Carbon Neutralization,
Год журнала:
2025,
Номер
4(3)
Опубликована: Апрель 13, 2025
ABSTRACT
Sodium‐ion
batteries
have
become
a
significant
research
focus
in
academia.
As
novel
sodium
anode
material,
layered
NbOPO
4
,
consisting
of
octahedral
NbO
6
units
sharing
oxygen
atoms
with
tetrahedral
PO₄
units,
exhibits
stability
due
to
strong
phosphorus‐oxygen
covalent
bonds
that
prevent
loss
from
the
framework.
However,
its
inherently
low
electrical
conductivity
and
sluggish
charge
transfer
kinetics
limit
electrochemical
performance.
To
address
these
challenges,
we
designed
synthesized
vanadium‐doped
niobium
oxyphosphate
coated
reduced
graphene
oxide
(V‐NbOPO
@rGO)
via
microwave
hydrothermal
method
followed
by
calcination.
Vanadium
doping
effectively
modulated
electronic
structure
significantly
enhanced
conductivity,
as
corroborated
density
functional
theory
(DFT)
calculations.
Consequently,
V
0.15
‐NbOPO
@rGO
electrode
demonstrated
exceptional
rate
capability,
achieving
418
mAh
g
−1
at
current
0.1
A
maintaining
reversible
capacity
exceeding
100
even
an
ultrahigh
50
.
Furthermore,
storage
mechanism
was
validated
through
in‐situ
XRD,
TEM,
XPS
analyses.
This
study
provides
effective
strategy
for
improving
performance
based
anodes
deepens
understanding
V‐doped
emphasizing
potential
practical
application
sodium‐ion
batteries.
Chemical Engineering Journal,
Год журнала:
2024,
Номер
489, С. 151346 - 151346
Опубликована: Апрель 16, 2024
Sodium-ion
batteries
(SIBs)
have
emerged
as
a
promising
contender
in
power
systems
owing
to
their
cost-effectiveness
and
safety
advantages.
However,
alloy-type
anode
materials,
crucial
for
SIB
performance,
often
face
challenges
such
significant
volume
expansion
rapid
capacity
decay
at
high
current
densities.
In
this
study,
an
ion-exchange
strategy
is
used
fabricate
ultra-thin
porous
BiOCl
nanosheets
(UTP
NS)
material
SIB.
Remarkably,
lamellar
UTP
NSs
can
transform
flower-like
shape
ether
electrolytes.
This
structural
change
beneficial
shortening
the
Na+
transport
path,
which
facilitates
electrolyte
entry
enhances
dynamic
behavior
of
SIBs.
Electrochemically,
NS
demonstrates
exceptional
212.4
mAh/g
service
stability
up
3000
cycles
density
5
A/g,
showcasing
durability
application
potential.
Furthermore,
full-cell,
coupled
with
Na3V2(PO4)3
cathode
anode,
enables
outstanding
sodium
storage
140.5
powers
3
W
bulb.
research
provides
strategic
approach
identifying
suitable
anodes
aims
inspire
researchers
focus
on
advancing
materials
Abstract
Sodium
ion
batteries
(SIBs)
are
considered
as
the
ideal
candidates
for
next
generation
of
electrochemical
energy
storage
devices.
The
major
challenges
anode
lie
in
poor
cycling
stability
and
sluggish
kinetics
attributed
to
inherent
large
Na
+
size.
In
this
work,
Bi
nanosphere
encapsulated
N‐doped
carbon
nanowires
(Bi@N‐C)
is
assembled
by
facile
electrospinning
carbonization.
mitigates
structure
stress/strain
during
alloying/dealloying,
optimizes
ionic/electronic
diffusion,
provides
fast
electron
transfer
structural
stability.
Due
excellent
structure,
Bi@N‐C
shows
performance
SIBs
terms
good
rate
capacity
half
cells
full
cells.
fundamental
mechanism
outstanding
has
been
demonstrated
through
synchrotron
in‐situ
XRD,
atomic
force
microscopy,
ex‐situ
scanning
microscopy
(SEM)
density
functional
theory
(DFT)
calculation.
Importantly,
a
deeper
understanding
underlying
reasons
improvement
elucidated,
which
vital
providing
theoretical
basis
application
SIBs.
Abstract
The
growing
global
energy
demands,
coupled
with
the
imperative
for
sustainable
environmental
challenges,
have
sparked
significant
interest
in
electrochemical
storage
and
conversion
(EESC)
technologies.
Metal‐free
heteroatom‐doped
carbon
materials,
especially
those
codoped
nitrogen
(N)
sulfur
(S),
gained
prominence
due
to
their
exceptional
conductivity,
large
specific
surface
area,
remarkable
chemical
stability,
enhanced
performance.
strategic
incorporation
of
N
S
atoms
into
framework
plays
a
pivotal
role
modulating
electron
distribution
creating
catalytically
active
sites,
thereby
significantly
enhancing
EESC
This
review
examines
key
synthetic
strategies
fabricating
N,
materials
(NSDCMs)
provides
comprehensive
overview
recent
advancements
NSDCMs
applications.
These
encompass
various
systems
such
as
supercapacitors,
alkali‐ion
batteries,
lithium–sulfur
batteries.
Energy
processes,
including
hydrogen
evolution,
oxygen
reduction/evolution,
dioxide
reduction
are
also
covered.
Finally,
future
research
directions
discussed
field,
aiming
highlight
promising
potential
multifunctional
capabilities
driving
further
systems.
