Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 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.
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 30, 2025
Abstract
Manganese‐based
layered
oxide
cathodes
(MLOCs)
have
emerged
as
competitive
candidates
for
high‐performance
rechargeable
batteries.
Building
on
their
success
in
lithium‐ion
batteries
(LIBs),
MLOCs
hold
great
promise
the
rapidly
developing
field
of
potassium‐ion
(PIBs)
due
to
low
cost,
high
theoretical
capacity,
and
environmental
friendliness.
However,
several
technical
challenges,
including
poor
structural
stability,
multiple
phase
transitions,
potassium
deficiency,
hindered
progress
PIB
research.
This
review
provides
a
comprehensive
overview
MLOCs,
covering
crystal
structures,
reaction
mechanisms,
chemical
compositions,
applications
PIBs.
More
importantly,
study
critically
analyzes
key
challenges
impeding
development
discusses
potential
strategies
overcoming
these
limitations.
Recent
advances
MLOC‐based
full
cells
are
also
summarized,
highlighting
future
potential.
Finally,
offers
perspectives
next‐generation
energy
storage
technologies.
It
is
hoped
that
this
will
spark
strong
interest
from
both
academic
industrial
communities,
driving
further
research
accelerating
practical
application
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 2, 2025
Abstract
The
sodium‐layered
transition
metal
oxides
(Na
x
TMO
2
)
are
regarded
as
the
promising
cathode
for
sodium‐ion
batteries
(SIBs)
relying
on
their
high
theory
capacity
and
cost‐effectiveness.
Nevertheless,
intrinsic
lattice
distortions
caused
by
Jahn‐Teller
active
ions
significantly
degrade
structural
stability
of
Na
,
generally
resulting
in
unsatisfactory
electrochemical
properties.
In
this
review,
begins
introducing
inducement
mechanisms
effect
(TM)
ions.
Subsequently,
restraining
strategies
well
corresponding
using
element
doping/substitutions,
surface
reconstructions,
polyphase
symbiosis,
TM/oxygen/Na
+
vacancy
manipulations
summarized
detail.
Specifically,
influences
such
mitigation
deformation
properties,
phase
evolution
behaviors,
TM
dissolution
characteristics,
crystal
comprehensively
discussed.
Furthermore,
sensible
utilization
distortion
is
to
build
cathodes
with
and/or
repaid
ion
transport
kinetics
well.
end,
challenges
faced
amelioration
methods
overviewed
put
forward
research
directions
future
trenchantly
constrain
6
octahedron
deformation.
This
work
will
provide
more
perceptions
further
studies
SIBs.
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(26), С. 15676 - 15684
Опубликована: Янв. 1, 2024
The
dual-site
doping
of
Li,
relies
on
transition
metal
site
substitution
to
reduce
the
Mn
3+
content,
suppresses
potential
J–T
effect
and
synergises
with
“pillar”
structure
formed
by
alkali
substitution.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 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.
