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
National Science Review,
Journal Year:
2024,
Volume and Issue:
11(11)
Published: Oct. 15, 2024
ABSTRACT
The
poor
oxidation
resistance
of
traditional
electrolytes
has
hampered
the
development
high-voltage
potassium-ion
battery
technology.
Here,
we
present
a
cosolvent
electrolyte
design
strategy
to
overcome
limitations
chemistries.
breaks
dissolution
limitation
salt
through
ion–dipole
interactions,
significantly
enlarging
anion-rich
solvation
clusters,
as
verified
by
insitu
synchrotron-based
wide-angle
X-ray
scattering
experiments.
Furthermore,
large
clusters
also
facilitate
formation
an
effective
electrode–electrolyte
interphase,
thereby
enhancing
compatibility
with
electrodes.
enables
K||Prussian
blue
cells
(2–4.5
V)
operate
for
>700
cycles
capacity
retention
91.9%.
Our
paves
new
avenues
batteries
and
beyond.
Energy & Environmental Science,
Journal Year:
2024,
Volume and Issue:
17(15), P. 5613 - 5626
Published: Jan. 1, 2024
A
solubilization
and
stabilization
effect
of
trace
ethylene
carbonate
solvent
assisted
by
the
varied
molecule-ion
interaction
was
discovered
in
ether-based
electrolyte,
enabling
80
μm
Li
||
LiNi
0.8
Co
0.1
Mn
O
2
full-cell
operate
at
4.5
V
stably.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 23, 2025
Abstract
Electrolyte
engineering
plays
a
critical
role
in
tuning
lithium
plating/stripping
behaviors,
thereby
enabling
safer
operation
of
metal
anodes
batteries
(LMBs).
However,
understanding
how
electrolyte
microstructures
influence
the
process
at
molecular
level
remains
significant
challenge.
Herein,
using
commonly
employed
ether‐based
as
model,
each
component
is
elucidated
and
relationship
between
behavior
established
by
investigating
effects
compositions,
including
solvents,
salts,
additives.
The
variations
Li
+
deposition
kinetics
are
not
only
analyzed
characterizing
overpotential
exchange
current
density
but
it
also
identified
that
intermolecular
interactions
previously
unexplored
cause
these
2D
nuclear
overhauser
effect
spectroscopy
(NOESY).
An
interfacial
model
developed
to
explain
solvent
interactions,
distinct
roles
anions,
additives
desolvation
thermodynamic
stability
clusters
during
process.
This
clarifies
configurations
solvents
ions
related
macroscopic
properties
chemistry.
These
findings
contribute
more
uniform
controllable
deposition,
providing
valuable
insights
for
designing
advanced
systems
LMBs.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 2, 2025
Propylene
carbonate
(PC)
is
regarded
as
a
promising
solvent
for
replacing
ethylene
due
to
its
high
dielectric
constant
and
wide
working
temperature
range.
However,
the
co-intercalation
behavior
between
PC
Li+
on
graphite
poses
limitations
further
application.
In
this
study,
weakly
solvating
of
methyl
trifluoromethyl
(FEMC)
lithium
bis(oxalato)difluorophosphate
(LiDODFP)
synergistically
enable
reversible
cycling
low-concentration
PC-based
electrolytes
graphite.
Nuclear
magnetic
resonance
spectroscopy
theoretical
calculations
indicate
that
FEMC
partially
substitutes
in
solvation
structure
interacts
with
through
intermolecular
forces,
facilitating
desolvation
Li+.
Moreover,
utilization
LiDODFP
enhances
Li+,
effectively
resolving
compatibility
issue
PC.
This
electrolyte
exhibits
exceptional
oxidative
stability
nonflammability
properties.
At
cut-off
voltage
4.5
V,
NCM811/graphite
full
cell
88.86%
capacity
retention
after
300
cycles
at
25
°C,
retains
76.23%
100
60
°C;
even
-40
it
still
delivers
67
mAh
g-1.
work
presents
novel
strategy
developing
low-concentration,
wide-temperature-applicable,
high-safety,
high-voltage
electrolytes.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 18, 2025
Abstract
Potassium‐ion
batteries
(KIBs)
have
emerged
as
a
promising
alternative
to
lithium‐ion
due
the
abundance
and
low
cost
of
potassium
resources.
Coupled
with
commercial
graphite
anode,
KIBs
great
potential
for
next‐generation
large‐scale
electrochemical
energy
storage
devices.
However,
anode
in
suffers
from
rapid
capacity
decay
“potassium
hexafluorophosphate
(KPF
6
)
+
ethylene
carbonate
(EC)”
electrolytes.
These
issues
can
be
addressed
through
electrolyte
engineering,
which
has
been
proven
effective
improving
performance.
This
review
explores
underlying
mechanisms
K
graphite,
challenges
design,
recent
advancements
engineering
optimization
KIBs.
Angewandte Chemie International Edition,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 7, 2025
Abstract
K‐ion
batteries
face
significant
challenges
due
to
a
severe
shortage
of
active
K
ions,
with
cathode
materials
typically
containing
less
than
70%
ions
and
first‐cycle
irreversible
reactions
consuming
up
20%
more.
Conventional
compensation
methods
fail
supply
sufficient
without
compromising
cell
integrity.
To
address
this,
we
introduce
potassium
sulfocyanate
(KSCN)
as
an
electrolyte
additive
capable
delivering
100%
ions.
During
initial
charging,
KSCN
undergoes
oxidative
decomposition
at
3.6
V,
releasing
forming
the
cosolvent
thiocyanogen
((SCN)
2
).
This
molecule,
meeting
diverse
electrochemical
properties,
was
identified
using
unsupervised
machine
learning
cheminformatics.
The
approach
demonstrated
full
conversion
excellent
compatibility
all
components.
presence
(SCN)
enhanced
rate
capability
anodes
by
promoting
desolvation.
In
hard
carbon|K
0.5
Mg
0.15
[Mn
0.8
0.05
]O
pouch
cell,
this
tripled
capacity
through
supplying
58%
showcasing
practical
solution
for
in
batteries.
Angewandte Chemie International Edition,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 11, 2025
The
development
of
potassium-ion
batteries
(PIBs)
faces
significant
challenges
due
to
the
lack
suitable
electrolytes
achieve
satisfactory
energy
density
and
long-term
stability.
This
work
reports
an
innovative
compact-solvation
electrolyte
(CSE)
strategy
leveraging
ionic
liquid-induced
manipulation
solvation
structures
under
low
concentration
for
high-performance
PIBs.
CSE,
formulated
with
a
low-salt
0.8
M,
simultaneously
exhibits
compact
abundant
F-rich
anions,
high-ionic
conductivity,
low-desolvation
energy.
These
features
lead
enhanced
K-storage
thermodynamics
kinetics
through
formation
robust
KF-rich
solid
interphase
(SEI)
as
well
accelerated
K+
transport
kinetics.
Consequently,
graphite
electrode
in
CSE
delivers
high-reversible
capacity
252
mAh
g-1
average
Coulombic
efficiency
99.5%
after
300
cycles
at
50
mA
g.
Furthermore,
designed
enables
Prussian
blue||graphite
full
cell
operate
over
1450
g-1,
maintaining
impressive
retention
88%.
represents
advance
safe
compatible
advanced
Angewandte Chemie,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 11, 2025
Abstract
The
development
of
potassium‐ion
batteries
(PIBs)
faces
significant
challenges
due
to
the
lack
suitable
electrolytes
achieve
satisfactory
energy
density
and
long‐term
stability.
This
work
reports
an
innovative
compact‐solvation
electrolyte
(CSE)
strategy
leveraging
ionic
liquid‐induced
manipulation
solvation
structures
under
low
concentration
for
high‐performance
PIBs.
CSE,
formulated
with
a
low‐salt
0.8
M,
simultaneously
exhibits
compact
abundant
F‐rich
anions,
high‐ionic
conductivity,
low‐desolvation
energy.
These
features
lead
enhanced
K‐storage
thermodynamics
kinetics
through
formation
robust
KF‐rich
solid
interphase
(SEI)
as
well
accelerated
K
+
transport
kinetics.
Consequently,
graphite
electrode
in
CSE
delivers
high‐reversible
capacity
252
mAh
g
−1
average
Coulombic
efficiency
99.5%
after
300
cycles
at
50
mA
g.
Furthermore,
designed
enables
Prussian
blue||graphite
full
cell
operate
over
1450
,
maintaining
impressive
retention
88%.
represents
advance
safe
compatible
advanced
