Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 2, 2024
Abstract
Organic
bipolar
electrodes
can
undergo
both
n‐type
and
p‐type
reactions
for
energy
storage
due
to
numerous
active
sites,
which
usually
deliver
a
high
theoretical
specific
capacity.
Herein,
new
polymer
cathode
material
PQPZ
is
designed
synthesized.
The
electron‐donating
phenazine
group
undergoes
two‐electron
redox
reaction
store
anions,
the
electron‐withdrawing
phenanthraquinone
sodium‐ions
through
reaction.
Notably,
as
sodium‐ion
batteries,
exhibits
reversible
capacity
of
up
270
mAh
g
−1
in
voltage
range
1.0–4.0
V
(vs.
Na
+
/Na)
achieves
density
696
Wh
kg
half‐cell.
A
retention
rate
90%
obtained
after
300
cycles
at
current
0.5C.
More
excitingly,
even
being
cycled
10000
10C,
electrode
shows
an
average
decay
low
0.0036%
per
cycle,
manifesting
very
stable
cycling
performance.
In
addition,
also
excellent
performances
when
tested
−10
°C,
making
it
promising
practical
applications.
Considering
character
PQPZ,
symmetric
batteries
are
successfully
constructed,
fulfilling
“ready‐to‐charge”
property
without
pre‐activation
process.
results
reveal
potential
application
use.
ACS Applied Energy Materials,
Journal Year:
2024,
Volume and Issue:
7(9), P. 3523 - 3539
Published: April 15, 2024
Energy
storage
devices
have
become
indispensable
for
smart
and
clean
energy
systems.
During
the
past
three
decades,
lithium-ion
battery
technologies
grown
tremendously
been
exploited
best
system
in
portable
electronics
as
well
electric
vehicles.
However,
extensive
use
limited
abundance
of
lithium
made
researchers
explore
sodium-ion
batteries
(SIBs)
an
alternative
to
lithium.
Throughout
few
years,
rapid
progression
has
represented
a
noteworthy
advancement
field
technologies.
This
review
discusses
recent
advancements
SIBs,
focusing
on
methodologies
improve
performance
cathode
anode
materials,
evolution
electrolytes
toward
solvent-free
electrolytes,
fast-charging
low-temperature
SIBs.
work
also
highlights
some
that
empowered
electrochemical
five
years.
It
concludes
emerging
routes
enhance
overall
batteries,
leading
comparable
with
Li-ion
future
research.
Energy storage materials,
Journal Year:
2024,
Volume and Issue:
67, P. 103334 - 103334
Published: March 1, 2024
Alloy-based
Sn
anode
for
sodium-ion
batteries
has
attracted
tremendous
attention
due
to
its
low
working
voltage,
high
specific
capacity,
and
good
availability.
Its
application
is
hindered,
however,
by
inferior
cycling
stability
huge
volume
changes
unstable
solid-electrolyte
interphase
(SEI)
film.
Herein,
tetraphenylphosphonium
bis(trifluoromethanesulfonyl)imide
(TPPTFSI)
introduced
into
the
electrode
spontaneously
adsorbed
on
surfaces
of
commercial
microparticles
(μ-Sn)
improve
electrochemical
performance
anode.
In
first
cycle,
TPP+
component
TPPTFSI
decomposes
form
an
organic
SEI
film,
thereby
enhancing
flexibility.
Meanwhile,
TFSI−
converted
inorganic
constituent
SEI,
improving
robustness
ionic
conductivity.
Therefore,
μ-Sn
enhanced
significantly.
The
modified
electrode,
TPPTFSI-Sn,
delivers
a
capacity
619.7
mAh
g−1
after
2000
cycles
at
2.0
A
g−1,
while
control
sample
can
only
survive
30
cycles.
Importantly,
full
cell
also
exhibits
excellent
performance,
including
rate
stability.
simple
operation
remarkable
improvement
indicate
promising
prospects
this
strategy
advanced
electrodes
in
SIBs.
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 31, 2024
Abstract
Both
high
operation
voltage
and
theoretical
capacity
promise
polyanion‐type
fluorophosphate
Na
3
V
2
(PO
4
)
O
F
as
a
competitive
cathode
toward
high‐energy‐density
sodium‐ion
batteries
(SIBs).
However,
the
intrinsic
low
kinetic
characteristics
seriously
influence
its
high‐power
property
service
life.
To
well
address
this,
creative
tiny
high‐entropy
(HE)
doping
methodology
is
purposefully
developed
to
fabricate
nanoscale
1.94
(Cr,
Mn,
Co,
Ni,
Cu)
0.06
(NVPOF‐HE)
advanced
materials
for
SIBs.
The
grain
refinement
effect
induced
by
collaborative
regulations
from
polyvinyl
pyrrolidone
HE
heteroatomic
reasonably
proposed
nanosizing
particle
dimension
of
NVPOF‐HE.
Systematic
experiments
calculations
authenticate
that
efficiently
promotes
electronic/ionic
transport
high‐voltage
contribution,
weakens
lattice
expansion
over
+
‐(de)intercalation
processes.
Thanks
appealing
virtues
mentioned
here,
nano
NVPOF‐HE,
compared
single‐ion/dual‐ion/triple‐ion
doped
cases,
achieves
even
better
‐storage
performance
in
terms
both
high‐rate
capacities
long‐term
cycling
stability.
Furthermore,
NVPOF‐HE
assembled
full
SIBs
deliver
materials‐level
energy
density
463
Wh
kg
−1
electrochemical
stability
≈93.8%
retention
after
1000
cycles
at
5
C
rate.
More
essentially,
fundamental
insights
gained
here
provide
significant
scientific
technological
advancement
high‐performance
durable
polyanionic
cathodes
next‐generation
Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(28)
Published: May 2, 2024
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.
