National Science Review,
Год журнала:
2024,
Номер
12(2)
Опубликована: Дек. 3, 2024
ABSTRACT
In-situ
fabricated
polyether
electrolytes
have
been
regarded
as
one
of
the
most
promising
solid
electrolyte
systems.
Nevertheless,
they
cannot
match
high-voltage
cathodes
over
4.3
V
due
to
their
poor
oxidative
stability.
Herein,
we
propose
an
effective
local
charge
homogenization
strategy
based
on
triglycidyl
isocyanurate
(TGIC)
crosslinker,
achieving
ultra-high-voltage
electrochemical
stability
(viz.
PTIDOL)
at
cutoff
voltages
up
4.7
V.
The
introduction
TGIC
optimizes
Li+
solvation
environment,
thereby
homogenizing
distribution
ether
oxygen
(EO)
sites,
resulting
in
significantly
enhanced
main
chain.
Consequently,
Li|PTIDOL|LiNi0.6Co0.2Mn0.2O2
(NCM622)
cell
achieves
long-term
operation
ultra-high
voltage
with
a
capacity
retention
81.8%
after
400
cycles,
best
results
reported
for
date.
This
work
provides
significant
insights
development
tolerance
and
advancement
high-energy-density
batteries.
Advanced Energy Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 17, 2024
Abstract
Solid‐state
batteries
(SSBs)
have
attracted
much
attention
for
high‐energy‐density
and
high‐safety
energy
storage
devices.
Solid
polymer
electrolytes
(SPEs)
emerged
as
a
critical
component
in
the
advancement
of
SSBs,
owing
to
compelling
advantages
strong
molecular
structure‐designability,
low
cost,
easy
manufacturing,
no
liquid
leakage.
However,
linear
SPEs
usually
room‐temperature
ionic
conductivity
due
crystallization,
melting
at
high
temperature.
Thus,
crosslinked
been
proposed
that
chemical
bonding
between
internal
molecule
chains
can
maintain
solid
state
expand
operational
temperature,
disrupt
regularity
segment,
diminish
crystalline
degree,
leading
an
enhancement
conductivity.
Furthermore,
integration
functional
groups
within
SPE
network
significantly
augment
electrochemical
performance
SPEs.
Herein,
according
structure,
are
categorized
into
four
types:
simple
network,
AB
polymers
(ABCP),
semi‐interpenetrating
(semi‐IPN),
interpenetrating
(IPN),
then
structure
features
disadvantages
commonly
used
these
types
reviewed.
In
addition,
with
self‐healing,
flame‐retardant,
degradable,
recyclability
introduced.
Finally,
challenges
prospects
summarized,
hoping
provide
guidance
design
future.
The
operation
of
all-solid-state
lithium-metal
batteries
is
primarily
constrained
by
an
inferior
solid
electrolyte.
Here,
we
employ
a
porous
dielectric
fluorinated
electrolyte
to
encapsulate
Li+
complex,
achieving
rapid
and
stable
ion
conduction
throughout
cycling.
comprises
nanofiber
(NF)
skeleton
made
BaTiO3
(F-BaTiO3-δ)
all-trans
block
copolymer
PVDF-b-PTFE,
with
encapsulated
poly(ethylene
oxide)
(PEO)-LiTFSI
filler.
polarized
NFs
effectively
dissociate
LiTFSI
form
conductive
while
F-BaTiO3-δ
bonds
PVDF-b-PTFE
PEO
create
cross-phase
Li+-conduction
paths.
This
results
in
high
room-temperature
conductivity
5.64
×
10-4
S
cm-1
low
activation
energy
0.21
eV.
Additionally,
the
achieves
dynamic
interface
stability
eliminating
space
charge
layer
on
cathode
internal
stress
anode.
LiFePO4//Li
can
cycle
stably
1000
times
at
0.5
C
capacity
retention
87.45%.
Furthermore,
NCM811//Li
30-Ah-pouch
cells
also
demonstrate
cycling
stability,
showcasing
potential
commercial
applications.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 27, 2025
Abstract
Constructing
solid
polymer
electrolytes
for
fast‐charging
solid‐state
lithium
batteries
is
essential
but
extremely
challenging
due
to
the
poor
ionic
conductivity
and
large
interfacial
impedance.
Herein,
a
coordinated
Li
+
transport
network
electrolyte
linked
by
weak
bonding
designed
fabricated,
featuring
high
of
1.14
×
10
−3
S
cm
−1
at
30
°C
broad
electrochemical
window
4.82
V.
The
interaction
carboxyl‐functionalized
liquid
metal–organic
framework
with
polymers
constructs
fast
ion
migration
path
facilitates
dissociation
salt
obtain
more
free
ions,
which
beneficial
ability.
Thus,
remarkable
rate
capability
cycling
performance
are
obtained
specific
capacity
96.2
mAh
g
6
C
even
after
than
500
cycles
retention
as
98.9%
in
LiFePO
4
||Li
cells.
Such
outperforms
many
recent
reports
can
be
attributed
local
inter‐radical
interactions
LiF‐rich
interphase.
This
work
not
only
confirms
importance
also
provides
insights
into
designing
capable
charging.
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 27, 2025
Abstract
The
low
ionic
conductivity
of
polymer
electrolytes
at
room
temperature,
coupled
with
challenges
associated
lithium
dendrite
formation,
has
impeded
their
practical
applications.
To
mitigate
these
issues,
this
study
employs
a
supramolecular
strategy
that
utilizes
the
quantum
size
effect
carbon
dots
and
physical
cross‐linking
abundant
surface
functional
groups
to
enhance
electrochemical
properties
electrolytes.
dot‐assembled
cross‐linked
gel
(CDPE)
establish
hydrogen‐bonding
network
between
molecular
chains,
crystalline
phase
is
suppressed,
diverse
efficient
transport
pathway
created
within
electrolyte.
This
significantly
improves
its
up
3.20
mS
cm
−1
30
°C.
Additionally,
interaction
fluoroethylene
carbonate
facilitates
formation
multiphase
solid‐electrolyte
interphase,
effectively
suppressing
growth
dendrites
markedly
improving
long‐term
stability
metal
batteries.
Li||LiFePO
4
battery
CDPE
demonstrates
92%
capacity
retention
after
2000
cycles
rate
2.0
C,
revealing
superior
overall
cycling
performance
compared
covalent
systems.
carbon‐dot‐based
proposed
in
paves
way
for
innovative
design
industrial
applications
high‐performance
composite
Chemistry - A European Journal,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 11, 2024
Abstract
In
pursuit
of
high
energy
density,
lithium
metal
batteries
(LMBs)
are
undoubtedly
the
best
choice.
However,
leakage
and
inevitable
dendrite
growth
in
liquid
electrolytes
seriously
hinder
its
practical
application.
Solid/quasi‐solid
state
have
emerged
as
an
answer
to
solve
above
issues.
Especially,
polymer
with
excellent
interface
compatibility,
flexibility,
ease
machining
become
a
research
hotspot
for
LMBs.
Nevertheless,
contact
between
electrolyte
inorganic
electrode
materials
low
ionic
conductivity
restrict
development.
On
account
these,
situ
polymerized
is
proposed.
Polymer
solid
produced
through
polymerization
promote
robust
while
simplifying
preparation
steps.
This
review
summarized
latest
progress
These
were
divided
into
three
parts
according
their
methods:
thermally
induced
polymerization,
chemical
initiator
ionizing
radiation
so
on.
Furthermore,
we
concluded
major
challenges
future
trends
It's
hoped
that
this
will
provide
meaningful
guidance
on
designing
high‐performance
