Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 30, 2025
Abstract
This
study
develops
a
new
type
of
fluorinated
covalent
organic
nanosheets
(CONs)
as
anode
materials
for
sodium‐ion
batteries
by
incorporating
an
electron‐withdrawing
benzothiadiazole
(BT)
unit
and
F
atom
into
the
framework.
These
modifications
lead
to
reduced
bandgap
electron
density,
generating
strong
permanent
dipoles
that
increased
Na
+
accessible
sites
within
self‐assembled
solid‐state
structure.
To
elucidate
effect
these
electronic
changes,
storage
performance
D/A‐CON‐10‐F
is
compared
nonfluorinated
D/A‐CON‐10.
The
density
in
weakens
its
interaction
with
,
yet
enhances
ion
charge
carrier
conductivities,
leading
improved
electrochemical
performance.
Notably,
exhibits
reversible
discharge
capacity
≈637
mA
h
g
−1
at
100
maintaining
structural
stability
over
5000
cycles
excellent
rate
capability.
results
demonstrate
dipole
engineering
CONs
effectively
transport
long‐term
stability,
offering
promising
strategy
next‐generation
battery
anodes.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 5, 2024
Abstract
Hard
carbon
(HC)
has
been
widely
regarded
as
the
most
promising
anode
material
for
sodium‐ion
batteries
(SIBs)
due
to
its
decent
capacity
and
low
cost.
However,
poor
initial
Coulombic
efficiency
(ICE)
of
HC
seriously
hinders
practical
application
in
SIBs.
Herein,
pyridinic
N‐doped
hard
polyhedra
with
easily
accessible
carbonyl
groups
situ
coupled
nanotubes
are
rationally
synthesized
via
a
facile
pretreated
zeolitic
imidazolate
framework
(ZIFs)‐carbonization
strategy.
The
comprehensive
ex/in
techniques
combined
theoretical
calculations
reveal
that
synergy
pyridinic‐N
promoted
by
pretreatment
carbonization
process
would
not
only
optimize
Na
+
adsorption
energy
but
also
accelerate
desorption
,
significantly
suppressing
irreversible
loss.
As
result,
as‐synthesized
an
can
deliver
unprecedented
high
ICE
98%
large
reversible
389.4
mAh
g
−1
at
0.03
A
.
This
work
may
provide
effective
strategy
structural
design
ICE.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 12, 2024
Abstract
Sodium‐ion
batteries
(SIBs)
with
abundant
elements
have
garnered
significant
attention
from
researches
as
a
promise
compensation
to
lithium‐ion
(LIBs).
However,
the
large‐scale
commercial
application
of
SIBs
is
partially
hindered
by
limited
initial
coulombic
efficiency
(ICE)
due
irreversible
formation
solid
electrolyte
interphase
(SEI)
and
intercalation
into
defects
in
anode.
Similar
pre‐lithiation
techniques,
pre‐sodiation
approaches
are
considered
be
one
most
direct
effective
way
compensate
for
loss
active
sodium
at
anode
side
during
cycle.
In
this
context,
additional
ions
pre‐injected
cathode/anode
material
chemical/electrochemical
methods,
aiming
improve
battery
span
life
energy
density.
This
review
delves
necessity
impact
compiling
latest
research
progress,
instance,
self‐sacrificing
cathode
additives,
over‐sodiated
materials,
contact
solution
chemical
pre‐sodiation.
Notably,
mechanisms
underlying
highlighted.
comprehensive
overview
aims
foster
deeper
understanding
techniques
expects
provide
guidance
realizing
high
density
sodium‐ion
batteries.
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 24, 2024
Abstract
Owing
to
the
abundant
reserves
and
low
cost,
sodium‐ion
batteries
(SIBs)
have
garnered
unprecedented
attention.
However,
their
widespread
adoption
is
hindered
by
scarcity
of
alternative
anodes
with
fast‐charging
capability
high
stability.
To
overcome
this
challenge,
a
SIB
anode,
N‐doped
Bi/BiOCl
embedded
in
carbon
framework
(Bi/BiOCl@NC)
fast
Na
+
transport
channel
ultra‐high
structural
stability,
developed.
During
cycling
ether
electrolyte,
Bi/BiOCl@NC
undergoes
remarkable
transformation
into
3D
porous
skeleton,
which
significantly
reduces
pathway
accommodates
volume
changes.
By
employing
density
functional
theory
calculations
simulate
storage
behavior
structure,
theoretically
characterized
barrier
(0.056
eV)
outstanding
electronic
conductivity.
Such
unique
characteristics
induce
anode
an
capacity
410
mAh·g
−1
at
20
A·g
exhibit
stability
over
2300
cycles
10
.
This
study
provides
rational
scenario
for
design
will
enlighten
more
advanced
research
promote
exploitation
SIBs.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 24, 2025
Abstract
The
trade‐off
between
initial
coulombic
efficiency
(ICE)
and
rate
performance
of
hard
carbon
anodes
remains
a
challenge
in
their
practical
applications,
which
is
highly
related
to
complex
active
surface
porous
properties.
In
this
work,
high‐performance
anode
prepared
using
xylose
as
the
source
with
Co
2+
‐assisted
catalysis,
exhibits
an
excellent
91.6%,
high
capacity
396.4
mA
h
g
−1
,
superior
(176.3
at
5
A
),
outstanding
cycling
stability.
Cobalt‐ion
treatment
forms
“expanded”
graphite
segments,
facilitating
intercalation
desolvated
sodium
ions.
Additionally,
intersection
these
segments
creates
“nanocaves”,
enabling
rapid
sodium‐ion
transport
stage.
Using
combination
atomic‐resolution
structural
characterization
three‐dimensional
electron
tomography
via
transmission
microscopy,
it
observed
that
initially
isolated
nanoporous
holes
collapsed
into
interconnected
pancake‐like
pores
during
later
cycling.
reconstructed
narrow
but
connected
pore
structure
provides
abundant
storage
sites
charge
transfer
pathways,
effectively
accommodating
stress
This
work
presents
innovative
strategy
for
designing
commercial
advanced
architectures
also
new
insight
evolution
Angewandte Chemie,
Journal Year:
2024,
Volume and Issue:
136(43)
Published: July 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 International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: July 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.
Small Methods,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 6, 2024
Biomass-based
hard
carbon
has
the
advantages
of
a
balanced
cost
and
electrochemical
performance,
making
it
most
promising
anode
material
for
sodium-ion
batteries.
However,
due
to
structural
limitations
biomass
(such
as
macropores
impurities),
still
faces
problems
low
specific
capacity
initial
Coulombic
efficiency
(ICE).
Herein,
an
integrated
strategy
liquefaction
oxidation
treatment
is
proposed
fabricate
with
ash
content
sp
