Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 29, 2024
Abstract
The
electrochemical
performances
of
lithium‐ion
batteries
(LIBs)
will
be
significantly
degraded
under
low‐temperature
conditions,
which
restricts
their
wide
application
in
cold
environments.
Herein,
the
transport
kinetics
a
novel
Nb
1.94
Mo
0.06
O
5
@C
nanocomposite
anode
is
accelerated
greatly
via
engineering
microstructure
and
NbO
6
octahedron.
detailed
crystallographic
features
are
characterized
by
using
synchrotron
radiation,
spherical
electron
microscope,
density
functional
theory
simulation
methods.
Both
experimental
analysis
suggest
that
6+
preferentially
replaces
5+
regular
octahedral
location
distorts
octahedron,
resulting
widened
c
‐axis
spacing
lowered
ion
diffusion
barrier.
Coupled
with
enhanced
electronic
conductivity
derived
from
surface
carbon
layer,
exhibits
an
charge
transfer
process,
improved
Li
+
kinetics,
pronounced
pseudo‐capacitance
excellent
low
temperature
capacity.
Furthermore,
situ
X‐ray
diffraction
ex
microscope
elucidate
structural
evolution
highly
reversible,
unveiling
its
cycling
stability.
full
cell
assembled
LiNi
0.6
Co
0.2
Mn
2
cathode
demonstrates
practicality.
This
study
reveals
critical
role
distorting
octahedron
expanding
crystal
facilitating
rapid
enhancing
storage
performance
at
temperatures.
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 6, 2024
Abstract
In
the
research
report
of
cathode
potassium
ion
battery,
Mn‐based
layered
structural
oxides
have
attracted
researcher's
attention
because
its
good
energy
density
and
high
specific
rate
capacity.
However,
Jahn–Teller
effect
is
main
limiting
factor
for
their
development.
It
leads
to
expansion
deactivation
metal
during
cycling
a
long
time.
Therefore,
mitigation
considered
useful
measure
enhance
electrochemical
capability
oxide.
this
paper,
an
R
3
m‐type
K
0.4
Mn
0.7
Co
0.25
Zn
0.05
O
2
material
designed
through
doping
strategy.
X‐ray
diffraction
techniques
tests
verified
that
effectively
mitigated.
High
performance
achieved
in
capacity
test
with
113
mAh
g
−1
at
50
mA
.
Comparison
similar
materials
recent
years
has
demonstrated
superiority,
leading
among
reported
years.
The
practical
feasibility
assembled
full
cell
soft
carbon
anode
as
cathode.
test,
104.8
discharging
current
density.
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.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 21, 2025
Abstract
Low‐concentration
electrolytes
(LCEs)
present
significant
potential
for
actual
applications
because
of
their
cost‐effectiveness,
low
viscosity,
reduced
side
reactions,
and
wide‐temperature
electrochemical
stability.
However,
current
electrolyte
research
predominantly
focuses
on
regulation
strategies
conventional
1
m
electrolytes,
high‐concentration
localized
leaving
design
principles,
optimization
methods,
prospects
LCEs
inadequately
summarized.
face
unique
challenges
that
cannot
be
addressed
by
the
existing
theories
approaches
applicable
to
three
common
mentioned
above;
thus,
tailored
provide
development
guidance
are
urgently
needed.
Herein,
a
systematic
overview
recent
progress
in
is
provided
subsequent
directions
suggested.
This
review
proposes
core
challenge
high
solvent
ratio
LCEs,
which
triggers
unstable
organic‐enriched
electrolyte/electrode
interface
formation
anion
depletion
near
anode.
On
basis
these
issues,
modification
including
passivation
construction
solvent‒anion
interaction
optimization,
used
various
rechargeable
battery
systems.
Finally,
role
advanced
simulations
cutting‐edge
characterization
techniques
revealing
LCE
failure
mechanisms
further
highlighted,
offering
new
perspectives
future
practical
application
next‐generation
batteries.
Nature Communications,
Journal Year:
2025,
Volume and Issue:
16(1)
Published: April 25, 2025
Lithium-rich
layer
oxides
are
expected
to
be
high-capacity
cathodes
for
next-generation
lithium-ion
batteries,
but
their
performance
is
hindered
by
irreversible
anionic
redox,
leading
voltage
decay,
lag,
and
slow
kinetics.
In
order
solve
these
problems,
we
regulate
the
Ni/Mn
spin
state
in
Li1.2Mn0.6Ni0.2O2
Be
doping,
which
generates
superexchange
interaction
activates
Ni-t2g
orbitals.
The
activation
of
orbitals
triggers
reductive
coupling
mechanism
between
Ni/O,
improves
reversibility
kinetics
redox.
strong
π-type
Ni-t2g/O-2p
forms
a
stable
Ni-(O-O)
configuration,
suppressing
excessive
anion
oxidation.
this
work,
modified
have
good
cycle
stability,
0.04
mAh/g
0.5
mV
decay
per
over
400
cycles
at
1
C
(60
min,
250
mA
g-1),
with
rate
187
10
(6
2500
providing
strategy
stabilising
oxygen
redox
chemistry
designing
high
lithium-rich
cathodes.
