Angewandte Chemie,
Год журнала:
2023,
Номер
136(5)
Опубликована: Дек. 13, 2023
Abstract
Compensating
the
irreversible
loss
of
limited
active
lithium
(Li)
is
essentially
important
for
improving
energy‐density
and
cycle‐life
practical
Li‐ion
battery
full‐cell,
especially
after
employing
high‐capacity
but
low
initial
coulombic
efficiency
anode
candidates.
Introducing
prelithiation
agent
can
provide
additional
Li
source
such
compensation.
Herein,
we
precisely
implant
trace
Co
(extracted
from
transition
metal
oxide)
into
site
2
O,
obtaining
(Li
0.66
0.11
□
0.23
)
O
(CLO)
cathode
agent.
The
synergistic
formation
vacancies
Co‐derived
catalysis
efficiently
enhance
inherent
conductivity
weaken
Li−O
interaction
which
facilitates
its
anionic
oxidation
to
peroxo/superoxo
species
gaseous
,
achieving
1642.7
mAh/g
~Li2O
capacity
(≈980
agent).
Coupled
6.5
wt
%
CLO‐based
with
LiCoO
cathode,
substantial
stored
within
CLO
released
compensate
consumption
on
SiO/C
anode,
270
Wh/kg
pouch‐type
full‐cell
92
retention
1000
cycles.
Advanced Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 8, 2025
The
Ag-C
composite
anodes
facilitate
stable
LixAg
deposition
in
solid-state
batteries.
However,
the
role
of
carbon
and
kinetics
lithium
migration
structure
remain
unclear.
Few
studies
have
focused
on
this
critical
research
area
owing
to
a
shortage
effective,
non-destructive
characterization
methods
that
can
directly
observe
Li
alloy
process
batteries
real
time.
In
study,
formation
anode
is
investigated
through
operando
X-ray
diffraction
(XRD)
analysis
scanning
electron
microscopy
combined
with
situ
probing.
This
enables
observation
composition
morphology
as
it
evolves
within
during
discharge.
Further
insights
from
transmission
microscopy-electron
energy
loss
spectroscopy
first-principles
simulations
lithiophilicity
barrier
for
reveal
complex
mechanism
anode.
Abstract
Regulating
the
distribution
of
surface
elements
in
lithium‐rich
cathode
materials
can
effectively
change
electrochemical
performance
materials.
Considering
that
enrichment
Mn
element
on
is
main
reason
for
irreversible
phase
transition
and
dissolution
its
structure,
which
turn
degradation.
Based
molten
salt‐assisted
sintering
method,
a
lithium
rich
material
with
Ni
Co
designed
prepared.
The
reduces
Mn,
promotes
occurrence
collapse
structure
from
layered
to
rock
salt
surface,
improves
stability
crystal
cycling
positive
electrode
Notably,
after
500
cycles
at
1
C
current
density,
discharge‐specific
capacity
attained
189.8
mAh
g
−1
,
retention
rate
88.9%,
indicating
42.1%
improvement
retention.
Molten
treatment
widely
used
modification
research
work
will
provide
new
ideas
improving
promoting
their
commercial
applications.
Angewandte Chemie,
Год журнала:
2023,
Номер
136(5)
Опубликована: Дек. 13, 2023
Abstract
Compensating
the
irreversible
loss
of
limited
active
lithium
(Li)
is
essentially
important
for
improving
energy‐density
and
cycle‐life
practical
Li‐ion
battery
full‐cell,
especially
after
employing
high‐capacity
but
low
initial
coulombic
efficiency
anode
candidates.
Introducing
prelithiation
agent
can
provide
additional
Li
source
such
compensation.
Herein,
we
precisely
implant
trace
Co
(extracted
from
transition
metal
oxide)
into
site
2
O,
obtaining
(Li
0.66
0.11
□
0.23
)
O
(CLO)
cathode
agent.
The
synergistic
formation
vacancies
Co‐derived
catalysis
efficiently
enhance
inherent
conductivity
weaken
Li−O
interaction
which
facilitates
its
anionic
oxidation
to
peroxo/superoxo
species
gaseous
,
achieving
1642.7
mAh/g
~Li2O
capacity
(≈980
agent).
Coupled
6.5
wt
%
CLO‐based
with
LiCoO
cathode,
substantial
stored
within
CLO
released
compensate
consumption
on
SiO/C
anode,
270
Wh/kg
pouch‐type
full‐cell
92
retention
1000
cycles.
