Advanced Energy Materials,
Год журнала:
2023,
Номер
14(8)
Опубликована: Дек. 15, 2023
Abstract
As
the
pursuit
of
greater
energy
density
for
portable
battery
has
stimulated
exhaustive
research
in
high‐voltage
lithium‐ion
batteries
(LIBs),
developing
electrolyte
additives
is
considered
a
cost‐efficient
way
to
improve
performance
battery.
Here,
three
interactional
issues
LiCoO
2
(LCO)
commercial
electrolytes
at
high
voltage
are
summarized,
this
review
first
identifies
an
unavoidable
vicious
cycle
voltage.
LCO/electrolyte
interphase
break,
dissolution
transition
metal
(TM)
ions,
and
formation
harmful
HF
accelerate
failing
progress
voltage,
besides
malfunction
anode
happens
same
time
because
electrode
crosstalk.
Then,
modification
summarized
according
solutions
cycle.
Last,
framework
future
on
LCO
outlined.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
63(8)
Опубликована: Дек. 13, 2023
Although
rechargeable
aqueous
zinc
batteries
are
cost
effectiveness,
intrinsicly
safe,
and
high
activity,
they
also
known
for
bringing
rampant
hydrogen
evolution
reaction
corrosion.
While
eutectic
electrolytes
can
effectively
eliminate
these
issues,
its
viscosity
severely
reduces
the
mobility
of
Zn
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июнь 4, 2024
Abstract
Sodium
metal
batteries
(SMBs)
remain
greatly
challenging
in
safety
and
stability.
Herein,
a
flame‐retardant
s
designed,
self‐purging
high‐voltage
electrolyte
is
designed
to
stabilize
SMBs
with
the
use
of
ethoxy
(pentafluoro)
cyclotriphosphazene
(PFPN)
as
additive.
PFPN
can
participate
shell
structure
solvation
through
stronger
van
der
Waals
force
form
Na
3
N,
NaF‐rich
solid/cathode
interphase
(SEI/CEI)
electronic
insulation
fast
ion
transport.
Moreover,
harmful
impurity
(PF
5
)
also
be
scavenged
by
avoid
HF
production,
which
helps
electrode
interface.
Additionally,
combustion
radicals
(H,
HO)
cleared
between
radical
(RPO)
formed
breaking
for
flame‐retardation
purpose.
As
expected,
Na||Na
V
2
(PO
4
O
F
battery
modified
deliver
reservation
92.4%,
CE
99.71%
after
2000
cycles,
simultaneously
possess
excellent
high‐rate
charging/slow
discharging
performance.
As
a
representative
in
the
post-lithium-ion
batteries
(LIBs)
landscape,
lithium
metal
(LMBs)
exhibit
high-energy
densities
but
suffer
from
low
coulombic
efficiencies
and
short
cycling
lifetimes
due
to
dendrite
formation
complex
side
reactions.
Separator
modification
holds
most
promise
overcoming
these
challenges
because
it
utilizes
original
elements
of
LMBs.
In
this
review,
separators
designed
address
critical
issues
LMBs
that
are
fatal
their
destiny
according
target
electrodes
focused
on.
On
anode
side,
functional
reduce
propagation
with
conductive
lithiophilic
layer
uniform
Li-ion
channel
or
form
stable
solid
electrolyte
interphase
through
continuous
release
active
agents.
The
classification
solving
degradation
stemming
cathodes,
which
has
often
been
overlooked,
is
summarized.
Structural
deterioration
resulting
leakage
cathode
materials
suppressed
by
acidic
impurity
scavenging,
transition
ion
capture,
polysulfide
shuttle
effect
inhibition
separators.
Furthermore,
flame-retardant
for
preventing
LMB
safety
multifunctional
discussed.
Further
expansion
can
be
effectively
utilized
other
types
batteries,
indicating
intensive
extensive
research
on
expected
continue
LIBs.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(23)
Опубликована: Март 22, 2024
The
practical
application
of
lithium
metal
batteries
(LMBs)
has
been
hindered
by
limited
cycle-life
and
safety
concerns.
To
solve
these
problems,
we
develop
a
novel
fluorinated
phosphate
cross-linker
for
gel
polymer
electrolyte
in
high-voltage
LMBs,
achieving
superior
electrochemical
performance
high
simultaneously.
cross-linked
(FP-GPE)
in-situ
polymerization
method
not
only
demonstrates
oxidation
stability
but
also
exhibits
excellent
compatibility
with
anode.
LMBs
utilizing
FP-GPE
realize
stable
cycling
even
at
cut-off
voltage
4.6
V
(vs
Li/Li
Abstract
Increasing
the
charging
cut‐off
voltage
(e.g.,
4.6
V)
to
extract
more
Li
ions
are
pushing
LiCoO
2
(LCO)
cathode
achieve
a
higher
energy
density.
However,
an
inhomogeneous
cycled
bulk‐to‐surface
distribution,
which
is
closely
associated
with
enhanced
extracted
ions,
usually
ignored,
and
severely
restricts
design
of
long
lifespan
high
LCO.
Here,
strategy
by
constructing
artificial
solid–solid
diffusion
environment
on
LCO's
surface
proposed
homogeneous
distribution
upon
cycling.
The
optimized
LCO
not
only
shows
highly
reversible
capacity
212
mA
h
g
−1
but
also
ultrahigh
retention
80%
over
600
cycles
at
V.
Combined
in
situ
X‐ray
diffraction
measurements
stress‐evolution
simulation
analysis,
it
revealed
that
superior
V
long‐cycled
stability
ascribed
reduced
structure
stress
leaded
diffusion.
This
work
broadens
approaches
for
stable
layered
oxide
cathodes
low
ion‐storage
stress.
Advanced Energy Materials,
Год журнала:
2024,
Номер
14(11)
Опубликована: Фев. 5, 2024
Abstract
Various
electrolyte
additives
are
developed
to
construct
a
cathode
interphase
(CEI)
layer
for
high‐voltage
LiCoO
2
since
the
suffers
severe
interfacial
degradation
when
increasing
cut‐off
voltage
over
4.55
V.
However,
CEI
derived
from
additive
sacrificial
reaction
faces
risk
of
rupture
due
corrosion
and
volumetric
variation
cathode.
Herein,
non‐passivating
interface
is
realized
4.6
V
with
non‐sacrificial
(TBAClO
4
)
by
regulating
solvent
environment
at
rather
than
preferential
decomposition
formation.
Owing
novel
protection
mechanism,
cell
performance
shows
little
dependence
on
CEI‐formation
process.
Therefore,
an
ultra‐high
initial
coulombic
efficiency
(96.63%)
excellent
cycling
stability
(81%
capacity
retention
after
300
cycles)
achieved
in
Li||LiCoO
batteries.
Moreover,
even
containing
1000
ppm
H
O,
remarkable
water
capture
ability
together
its
regulation
enables
battery
retain
80%
200
cycles.
This
strategy
provides
new
insights
into
design
high‐energy‐density
lithium
metal
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июнь 10, 2024
Abstract
The
development
of
lithium–metal
batteries
(LMBs)
has
emerged
as
a
mainstream
approach
for
achieving
high‐energy‐density
energy
storage
devices.
stability
electrochemical
interfaces
plays
an
essential
role
in
realizing
stable
and
long‐life
LMBs.
Despite
extensive
comprehensive
research
on
the
lithium
anode
interface,
there
is
limited
focus
cathode
particularly
regarding
high‐voltage
transition
metal
oxide
materials.
In
this
review,
challenges
associated
with
developing
materials
are
first
discussed.
Characterization
techniques
understanding
composition
structure
cathode–electrolyte
interphase
(CEI)
then
introduced.
Subsequently,
recent
developments
electrolyte
design
interface
modification
constructing
CEI
summarized.
Finally,
perspectives
future
trends
This
review
can
offer
valuable
guidance
designing
CEI,
pushing
forward
Abstract
The
improvement
of
the
safety,
specific
energy,
cycle
life
and
cost
reduction
Li‐ion
batteries
are
hot
research
topics.
Now,
in
pursuit
high
energy
density,
employed
high‐energy‐density
cathode/anode
materials
increased
operation
voltage
challenge
prevalent
electrolyte
formula,
like
existing
ester
ether
electrolytes
cannot
withstand
high‐voltage
high‐capacity
anode
such
as
lithium
(Li),
silicon
(Si)
silicon‐graphite
(Si−C)
composite
anode.
It
is
recognized
that
stable
electrolyte‐electrode
interfaces
can
avoid
side
reactions
protect
electrode
materials.
Up
to
now,
various
additives
have
been
developed
modify
electrode‐electrolyte
interfaces,
famous
4‐fluoroethylene
carbonate,
vinylene
carbonate
nitrate,
LIBs
metal
(LMBs)
performances
improved
greatly.
However,
lifespan
higher‐energy‐density
with
Li/Si/Si−C
high‐nickel
layer
oxides
cathode
meet
request
due
lack
ideal
formula.
In
this
review,
we
present
a
comprehensive
in‐depth
overview
on
additives,
especially
focused
multifunctional
reaction
mechanisms
fundamental
design.
Finally,
novel
insights,
promising
directions
potential
solutions
for
proposed
motivate
Li
battery
chemistries.
