ACS Applied Energy Materials,
Journal Year:
2024,
Volume and Issue:
7(12), P. 5263 - 5274
Published: June 3, 2024
The
commercialization
of
the
layered
Li-rich
materials
as
one
promising
cathode
to
provide
high
energy
density
still
suffers
from
low
initial
Coulombic
efficiency,
rapid
capacity
loss,
and
voltage
degradation
materials.
To
overcome
intrinsic
drawbacks
materials,
herein,
a
multifunctional
modification
strategy
involving
surface
coating
along
with
ion
codoping
is
proposed.
It
revealed
that
Ti4+
PO43+
ions
achieved
during
high-temperature
calcination
can
synergistically
stabilize
crystal
structure
enlarge
lattice
cobalt-free
Li1.2Ni0.2Mn0.6O2,
consequently
enhancing
electrochemical
stability
rate
capability
As
result,
optimized
modification,
material
exhibits
excellent
charge/discharge
346.1/298.7
mAh·g–1
cycling
retention
90.0%
after
300
cycles
at
1
C.
LiTi2(PO4)3
reduce
decomposition
electrolyte
electrode/electrolyte
interface
cycling,
which
contributes
improvement
performance
Furthermore,
efficiently
prevent
irreversible
phase
conversion
crack
formation
upon
maintain
integrity
might
be
beneficial
design
material.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 9, 2025
Abstract
Li‐rich
layered
oxides
(LLO)
exhibit
a
distinctive
anionic
redox
capability,
enabling
them
to
deliver
exceptionally
high
specific
capacity.
However,
the
irreversibility
of
in
LLO
gives
rise
significant
issues,
including
oxygen
release
and
structure
phase
transitions.
These
challenges
adversely
affect
performance,
resulting
capacity
voltage
degradation,
thereby
hindering
commercialization
LLO.
Here,
density
functional
theory
(DFT)
is
employed
explore
electronic
LLO,
reveal
that
incorporation
Mg
Mo
elements
into
enhances
overlap
between
O
2p
nonbonding
orbital
(TM─O)
*
antibonding
orbital,
boosting
reversibility.
Experimental
results
corroborate
theoretical
predictions,
demonstrating
initial
Coulombic
efficiency
rises
from
80.8%
90.1%,
while
retention
increases
70.8%
95.3%
after
300
cycles
at
1
C.
Additionally,
full
cell
delivers
reversible
262.6
mAh
g
−1
0.1
This
work
presents
novel
method
for
modifying
through
co‐doping,
offering
new
insights
development
high‐performance
lithium‐ion
batteries.
Energy Advances,
Journal Year:
2024,
Volume and Issue:
3(8), P. 1869 - 1893
Published: Jan. 1, 2024
Doping,
coating,
surface
modification,
formation
of
composites
and
control
crystalline
orientation
can
the
capacity
retention
Ni-rich
cathodes.
Furthermore,
design
Co-free
cathodes
may
provide
a
cost-effective
solution.
