
fast
channels
charge
transport
abundant
active
sites
ion
storage.
The
exhibit
maximum
capacity
441.4
mA
h
g
−1
at
current
density
0.2
A
after
200
cycles
well
highly
reversible
263.6
5.0
even
1000
cycles.
This
work
provides
guidance
structure
design
high‐performance
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 30, 2024
Abstract
To
surpass
the
energy
density
limit
of
current
Li–S
batteries,
attaining
a
long
lifespan
under
lean‐electrolyte
conditions
is
imperative.
The
persistent
challenge
involves
suppressing
electrolyte
decomposition
while
facilitating
sulfur
electrode
reaction.
In
this
study,
solvating
power
1dimethoxy
ethane
fine‐tuned,
main
solvent,
using
fluorinated
ether
cosolvents
via
H–F
interactions.
As
fluorination
degree
cosolvent
increases,
coordination
anions
around
Li‐ion
and
solubilities
Li
polysulfides
decrease.
By
systematically
varying
power,
moderately
electrolytes
are
prepared
that
can
effectively
suppress
dissolution
without
hindering
redox
kinetics.
induce
uniform
deposition
reduce
owing
to
formation
anion‐derived
solid
interphase.
An
assembled
pouch‐type
battery
containing
an
with
optimized
solvation
delivers
405
Wh
kg
−1
at
E/S
ratio
2.0
µL
mg
s
over
80
cycles.
This
study
suggests
strategy
finely
tune
+
structure
for
achieving
well‐balanced
performances
cathodes
Li‐metal
anodes
conditions.
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 28, 2024
Abstract
Potassium‐ion
batteries
(PIBs)
using
carbonaceous
anode
materials
have
attracted
a
great
deal
of
research
interest.
However,
the
large
atomic
size
potassium
ions
inevitably
leads
to
huge
volume
expansion
and
collapse
anodes
during
intercalation,
which
greatly
hinders
rate
performance
cycling
life.
In
this
work,
carbon
nanotube‐derived
porous
N‐doped
nanoribbon
(CNR)
bundles
are
designed
as
an
for
PIBs.
These
CNR
in
rich
defects
provide
fast
channels
charge
transport
abundant
active
sites
ion
storage.
The
exhibit
maximum
capacity
441.4
mA
h
g
−1
at
current
density
0.2
A
after
200
cycles
well
highly
reversible
263.6
5.0
even
1000
cycles.
This
work
provides
guidance
structure
design
high‐performance
