Abstract
High‐capacity
O3‐type
lithium‐rich
manganese‐based
(LRM)
materials
exhibit
significant
structural
instability
and
severe
voltage
decay,
which
limit
their
practical
applications.
In
contrast,
the
O2‐type
LRM
demonstrate
remarkable
stability
despite
offering
lower
capacity.
this
study,
a
composite
material,
O3@O2‐LRM
is
designed,
by
coating
main
structure
of
with
minor
amount
to
combine
high
capacity
O3
phase
superior
O2
phase.
Electrochemical
tests
that
exhibits
both
specific
reduced
decay.
Furthermore,
series
characterizations
after
different
cycles
confirm
its
enhanced
compared
O3‐LRM.
This
novel
holds
great
promise
for
developing
advanced
cathode
capable
meeting
demanding
requirements
next‐generation
Li‐ion
batteries.
ACS Applied Energy Materials,
Год журнала:
2025,
Номер
8(1), С. 99 - 107
Опубликована: Янв. 2, 2025
Layered
P2-type
Na0.67Ni0.33Mn0.67O2
(NNMO)
is
regarded
as
a
viable
cathode
material
because
of
its
open
structure,
high
theoretical
capacity,
and
simplicity
in
preparation.
However,
it
suffers
from
intrinsic
lattice
distortion,
complex
phase
transitions,
severe
Na+/vacancy
ordering
issues.
In
this
study,
the
synthesized
Na0.78Li0.05Cu0.05Ni0.25Mn0.6Ti0.05O2
(NLCNMTO)
introduces
substitution
Li,
Cu,
Ti
for
Ni
Mn.
Through
synergistic
effect
multiple
ions,
structural
stability
improved
transition
are
suppressed
at
voltage.
NLCNMTO
materials
have
better
ionic
conductivity
stronger
TM–O
covalent
bonds,
which
improves
composites'
diffusion
rate
stability.
It
stabilized
P2
over
voltage
range
2–4.5
V
with
good
cycling
multiplicative
performance.
This
study
provides
possible
multi-ion
codoping
design
advanced
SIBs
optimized
high-voltage
activity
well
excellent
Abstract
Li‐ion
batteries
(LIBs)
are
the
dominant
electrochemical
energy
storage
devices
in
global
society,
which
cathode
materials
key
components.
As
a
requirement
for
higher
energy‐dense
LIBs,
Li‐rich
layered
oxides
(LLO)
cathodes
that
can
provide
specific
capacity
urgently
needed.
However,
LLO
still
face
several
significant
challenges
before
bringing
these
to
market.
In
this
Review,
fundamental
understanding
of
is
described,
with
focus
on
physical
structure‐electrochemical
property
relationships.
Specifically,
various
strategies
toward
reversible
anionic
redox
discussed,
highlighting
approaches
take
basic
structure
battery
into
account.
addition,
application
all‐solid‐state
and
consider
prospects
assessed.
