Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 25, 2025
Abstract
3D
porous
current
collectors
(CCs)
play
a
critical
role
in
ensuring
uniform
lithium
(Li)
deposition
and
distributing
density
evenly
across
electrode
surfaces.
These
attributes
are
essential
for
improving
the
safety
stability
of
Li
metal
batteries.
However,
copper
(Cu)
‐based
CCs
face
notable
drawbacks,
such
as
rigid
structures,
insufficient
pore
volume,
excessive
mass,
weak
intrinsic
lithiophilicity
Li,
which
hinder
their
performance.
To
overcome
these
limitations,
novel
self‐assembly
method
is
developed
to
construct
highly
expandable
bidirectional‐gradient
collector
(EBG
CC).
This
advanced
design
integrates
Cu‐silver
(Ag)
‐Cu
nanowires
offers
high
porosity,
provides
ample
space
deposition.
The
unique
gradients
conductivity
within
EBG
CC
enable
nucleation,
thereby
stable
efficient
cycling
Electrochemical
testing
half‐cell
symmetric
cell
configurations
demonstrated
CC's
superior
rate
capabilities
long‐term
capacity
retention.
Additionally,
bidirectional
pouch
configured
Li/EBG
|
LiFePO
4
delivered
an
impressive
discharge
160.3
mAh
g⁻¹
at
1C.
results
underline
potential
lightweight,
porous,
mitigating
dendrite
growth
significantly
enhancing
performance
anodes.
Advanced Materials,
Год журнала:
2023,
Номер
35(26)
Опубликована: Март 19, 2023
Abstract
Lithium–sulfur
(Li–S)
batteries
are
considered
as
one
of
the
most
promising
candidates
to
achieve
an
energy
density
500
Wh
kg⁻
1
.
However,
challenges
shuttle
effect,
sluggish
sulfur
conversion
kinetics,
and
lithium‐dendrite
growth
severely
obstruct
their
practical
implementation.
Herein,
multiscale
V
2
C
MXene
(VC)
with
a
spherical
confinement
structure
is
designed
high‐efficiency
bifunctional
promotor
for
evolution
lithium
species
in
Li–S
batteries.
Combining
synchrotron
X‐ray
3D
nano‐computed
tomography
(X‐ray
nano‐CT),
small‐angle
neutron
scattering
(SANS),
first‐principle
calculations,
it
revealed
that
activity
VC
can
be
maximized
by
tuning
scale,
as‐attained
functions
conducted
follows:
(i)
acts
efficient
polysulfide
(LiPS)
scavenger
due
large
number
active
sites;
(ii)
exhibits
significantly
improved
electrocatalytic
function
Li
S
nucleation
decomposition
reaction
kinetics
owing
scale
effect;
(iii)
regulate
dynamic
behavior
Li‐ions
thus
stabilize
plating/stripping
effectively
on
account
unique
ion‐sieving
effect.
Advanced Functional Materials,
Год журнала:
2023,
Номер
33(29)
Опубликована: Апрель 2, 2023
Abstract
Lithium
metal
(LM)
is
a
promising
anode
material
for
next
generation
lithium
ion
based
electrochemical
energy
storage
devices.
Critical
issues
of
unstable
solid
electrolyte
interphases
(SEIs)
and
dendrite
growth
however
still
impede
its
practical
applications.
Herein,
composite
gel
polymer
(GPE),
formed
through
in
situ
polymerization
pentaerythritol
tetraacrylate
with
fumed
silica
fillers,
developed
to
achieve
high
performance
batteries
(LMBs).
As
evidenced
theoretically
experimentally,
the
presence
SiO
2
not
only
accelerates
Li
+
transport
but
also
regulates
solvation
sheath
structures,
thus
facilitating
fast
kinetics
formation
stable
LiF‐rich
interphase
achieving
uniform
depositions
suppress
growth.
The
GPE‐based
Li||Cu
half‐cells
Li||Li
symmetrical
cells
display
Coulombic
efficiency
(CE)
90.3%
after
450
cycles
maintain
stability
over
960
h
at
3
mA
cm
−2
mAh
,
respectively.
In
addition,
Li||LiFePO
4
full‐cells
LM
limited
supply
capacity
retention
68.5%
700
0.5
C
(1
=
170
g
−1
).
Especially,
when
further
applied
anode‐free
LMBs,
carbon
cloth||LiFePO
full‐cell
exhibits
excellent
cycling
an
average
CE
99.94%
160th
cycle
C.
EcoEnergy,
Год журнала:
2023,
Номер
1(2), С. 448 - 459
Опубликована: Дек. 1, 2023
Abstract
Cobalt–nickel
layered
double
hydroxides
(CoNi‐LDHs)
have
been
extensively
synthesized
through
precipitation
methods
for
their
application
in
supercapacitors
(SC).
However,
the
influence
of
precipitant
quantity
on
both
morphology
evolution
and
SC
performance
has
an
underexplored
area.
This
study
systematically
examines
morphological
changes
CoNi‐LDHs
by
varying
alkaline
evaluates
asymmetric
SC.
The
findings
reveal
a
progressive
transformation
with
increase
content,
starting
from
nanorod
(Co
1
Ni
2
(OH)
‐1HMA),
progressing
to
nanorod/nansosheet
composite
‐4HMA),
ultimately
evolving
into
nanosheet
‐8HMA).
is
attributed
synergetic
effect
variable
cobalt,
which
provides
multiple
valences
induces
evolution.
resulting
LDHs
demonstrate
different
performances:
(1)
Co
‐1HMA
exhibits
maximum
capacitance
1764
F/g,
while
‐4HMA
‐8HMA
show
values
1460
F/g
1676
respectively;
(2)
rate
capabilities
showcase
percentages
60.5%
‐1HMA,
83.1%
‐4HMA,
66.3%
‐8HMA;
(3)
energy
densities
are
recorded
at
72.1
Wh/kg
41.3
62.8
Co1Ni
‐8HMA.
Particularly,
superlong
cycling
stability,
retaining
approximately
99%
after
25000
consecutive
charge/discharge
cycles
7.0
A/g.
result
underscores
its
significant
potential
efficient
storage
applications.
Lithium-sulfur
(Li-S)
batteries
are
promising
alternatives
of
conventional
Li-ion
attributed
to
their
remarkable
energy
densities
and
high
sustainability.
However,
the
practical
applications
Li-S
hindered
by
shuttling
effect
lithium
polysulfides
(LiPSs)
on
cathode
Li
dendrite
formation
anode,
which
together
leads
inferior
rate
capability
cycling
stability.
Here,
an
advanced
N-doped
carbon
microreactors
embedded
with
abundant
Co
Chinese Journal of Chemistry,
Год журнала:
2023,
Номер
41(15), С. 1861 - 1874
Опубликована: Фев. 9, 2023
Comprehensive
Summary
This
work
systematically
reviews
recent
progresses
in
the
applications
of
MOF‐derived
materials
modified
3D
porous
conductive
framework
as
hosts
for
uniform
lithium
deposition
LMBs.
A
series
commonly
used
lithiophilic
and
several
kinds
representative
MOF‐derivation‐modified
metal
anode
(LMA)
are
presented.
Finally,
challenges
future
development
employing
to
modify
LMA
included.
Advanced Energy Materials,
Год журнала:
2022,
Номер
12(36)
Опубликована: Июль 22, 2022
Abstract
Wadsley–Roth
phased
niobates
are
promising
anode
materials
for
lithium‐ion
batteries,
while
their
inherently
low
electrical
conductivity
still
limits
rate‐capability.
Herein,
a
novel
doped
Mo
1.5
W
Nb
14
O
44
(MWNO)
material
is
facilely
prepared
via
an
ionothermal‐synthesis‐assisted
doping
strategy.
The
detailed
crystal
structure
of
MWNO
characterized
by
neutron
powder
diffraction
and
aberration
corrected
scanning
transmission
electron
microscope,
unveiling
the
full
occupation
6+
‐dopant
at
t
1
tetrahedral
site.
In
half‐cells,
exhibits
enhanced
fast‐rechargeability.
origin
improved
performance
investigated
ultraviolet–visible
diffuse
reflectance
spectroscopy,
density
functional
theory
(DFT)
computation,
electrochemical
impedance
revealing
that
bandgap
narrowing
improves
MWNO.
Furthermore,
operando
X‐ray
elucidates
typical
solid‐solution
phase
conversion‐based
insertion/extraction
mechanism
with
reversible
structural
evolution
during
reaction.
boosted
diffusivity
MWNO,
due
to
/W
effect,
confirmed
galvanostatic
intermittent
titration
technique
DFT.
With
simultaneously
diffusivity,
successfully
demonstrates
its
fast‐rechargeability
practicality
in
LiNi
0.5
Mn
4
‐coupled
full‐cells.
Therefore,
this
work
illustrates
potential
ionothermal
synthesis
energy
storage
provides
mechanistic
understanding
effect
on
improving
material's
performance.