Batteries & Supercaps,
Journal Year:
2023,
Volume and Issue:
7(2)
Published: Nov. 23, 2023
Abstract
Redox‐active
polymers
(RAPs)
are
promising
organic
electrode
materials
for
affordable
and
sustainable
batteries
due
to
their
flexible
chemical
structures
negligible
solubility
in
the
electrolyte.
Developing
high‐dimensional
RAPs
with
porous
crosslinkers
can
further
improve
stability
redox
capability
by
reducing
enhancing
reaction
kinetics.
This
work
reports
two
three‐dimensional
(3D)
as
stable
cathodes
Na‐ion
(NIBs)
K‐ion
(KIBs).
Carbonyl
functional
groups
incorporated
into
repeating
units
of
polycondensation
Tetrakis(4‐aminophenyl)methane
different
dianhydrides.
The
interconnected
3D
extended
conjugation
undergo
multi‐electron
reactions
exhibit
high
performance
both
NIBs
KIBs
terms
long
cycle
life
(up
8000
cycles)
fast
charging
2
A
g
−1
).
results
demonstrate
that
developing
is
an
effective
strategy
achieve
high‐performance,
affordable,
KIBs.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(6), P. 7119 - 7129
Published: Jan. 31, 2024
Manganese-based
layered
oxides
are
considered
promising
cathodes
for
sodium
ion
batteries
due
to
their
high
capacity
and
low-cost
manganese
resources.
Triggering
the
anionic
redox
reaction
(ARR)
can
exceed
limitation
determined
by
conventional
cationic
redox.
However,
unstable
ARR
charge
compensation
Jahn–Teller
distortion
of
Mn3+
ions
readily
result
in
structural
degradation
rapid
fade.
Here,
we
report
a
P2-type
Na0.8Li0.2Mn0.7Cu0.1O2
cathode
that
shows
retention
84.5%
at
200
mA/g
after
cycles.
Combining
situ
X-ray
diffraction
multi
other
ex
characterizations,
reveal
enhanced
cycling
stability
is
ascribed
slow
release
activity
which
well
suppress
favor
reversibility.
Furthermore,
density-functional
theory
calculations
demonstrate
inhibited
interlayer
migration
reduced
band
gap
facilitate
kinetic
behavior
ARR.
These
findings
provide
perspective
designing
high-energy-density
materials
with
activity.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 27, 2025
Abstract
NbO‐based
anodes
for
Li‐ion
batteries,
such
as
Nb
2
O
5
,
are
promising
due
to
their
minimal
volume
change
and
relatively
high
operation
voltage,
leading
extended
cycling
stability
reduced
risk
of
Li‐dendrite
formation.
However,
limited
reversible
capacity
hinders
further
development.
Herein,
FeNbO
4
porous
nanofibers
(PNFs)
fabricated.
These
consist
nanoparticles
numerous
voids
left
electrolyte
infiltration.
When
cycled
within
an
optimized
voltage
window
(0.50–3.00
V),
the
PNF
electrode
exhibits
hysteresis
improved
energy
efficiency
compared
conventional
wide‐range
(0.01–3.00
V).
Moreover,
it
a
lower
activation
substantially
higher
diffusion
coefficient,
resulting
in
twice
that
anode.
Ex
situ
characterizations
on
intermediates
suggest
LiFeO
x
LiNbO
composites
form
during
first
lithiation
process
via
conversion
reaction,
after
which
insertion‐extraction
reaction
dominates
storage
behavior.
The
enhanced
is
attributed
redox
activity
Fe
3+
/Fe
2+
5+
/Nb
4+
while
operating
voltages
contribute
safety
PNFs
anode
material.
This
work
provides
refined
understanding
offers
fresh
perspectives
design
with
improved‐capacity.
Energy Material Advances,
Journal Year:
2024,
Volume and Issue:
5
Published: Jan. 1, 2024
Developing
facile
and
economical
strategies
to
fabricate
nitrogen-doped
porous
carbon
anode
is
desirable
for
dual-carbon
potassium
ion
hybrid
capacitors
(PIHCs).
Here,
a
high-concentration
edge-nitrogen-doped
(NPC)
synthesized
by
template-free
strategy,
in
which
the
total
content
of
pyrrolic
nitrogen
pyridinic
accounts
more
than
80%
atoms.
As
result,
NPC
displays
capacity
315.4
mA
h
g
−1
at
current
rate
0.1
A
189.1
5
.
Ex
situ
characterizations
density
functional
theory
calculations
demonstrate
edge-nitrogen
doping
enhances
K
+
adsorption
electronic
conductivity
materials,
resulting
good
electrochemical
performance.
The
assembled
NPC//CMK-3
PIHC
delivers
an
energy
71.1
W
kg
power
771.9
over
8,000
cycles.
The Journal of Physical Chemistry Letters,
Journal Year:
2024,
Volume and Issue:
15(17), P. 4669 - 4678
Published: April 23, 2024
The
Zn
dendrite
and
hydrogen
evolution
reaction
have
been
a
"stubborn
illness"
for
the
life
span
of
zinc
anodes,
which
significantly
hinders
development
aqueous
batteries
(AZBs).
Herein,
considering
ingenious
molecular
structure,
multifunctional
additive
based
on
synergistic
regulation
cations
anions
at
interface
is
designed
to
promote
dendrite-free
stable
anode.
Theoretical
calculations
characterization
results
verified
that
electrostatic
shield
effect
cation,
solvation
sheath
bilayer
structural
solid
electrolyte
film
(SEI)
jointly
account
uniform
deposition
side
suppression.
Ultimately,
remarkably
high
average
Coulombic
efficiency
(CE)
99.4%
achieved
in
Zn||Cu
cell
300
cycles,
steady
charge/discharge
cycling
over
3000
h
1.0
mA
cm
