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
ACS Energy Letters,
Journal Year:
2025,
Volume and Issue:
unknown, P. 750 - 778
Published: Jan. 13, 2025
Fast-charging
technology,
which
reduces
charging
time
and
enhances
convenience,
is
attracting
attention.
Sodium-ion
batteries
(SIBs)
potassium-ion
(PIBs)
are
emerging
as
viable
alternatives
to
lithium-ion
(LIBs)
due
their
abundant
resources
low
cost.
However,
during
fast
discharging,
the
crystal
structures
of
cathode
materials
in
SIBs/PIBs
can
be
damaged,
negatively
impacting
performance,
lifespan,
capacity.
To
address
this,
there
a
need
explore
electrode
with
ultrahigh
rate
capabilities.
Prussian
Blue
its
analogues
(PB
PBAs)
have
shown
great
potential
for
both
SIBs
PIBs
unique
excellent
electrochemical
properties.
This
Review
examines
use
PBAs
PIBs,
focusing
on
fast-charging
(rate)
performance
commercialization
potential.
Through
systematic
analysis
discussion,
we
hope
provide
practical
guidance
developing
contributing
advancement
widespread
adoption
green
energy
technologies.
Journal of Materials Chemistry A,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
This
study
develops
a
self-assembled,
hydrophobic,
and
compact
C
32
H
67
O
4
P
layer
on
O3-NaNi
0.33
Fe
Mn
2
cathode,
effectively
shielding
the
electrode
from
air
degradation
metal
dissolution,
thereby
enhancing
sodium-ion
battery
performance.
Advanced Energy Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 19, 2025
Abstract
Heterostructure
engineering
and
active
component
reconstruction
are
effective
strategies
for
efficient
rapid
charge
storage
in
advanced
sodium‐ion
batteries
(SIBs).
Herein,
sandwich‐type
CoSe
2
@MXene
composites
used
as
a
model
to
reconstruct
new
Cu
Se@MXene
heterostructures
by
situ
electrochemical
driving.
The
MXene
core
provides
interconnected
pathways
electron
ion
conduction,
while
also
buffering
volumetric
expansion
stabilize
the
structure.
This
reconstructed
heterointerface
features
abundant
sodium
sites,
enhanced
Na
+
adsorption,
diffusion
kinetics,
thus
increasing
capacity.
Moreover,
elevated
Co
valence
state
during
discharge
process
allows
it
act
an
reservoir
provide
additional
supply
Se
conversion
accelerate
kinetics.
When
employed
anode
SIBs,
electrode
exhibits
high
capacity
(694
mAh
g
−1
at
0.1
A
),
excellent
rate
performance
(425
20
exceptional
durability
(437
after
10
000
cycles
5
with
0.0014%
decay
per
cycle).
mechanism
of
is
further
revealed
through
ex
characterization
theoretical
calculations.
work
approach
designing
conversion‐type
anodes
SIBs.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 22, 2025
Abstract
Potassium‐ion
batteries
(PIBs),
with
abundant
resources
and
low
cost,
are
considered
as
a
promising
alternative
to
commercial
lithium‐ion
for
low‐cost
large‐scale
applications.
Over
the
past
decade,
significant
academic
progresses
made
in
development
of
PIBs,
including
advancements
cathodes,
anodes,
electrolytes.
However,
most
improvements
achieved
under
laboratory
conditions
(e.g.,
K
metal‐based
half‐cells
mass
loading
active
materials),
performance
PIBs
full
cells
is
still
far
from
requirements
A
critical
insight
bridging
research
commercialization
urgently
needed
guide
future
this
field.
This
review
will
discuss
challenges
improvement
strategies
focusing
on
potential
practical
electrolytes,
well
their
cells.
It
aims
give
readers
clear
logical
understanding
PIBs.
The
application
analysis
also
discussed
provide
comprehensive
Finally,
perspectives
provided
The Journal of Physical Chemistry B,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 7, 2025
We
report
a
computational
protocol
for
simulating
electric
field
gradient
dynamics
around
Na+
cations
in
mixtures
of
1-ethyl-3-methylimidazolium
tetrafluoroborate
([Im21][BF4])
and
water
validated
by
comparison
to
measurements
nuclear
magnetic
resonance
(NMR)
T1
relaxation
times.
Our
combines
classical
molecular
simulations
scaled
charge
model
[Im21][BF4]
TIP4Pew
generate
the
(EFG)
correlation
function,
CEFG(t),
with
quantum
chemical
calculations
determining
EFG
variance
⟨Vzz2⟩.
Although
we
demonstrate
that
Sternheimer
approximation
is
as
valid
these
it
neat
water,
do
not
recommend
using
underestimates
⟨Vzz2⟩
∼10%
compared
set
computationally
efficient
density
functional
theory
calculations.
capable
reproducing
both
composition-
temperature-dependence
over
full
range
experimentally
accessible
[Im21][BF4]/water
compositions
temperature
285-350
K.
also
show
scaling
charges
does
simply
speed
up
solvent,
but
has
effects
on
shape
CEFG(t).
Following
validation
our
protocol,
analyze
times
CEFG(t)
mechanism
changes
different
when
composition
mixture
varies
temperature.
As
changes,
balance
between
inertial
diffusive
alters,
whereas
only
affects
time
scale
diffusion
portion
relaxation.
solvation
shell
significantly
more
labile
than
BF4-
anions
compete
be
shell.
This
opens
door
detailed
interpretation
NMR
experiments
monatomic
ions
complex
liquid
environments.
