Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
136(37)
Published: June 24, 2024
Abstract
Controlled
radical
copolymerizations
present
attractive
avenues
to
obtain
polymers
with
complicated
compositions
and
sequences.
In
this
work,
we
report
the
development
of
a
visible‐light‐driven
organocatalyzed
controlled
copolymerization
fluoroalkenes
acyclic
N
‐vinylamides
for
first
time.
The
approach
enables
on‐demand
synthesis
broad
scope
amide‐functionalized
main‐chain
fluoropolymers
via
novel
fluorinated
thiocarbamates,
facilitating
regulations
over
chemical
alternating
fractions
by
rationally
selecting
comonomer
pairs
ratios.
This
method
allows
temporally
chain‐growth
external
light,
maintains
high
chain‐end
fidelity
that
promotes
facile
preparation
block
Notably,
obtained
F/N
hybrid
polymers,
upon
hydrolysis,
afford
free
amino‐substituted
versatile
post
modifications
toward
various
functionalities
(e.g.,
amide,
sulfonamide,
carbamide,
thiocarbamide).
We
further
demonstrate
in
situ
formation
polymer
networks
desirable
properties
as
protective
layers
on
lithium
metal
anodes,
presenting
promising
avenue
advancing
batteries.
Industrial Chemistry and Materials,
Journal Year:
2023,
Volume and Issue:
2(2), P. 191 - 225
Published: Sept. 29, 2023
This
review
systematically
summarizes
the
research
progress
of
functional
binders
in
lithium-ion
batteries
and
elucidates
main
functions
advanced
to
deal
with
challenges
high-specific-energy
electrodes.
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
63(5)
Published: Dec. 11, 2023
High
energy
density
lithium-ion
batteries
(LIBs)
adopting
high-nickel
layered
oxide
cathodes
and
silicon-based
composite
anodes
always
suffer
from
unsatisfied
cycle
life
poor
safety
performance,
especially
at
elevated
temperatures.
Electrode
/electrolyte
interphase
regulation
by
functional
additives
is
one
of
the
most
economic
efficacious
strategies
to
overcome
this
shortcoming.
Herein,
cyano-groups
(-CN)
are
introduced
into
lithium
fluorinated
phosphate
synthesize
a
novel
multifunctional
additive
tetrafluoro
(1,2-dihydroxyethane-1,1,2,2-tetracarbonitrile)
(LiTFTCP),
which
endows
high
nickel
LiNi
Advanced Energy Materials,
Journal Year:
2023,
Volume and Issue:
14(2)
Published: Nov. 22, 2023
Abstract
Silicon
anodes
with
a
high
capacity
of
4200
mAh
g
−1
and
low
potential
0.3
V
(vs
Li
+
/Li)
enable
lithium‐ion
batteries
improved
energy
density.
However,
the
thickened
3D
solid‐electrolyte
interphase
(SEI)
formation
on
Si
particles
in
liquid
electrolytes
consumes
electrolyte/active
blocks
/e
−
transport,
resulting
fast
fading.
Herein,
high‐concentration
polymer
electrolyte
(HCPE)
is
designed
to
build
2D
SEI
anode
surface
instead
particles,
which
accommodates
volume
change
maintains
continuous
transport
pathways
as
well.
The
retarding
effect
NO
3
lowers
polymerization
rate
1,3‐dioxolane
(DOL),
enabling
6
m
LiFSI
dissolution.
concentration
takes
part
constructing
solvation
structure
pulls
DOL
away,
reducing
decomposition
poly‐DOL
(PDOL)
inducing
generation
LiF‐
N‐rich
mechanical
strength
capability.
As
result,
cell
using
HCPE
delivers
1765
at
2C
2000
after
100
cycles
0.2C,
superior
that
(617
)
low‐concentration
(45
).
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(34)
Published: April 30, 2024
Abstract
The
application
of
silicon
(Si)
anode
is
limited
by
the
drastic
volume
change
in
lithiation/delithiation
process,
repeated
formation
solid
electrolyte
interface
(SEI),
and
low
intrinsic
conductivity.
In
this
work,
a
small
amount
poly
(3,4‐ethylenedioxythiophene):poly
(styrene
sulfonic
acid)
(PEDOT:PSS)
(PP),
citric
acid
(CA),
isopropyl
alcohol
(IPA),
nanoparticles
(SiNPs)
are
mixed
vacuum
treated
at
specific
temperature
to
obtain
silicon‐based
electrode
composite
Si@PP@CA.
interphase
forms
robust
elastic
network
with
hydrogen
chemical
bonds,
which
have
good
mechanical
properties
self‐repairing
characteristics.
modified
PEDOT:PSS
as
conductive
medium
significantly
improves
charge
transfer
rate.
Moreover,
rapid
SEI
CA
on
surface
SiNPs
enhances
structural
stability
material.
electrochemical
results
show
that
capacity
Si@PP@CA
canretain
more
than
2200
mAh
g
−1
after
200
cycles
0.2
A
.
It
still
shows
high
retention
89%
even
current
density
1.0
2000
cycles.
More
importantly,
such
excellent
performance
can
be
obtained
using
an
active
material
content
up
90
wt%,
essential
for
practical
applications.
Nano Letters,
Journal Year:
2024,
Volume and Issue:
24(25), P. 7662 - 7671
Published: June 13, 2024
Extensive
investigations
have
proven
the
effectiveness
of
elastic
binders
in
settling
challenge
structural
damage
posed
by
volume
expansion
high-capacity
anode
used
nanoscale
silicon.
However,
sluggish
ionic
conductivity
polymer
binder
severely
restricts
electrode
reactions,
making
it
unsuitable
for
practical
applications.
Inspired
biological
tissues
with
rapid
neurotransmission
and
robust
muscles,
we
propose
a
biomimetic
that
contains
conductive
(by
polymerization
reaction
poly(ethylene
glycol)
diglycidyl
ether
polyethylenimine)
rigid
backbone
(polyacrylic
acid),
which
can
effectively
mitigate
both
Li-ion
transport
resistance
lithiation
stress
to
stabilize
silicon
nanoparticles
during
cycles.
Consequently,
achieves
rate
capability
1897
mAh
g–1
at
8.0
A
capacity
retention
87%
after
150
cycles
under
areal
upon
3.0
cm–2.
These
results
demonstrate
possibility
decoupling
from
mechanical
properties
toward
anodes
energy-dense
batteries.
