ACS Applied Materials & Interfaces,
Год журнала:
2022,
Номер
14(2), С. 2979 - 2988
Опубликована: Янв. 7, 2022
Organic
electrode
materials
have
shown
potential
for
rechargeable
batteries
because
they
are
environmentally
friendly,
earth-abundant
sources,
recyclable,
high
sustainable,
designable,
flexible,
and
lightweight.
However,
low
electrical
conductivity
dissolution
in
organic
liquid
electrolytes
hinder
their
further
development.
Herein,
MXene/organics
heterostructures
designed
to
address
the
problems
of
electrodes
via
a
scalable
simple
electrostatic
self-assembly
strategy.
Under
effect
interaction,
cathode
material,
3,4,9,10-perylenetetracarboxylic
dianhydride
(PTCDA),
is
tightly
attached
MXene
nanosheets.
Owing
electronic
special
two-dimensional
(2D)
structure
nanosheets,
issues
PTCDA
effectively
relieved.
When
applied
lithium-ion
(LIBs)
sodium-ion
(SIBs),
MXene@PTCDA
heterostructure
exhibits
significantly
enhanced
rate
capability
cycling
performance
than
bare
PTCDA.
The
proposed
here
can
be
other
(K,
Zn,
Al,
Mg,
Ca,
etc.)
battery
systems.
In
addition
energy
storage
conversion,
also
extended
many
fields
such
as
catalysis,
sensors,
electronics,
optics,
membranes,
semiconductors,
biomedicines,
etc.
ACS Nano,
Год журнала:
2021,
Номер
16(1), С. 813 - 822
Опубликована: Дек. 28, 2021
Dendrite
growth
and
low
Coulombic
efficiency
caused
by
uneven
diffusion
electrodeposition
of
Zn2+
ions
have
emerged
as
a
barrier
to
exploit
the
Zn
metal
anode.
In
this
work,
we
demonstrate
stoichiometric
halogenated
MXenes
(Ti3C2Cl2,
Ti3C2Br2,
Ti3C2I2)
an
artificial
layer
that
can
induce
uniform
deposition.
The
efficient
redistribution
effect
results
from
coherent
heterogeneous
interface
reconstruction
regulated
ion
tiling
halogen
surficial
termination.
synergetic
effects
high
lattice
matching
(90%)
between
adopted
Zn,
well
positive
regulation,
are
guided
nucleate
uniformly
on
most
extensive
(000l)
crystal
plane
MXene
matrix
grow
in
planar
manner.
terms
Cl
termination
is
found
be
more
effective
than
O/F,
Br,
I
due
its
moderate
adsorption
coefficiency
for
ions.
Ti3C2Cl2-Zn
anode
achieves
life
extension
over
12
times
(840
h
at
2
mA
cm-2//1
mAh
cm-2)
bare
serves
9000
cycles
battery
with
Ti3C2I2
cathode
rate
3
A
g-1.
Given
abundance
parameters
terminations
materials,
developed
strategy
expected
extended
other
systems.
ACS Nano,
Год журнала:
2021,
Номер
15(8), С. 12741 - 12767
Опубликована: Авг. 5, 2021
Metal
anodes
based
on
a
plating/stripping
electrochemistry
such
as
metallic
Li,
Na,
K,
Zn,
Ca,
Mg,
Fe,
and
Al
are
recognized
promising
anode
materials
for
constructing
next-generation
high-energy-density
rechargeable
metal
batteries
owing
to
their
low
electrochemical
potential,
high
theoretical
specific
capacity,
superior
electronic
conductivity,
etc.
However,
inherent
issues
chemical
reactivity,
severe
growth
of
dendrites,
huge
volume
changes,
unstable
interface
largely
impede
practical
application.
Covalent
organic
frameworks
(COFs)
derivatives
emerging
multifunctional
have
already
well
addressed
the
in
past
several
years
due
abundant
metallophilic
functional
groups,
special
inner
channels,
controllable
structures.
COFs
can
solve
by
interfacial
modification,
homogenizing
ion
flux,
acting
nucleation
seeds,
reducing
corrosion
anodes,
so
on.
Nevertheless,
related
reviews
still
absent.
Here
we
present
detailed
review
batteries.
Meanwhile,
some
outlooks
opinions
put
forward.
We
believe
catch
eyes
relevant
researchers
supply
inspiration
future
research.
ACS Nano,
Год журнала:
2022,
Номер
16(5), С. 7772 - 7782
Опубликована: Апрель 19, 2022
Although
transitional
metal
dichalcogenides
have
been
regarded
as
appealing
electrodes
for
sodium/potassium-ion
batteries
(SIBs/PIBs)
owing
to
their
high
theoretical
capacity,
it
is
a
key
challenge
realize
dichalcogenide
anodes
with
long-period
cycling
performance
and
high-rate
capability
because
of
poor
conductivity
large
volumetric
change.
Herein,
polypyrrole-encapsulated
VSe2
nanoplates
(VSe2@PPy)
were
prepared
by
the
selenization
VOOH
hollow
nanospheres
subsequent
in
situ
polymerization
coating
pyrrole.
Benefiting
from
inherent
metallicity
VSe2,
improvement
structural
protection
provided
PPy
layer,
VSe2@PPy
exhibited
enhanced
sodium/potassium-storage
performances,
delivering
superior
rate
capacity
260.0
mA
h
g-1
at
10
A
SIBs
148.6
5
PIBs,
well
revealing
an
ultrastability
324.6
after
2800
cycles
4
SIBs.
Moreover,
insertion
conversion
mechanisms
intermediates
Na0.6VSe2,
NaVSe2,
VSe
elucidated
situ/ex
X-ray
diffraction
combined
ex
transmission
electron
microscopy
observation
potentio-electrochemical
impedance
spectroscopy
during
sodiation
desodiation
processes.
Density
functional
theory
calculations
show
that
strong
coupling
between
not
only
causes
stronger
total
density
states
built-in
electric
field,
leading
increased
electrical
conductivity,
but
also
effectively
decreases
ion
diffusion
barrier.
Advanced Energy Materials,
Год журнала:
2022,
Номер
12(18)
Опубликована: Март 18, 2022
Abstract
Lithium
(Li)
metal
is
considered
as
one
of
the
best
anode
materials
due
to
its
high
theoretical
capacity
and
low
reduction
potential.
However,
practical
application
restricted
by
uneven
Li
dendrite
growth.
Herein,
vertically
aligned
Ti
3
C
2
T
x
MXene
nanosheet
arrays
synthesized
a
facile
ice
template
assisted
blade
coating
method
are
adopted
regulate
nucleation
guide
deposition.
This
kind
vertical
structure
exhibits
tortuosity
that
can
achieve
homogeneous
fast
transport.
In
addition,
rich
F
O
groups
on
surface
conducive
formation
uniform
solid–electrolyte
interphase
layer,
which
plays
an
important
role
in
regulating
growth
metal.
Consequently,
electrodes
Coulombic
efficiencies
(98.8%)
for
more
than
450
cycles
at
fixed
areal
1.0
mAh
cm
−2
with
current
density
mA
.
Moreover,
it
maintain
stable
lithium
plating/striping
behaviors
even
ultrahigh
5.0
Furthermore,
full
batteries
(LiFePO
4
cathode)
paired
these
show
superior
stability
rate
performance
horizontally
electrodes.
Nano-Micro Letters,
Год журнала:
2023,
Номер
15(1)
Опубликована: Март 15, 2023
Abstract
Since
the
discovery
in
2011,
MXenes
have
become
rising
star
field
of
two-dimensional
materials.
Benefiting
from
metallic-level
conductivity,
large
and
adjustable
gallery
spacing,
low
ion
diffusion
barrier,
rich
surface
chemistry,
superior
mechanical
strength,
exhibit
great
application
prospects
energy
storage
conversion,
sensors,
optoelectronics,
electromagnetic
interference
shielding
biomedicine.
Nevertheless,
two
issues
seriously
deteriorate
further
development
MXenes.
One
is
high
experimental
risk
common
preparation
methods
such
as
HF
etching,
other
difficulty
obtaining
with
controllable
groups.
Recently,
Lewis
acidic
a
brand-new
strategy
for
MXenes,
has
attracted
intensive
attention
due
to
its
safety
ability
endow
uniform
terminations.
However,
comprehensive
review
etching
method
not
been
reported
yet.
Herein,
we
first
introduce
following
four
aspects:
mechanism,
terminations
regulation,
in-situ
formed
metals
delamination
multi-layered
Further,
applications
MXene-based
hybrids
obtained
by
route
sensors
microwave
absorption
are
carefully
summarized.
Finally,
some
challenges
opportunities
also
presented.
