ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(50), С. 70057 - 70067
Опубликована: Дек. 10, 2024
LiNi0.5Mn1.5O4
(LNMO)
is
considered
one
of
the
most
promising
cathode
materials
for
high-energy-density
lithium-ion
batteries
(LIBs).
However,
free-radical-induced
carbonate
electrolyte
decomposition
a
key
factor
hindering
improvement
battery
stability.
Inspired
by
antioxidative
properties
ascorbic
acid
(AA)
in
scavenging
free
radicals,
addition
AA
during
electrode
fabrication
process
can
effectively
terminate
radical
chain
reactions
within
cycling
LNMO.
This
action
prevents
severe
decomposition,
thus
stabilizing
cathode–electrolyte
interface
(CEI)
and
ultimately
enhancing
The
results
demonstrate
that
LNMO||Li
half-cell
with
show
significantly
improved
performance
after
1000
cycles
at
1
C,
high
capacity
retention
rate
87.4%,
surpassing
43.6%
achieved
using
PVDF
alone
as
binder.
work
introduces
an
efficient
straightforward
strategy
designing
functional
additives
to
stabilize
phase
interfaces,
offering
economically
choice
enhance
electrochemical
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Фев. 5, 2024
Abstract
Adding
extra
raw
materials
for
direct
recycling
or
upcycling
is
prospective
battery
recycling,
but
overlooks
subtracting
specific
components
beforehand
can
facilitate
the
to
a
self-sufficient
mode
of
sustainable
production.
Here,
subtractive
transformation
strategy
degraded
LiNi
0.5
Co
0.2
Mn
0.3
O
2
and
LiMn
4
5
V-class
disordered
spinel
1.5
-like
cathode
material
proposed.
Equal
amounts
Ni
from
are
selectively
extracted,
remaining
transition
metals
directly
converted
into
0.4
0.1
(CO
3
)
precursor
preparing
with
in-situ
doping.
The
improved
conductivity
bond
strength
delivers
high-rate
(10
C
20
C)
high-temperature
(60
°C)
cycling
stability.
This
no
input
be
generalized
practical
black
mass
reduces
dependence
current
production
on
rare
elements,
showing
potential
spent
next-generation
Li-ion
industry.
Abstract
In
situ
polymerization
to
prepare
quasi‐solid
electrolyte
has
attracted
wide
attentions
for
its
advantage
in
achieving
intimate
electrode–electrolyte
contact
and
the
high
process
compatibility
with
current
liquid
batteries;
however,
gases
can
be
generated
during
remained
final
electrolyte,
severely
impairing
uniformity
electrochemical
performance.
this
work,
an
polymerized
poly(vinylene
carbonate)‐based
high‐voltage
sodium
metal
batteries
(SMBs)
is
demonstrated,
which
contains
a
novel
multifunctional
additive
N
‐methyl‐
‐(trimethylsilyl)trifluoroacetamide
(MSTFA).
MSTFA
as
high‐efficient
plasticizer
diminishes
residual
after
polymerization;
softer
homogeneous
enables
much
faster
ionic
conduction.
The
HF/H
2
O
scavenge
effect
of
mitigates
corrosion
free
acid
cathode
interfacial
passivating
layers,
enhancing
cycle
stability
under
voltage.
As
result,
4.4
V
Na||Na
3
(PO
4
)
F
cell
employing
optimized
possesses
initial
discharge
capacity
112.0
mAh
g
−1
retention
91.3%
100
cycles
at
0.5C,
obviously
better
than
those
counterparts
without
addition.
This
work
gives
pioneering
study
on
gas
residue
phenomenon
electrolytes,
introduces
silane
that
effectively
enhances
performance
SMBs,
showing
practical
application
significance.
Next Energy,
Год журнала:
2024,
Номер
4, С. 100136 - 100136
Опубликована: Май 13, 2024
Severe
capacity
degradation
at
high
operating
voltages
and
poor
interphase
stability
elevated
temperature
have
thus
far
precluded
the
practical
application
of
LiNi0.5Mn1.5O4
(LNMO)
as
a
cathode
material
for
lithium-ion
batteries.
Addressing
these
challenges
through
combination
experimental
theoretical
methods
in
this
work,
we
demonstrate
how
fluorinated
carbonate
electrolyte
enables
both
high-voltage
operation
by
mitigating
traditional
interfacial
reactions
observed
electrolytes
with
conventional
solvents.
Computational
studies
confirm
exceptional
oxidation
which
reduces
deprotonation
voltage.
The
mitigated
will
then
minimize
formation
HF
acid
corrodes
LNMO
surface
leads
to
phase
transformation
interphases.
With
temperature,
it
was
found
on
LNMO's
subsurface
reduced
amount
Mn3O4
can
block
Li+
transfer
result
drastic
cell
failure.
Leveraging
approach,
LNMO/graphite
full
cells
loading
3.0
mAh/cm2
achieve
excellent
cycling
stability,
retaining
∼84
%
their
initial
room
(25
°C)
after
200
cycles
∼68
100
55
°C.
This
advanced
also
shows
promise
improving
calendar
life,
>30
more
than
baseline
storage.
These
results
indicate
that
based
carbonates
are
promising
strategy
overcoming
remaining
toward
commercial
LNMO.
With
global
energy
demand
increasing
alongside
population
growth,
the
importance
of
efficient,
clean
conversion
systems
like
fuel
cells
and
batteries
intensifies.
Fuel
are
recognized
for
their
ability
to
generate
electricity
from
hydrogen
oxygen,
with
water
as
only
byproduct,
can
also
function
in
reverse
storage
by
producing
hydrogen.
Batteries
chemically
store
enable
zero‐carbon
emissions
through
closed‐loop
functionality.
As
grows,
electrochemical
impedance
spectroscopy
(EIS)
is
more
actively
used
investigating
various
physicochemical
properties
within
systems.
Furthermore,
EIS
serve
an
situ
analysis
method
during
operation,
making
it
even
impactful
near
future.
This
article
reviews
studies
applications
EIS,
advanced
technique
that
provides
insights
into
reaction
at
interfaces
charge
transfer
processes
these
In
addition,
overview
principles
governing
technologies,
a
focus
on
distinct
roles
mechanisms
components.
The
review
offers
deeper
understanding
studying
performance
while
covering
advancements
state‐of‐the‐art
technologies
cells,
electrolyzers,
batteries.
