Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 9, 2024
Abstract
Conversion‐type
electrode
materials
have
gained
massive
research
attention
in
sodium‐ion
batteries
(SIBs),
but
their
limited
reversibility
hampers
practical
use.
Herein,
we
report
a
bifunctional
nanoreactor
to
boost
highly
reversible
storage,
wherein
record‐high
degree
of
85.65
%
is
achieved
for
MoS
2
anodes.
Composed
nitrogen‐doped
carbon‐supported
single
atom
Mn
(NC‐SAMn),
this
concurrently
confines
active
spatially
and
catalyzes
reaction
kinetics.
In
situ/ex
situ
characterizations
including
spectroscopy,
microscopy,
electrochemistry,
combined
with
theoretical
simulations
containing
density
functional
theory
molecular
dynamics,
confirm
that
the
NC‐SAMn
nanoreactors
facilitate
electron/ion
transfer,
promote
distribution
interconnection
discharging
products
(Na
S/Mo),
reduce
Na
S
decomposition
barrier.
As
result,
nanoreactor‐promoted
anodes
exhibit
ultra‐stable
cycling
capacity
retention
99.86
after
200
cycles
full
cell.
This
work
demonstrates
superiority
two‐dimensional
confined
catalytic
effects,
providing
feasible
approach
improve
wide
range
conversion‐type
materials,
thereby
enhancing
application
potential
long‐cycled
SIBs.
Angewandte Chemie,
Год журнала:
2024,
Номер
136(43)
Опубликована: Июль 9, 2024
Abstract
Conversion‐type
electrode
materials
have
gained
massive
research
attention
in
sodium‐ion
batteries
(SIBs),
but
their
limited
reversibility
hampers
practical
use.
Herein,
we
report
a
bifunctional
nanoreactor
to
boost
highly
reversible
storage,
wherein
record‐high
degree
of
85.65
%
is
achieved
for
MoS
2
anodes.
Composed
nitrogen‐doped
carbon‐supported
single
atom
Mn
(NC‐SAMn),
this
concurrently
confines
active
spatially
and
catalyzes
reaction
kinetics.
In
situ/ex
situ
characterizations
including
spectroscopy,
microscopy,
electrochemistry,
combined
with
theoretical
simulations
containing
density
functional
theory
molecular
dynamics,
confirm
that
the
NC‐SAMn
nanoreactors
facilitate
electron/ion
transfer,
promote
distribution
interconnection
discharging
products
(Na
S/Mo),
reduce
Na
S
decomposition
barrier.
As
result,
nanoreactor‐promoted
anodes
exhibit
ultra‐stable
cycling
capacity
retention
99.86
after
200
cycles
full
cell.
This
work
demonstrates
superiority
two‐dimensional
confined
catalytic
effects,
providing
feasible
approach
improve
wide
range
conversion‐type
materials,
thereby
enhancing
application
potential
long‐cycled
SIBs.
Angewandte Chemie,
Год журнала:
2024,
Номер
136(21)
Опубликована: Март 16, 2024
Abstract
Diluents
have
been
extensively
employed
to
overcome
the
disadvantages
of
high
viscosity
and
sluggish
kinetics
high‐concentration
electrolytes,
but
generally
do
not
change
pristine
solvation
structure.
Herein,
a
weakly
coordinating
diluent,
hexafluoroisopropyl
methyl
ether
(HFME),
is
applied
regulate
coordination
Na
+
with
diglyme
anion
form
diluent‐participated
solvate.
This
unique
structure
promotes
accelerated
decomposition
anions
diluents,
construction
robust
inorganic‐rich
electrode‐electrolyte
interphases.
In
addition,
introduction
HFME
reduces
desolvation
energy
,
improves
ionic
conductivity,
strengthens
antioxidant,
enhances
safety
electrolyte.
As
result,
assembled
Na||Na
symmetric
cell
achieves
stable
cycle
over
1800
h.
The
Na||P’2‐Na
0.67
MnO
2
delivers
capacity
retention
87.3
%
average
Coulombic
efficiency
99.7
after
350
cycles.
work
provides
valuable
insights
into
chemistry
for
advanced
electrolyte
engineering.
Carbon Neutralization,
Год журнала:
2024,
Номер
3(6), С. 1036 - 1091
Опубликована: Окт. 21, 2024
Abstract
Titanium
niobium
oxide
(TiNb
x
O
2
+
2.5
)
is
emerging
as
a
promising
electrode
material
for
rechargeable
lithium‐ion
batteries
(LIBs)
due
to
its
exceptional
safety
characteristics,
high
electrochemical
properties
(e.g.,
cycling
stability
and
rate
performance),
eco‐friendliness.
However,
several
intrinsic
critical
drawbacks,
such
relatively
low
electrical
conductivity,
significantly
hinder
practical
applications.
Developing
reliable
strategies
crucial
accelerating
the
use
of
TiNb
‐based
materials
in
LIBs,
especially
high‐power
LIBs.
Here,
we
provide
chronicle
review
research
progress
on
anodes
from
early
1950s
present,
which
classified
into
stage
(before
2008),
(2008–2012),
explosive
(2013–2017),
commercialization
(2018),
steady
development
(2018–2022),
new
breakthrough
(since
2022).
In
each
stage,
advancements
fundamental
science
application
are
reviewed,
corresponding
developing
trends
summarized.
Moreover,
future
directions
propel
suggested
based
reviewing
history.
This
expected
pave
way
fabrication
high‐performance
Nano-Micro Letters,
Год журнала:
2025,
Номер
17(1)
Опубликована: Янв. 28, 2025
Abstract
All-solid-state
batteries
(ASSBs)
are
pursued
due
to
their
potential
for
better
safety
and
high
energy
density.
However,
the
density
of
cathode
ASSBs
does
not
seem
be
satisfactory
low
utilization
active
materials
(AMs)
at
loading.
With
small
amount
solid
electrolyte
(SE)
powder
in
cathode,
poor
electrochemical
performance
is
often
observed
contact
loss
non-homogeneous
distribution
AMs
SEs,
leading
tortuosity
limitation
lithium
electron
transport
pathways.
Here,
we
propose
a
novel
design
that
can
achieve
volumetric
1258
Wh
L
−1
AM
content
85
wt%
by
synergizing
merits
AM@SE
core–shell
composite
particles
with
conformally
coated
thin
SE
shell
prepared
from
mechanofusion
process
particles.
The
structure
an
intimate
guarantees
ionic
conduction
pathway
while
unharming
electronic
conduction.
In
addition,
play
role
filler
reduces
packing
porosity
electrode
as
well
between
separator
layer.
systematic
demonstration
optimization
may
provide
understanding
guidance
on
electrodes
density,
capacity,
ultimately
