ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(40), С. 53665 - 53674
Опубликована: Авг. 20, 2024
Silicon/graphite
composites
show
a
high
specific
capacity
and
improved
cycling
stability.
However,
the
intrinsic
difference
between
silicon
graphite,
such
as
unequal
volume
expansion
lithium-ion
diffusion
kinetics,
causes
persistent
stress
at
silicon/graphite
interface
of
electrical
isolation
region.
Herein,
carbon
nanotubes
(CNTs)
were
successfully
introduced
into
silicon/carbon
via
ball
milling
spray
drying,
which
effectively
relieved
concentration
direct
contact
formed
three-dimensional
conductive
structure.
In
addition,
CNTs
amorphous
acting
"lubricants"
further
inherent
differences
graphite.
As
result,
Si/CNTs/G@C-1
anode
increased
performance
rate
capability,
with
reversible
up
to
465
mAh
g
Abstract
Biomass‐derived
carbon
is
a
promising
electrode
material
in
energy
storage
devices.
However,
how
to
improve
its
low
capacity
and
stability,
slow
diffusion
kinetics
during
lithium
remains
challenge.
In
this
research,
we
propose
“self‐assembly‐template”
method
prepare
B,
N
codoped
porous
(BN‐C)
with
nanosandwich
structure
abundant
pyridinic
N‐B
species.
The
can
increase
powder
density
cycle
stability
by
constructing
stable
solid
electrolyte
interphase
film,
shortening
the
Li
+
pathway,
accommodating
volume
expansion
repeated
charging/discharging.
species
simultaneously
promote
adsorption/desorption
of
/PF
6
−
reduce
barrier.
BN‐C
showed
high
lithium‐ion
above
1140
mAh
g
−1
at
0.05
A
superior
(96.5%
retained
after
2000
cycles).
Moreover,
owing
synergistic
effect
species,
assembled
symmetrical
BN‐C//BN‐C
full
cell
shows
234.7
W
h
kg
,
power
39.38
kW
excellent
cycling
most
other
cells
reported
literature.
As
functional
theory
simulation
demonstrated,
enhanced
adsorption
activity
for
PF
which
promotes
an
anode
cathode,
respectively.
Meanwhile,
relatively
lower
barrier
migration,
resulting
good
rate
performance.
Therefore,
study
provides
new
approach
modulation
nanostructure
active
site
fabricate
Advanced Materials,
Год журнала:
2024,
Номер
36(38)
Опубликована: Июль 31, 2024
Abstract
Solid‐state
lithium‐ion
batteries
(SSLIBs)
have
been
considered
as
the
priority
candidate
for
next‐generation
energy
storage
system,
due
to
their
advantages
in
safety
and
density
compare
with
conventional
liquid
electrolyte
systems.
However,
introduction
of
numerous
solid‐solid
interfaces
results
a
series
issues,
hindering
further
development
SSLIBs.
Therefore,
thorough
understanding
on
interfacial
issues
is
essential
promote
practical
applications
In
this
review,
interface
are
discussed
from
perspective
transportation
mechanism
electrons
lithium
ions,
including
internal
within
cathode/anode
composites
solid
electrolytes
(SEs),
well
apparent
electrode/SEs
interfaces.
The
corresponding
modification
strategies,
such
passivation
layer
design,
conductive
binders,
thermal
sintering
methods,
comprehensively
summarized.
Through
establishing
correlation
between
carrier
transport
network
battery
electrochemical
performance,
design
principles
achieving
selective
systematically
elucidated.
Additionally,
future
challenges
speculated
research
directions
tailoring
structure
By
providing
insightful
review
outlook
charge
transfer,
industrialization
SSLIBs
aimed
promoted.
ACS Energy Letters,
Год журнала:
2024,
Номер
9(5), С. 2109 - 2115
Опубликована: Апрель 11, 2024
The
special
chemistry
of
N,N-dimethylformamide
(DMF)-solvated
Li+
[Li(DMF)x]+
migration
results
in
polyvinylidene
fluoride
(PVDF)-based
solid
polymer
electrolytes
exhibiting
high
ionic
conductivities.
Incorporating
ceramic
fillers
into
PVDF
can
further
enhance
the
However,
there
is
limited
understanding
desolvation
process
during
its
transport
through
fillers.
Herein,
we
reveal
that
this
exhibits
a
large
energy
barrier
hinders
transport.
introduction
poly(methylhydrosiloxane)
(PMHS)
weaken
ion–solvent
coordination,
forming
loosely
complexed
and
reducing
their
energy.
This
promotes
rapid
ceramic-involved
pathways,
enabling
electrolyte
with
ambient
conductivity
7.5
×
10–4
S
cm–1.
Moreover,
facile
kinetics
reduce
side
reactions
at
electrode/electrolyte
interfaces.
Therefore,
solid-state
Li–Li
symmetric
cells
operate
for
record
11
800
h,
LiNi0.8Co0.1Mn0.1O2|Li
batteries
also
demonstrated
exceptional
cycling
stability
more
than
2200
cycles
2C.
Green Chemistry,
Год журнала:
2024,
Номер
26(18), С. 9529 - 9553
Опубликована: Янв. 1, 2024
Next-generation
energy
storage
systems
rely
heavily
on
the
capability
of
fast
charging
as
they
allow
electronic
devices
to
be
charged
within
a
remarkably
brief
period.
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(17), С. 10412 - 10421
Опубликована: Янв. 1, 2024
A
flexible-rigid
covalent
nano-template
can
synergistically
regulate
the
MPSi
anode
structure
organization
and
internal/interface
interactions
for
ultrarobust
Li-ion
batteries.
