Micro & Nano Letters,
Год журнала:
2024,
Номер
19(1)
Опубликована: Янв. 1, 2024
Abstract
Here,
the
authors
report
a
practical
method
for
preparing
nitrogen‐doped
carbon
materials
using
an
orthogonal
array
design.
The
material
with
highest
specific
capacitance
value
of
262
F·g
−1
at
current
density
1
A·g
was
obtained
under
conditions
(KOH
as
activation
agent,
temperature
600°C,
time
3
h,
respectively).
Its
high
electrochemical
properties
are
attributed
to
its
surface
area
and
additional
pseudo‐capacitance.
After
5000
cycles,
remained
92.8%,
good
cycle
stability.
Textural
characterization
performed
N
2
adsorption/desorption
scanning
electron
microscopy.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
12(6), С. 2455 - 2464
Опубликована: Янв. 31, 2024
The
ammonium-ion
supercapacitor
(AISC)
with
nonmetal
charge
carriers
exhibits
merits
of
element
abundance
and
compatibility
aqueous
electrolytes.
However,
it
still
suffers
from
severe
performance
degradation
at
low
temperatures.
Herein,
a
novel
deep
eutectic
solvent
(DES)
containing
H2O,
ethylene
glycol,
(NH4)2SO4
is
designed
shows
freezing
point
−46.3
°C.
DES
further
incorporated
in
poly(vinyl
alcohol)/gelatin
gels
to
prepare
eutectogel
that
demonstrates
favorable
mechanical
flexibility
high
ionic
conductivity
45.6
mS
cm–1
room
temperature.
Furthermore,
the
also
an
excellent
self-extinguishing
property.
AISC
consisting
optimized
carbon
electrodes
indicates
remarkable
cycling
stability
∼100%
capacitance
retention
Coulombic
efficiency
after
30
000
charge–discharge
cycles.
Moreover,
flexible
electrochemical
under
harsh
conditions,
such
as
bending
deformation,
damaged
state,
low-temperature
environments.
Therefore,
this
work
provides
innovative
promising
platform
for
next-generation
energy
storage
systems.
ACS Applied Energy Materials,
Год журнала:
2025,
Номер
8(1), С. 376 - 387
Опубликована: Янв. 3, 2025
Ammonium
ion
storage
is
poised
to
revolutionize
energy
because
of
its
affordability,
safety,
abundance
elements,
and
eco-friendliness.
However,
the
potential
NH4+
has
been
elusive
as
a
result
difficulties
in
host
materials
development.
For
first
time,
we
have
explored
capabilities
nanocomposite
made
ammonium
vanadium
oxide
(NVO)
porous
activated
carbon
(PAC).
This
NVO–PAC
boasts
specific
capacitance
527
mF
cm–2,
surpassing
367
cm–2
value
NVO
alone
at
constant
current
density
2
mA
cm–2.
The
PAC
combination
significantly
increases
surface
area,
contributing
nanocomposite's
enhanced
capacitance.
synergistic
mechanisms
deintercalation/intercalation
adsorption
ions
on
further
amplify
Moreover,
fabricated
symmetric
cell
using
NVO–PAC,
delivering
an
outstanding
95
mWh
power
2400
mW
exceptional
cycling
stability,
retaining
100%
original
even
after
104
cycles
with
97%
Coulombic
efficiency.
Frontiers in Energy Research,
Год журнала:
2025,
Номер
12
Опубликована: Янв. 3, 2025
Fast
and
facile
synthesis
of
nanomaterials
is
always
a
challenge
for
industrial
applications
in
various
sectors.
In
this
work,
CdMoO₄
CdWO₄
nanoparticles
are
synthesized
by
using
fast
cost-effective
microwave-assisted
method.
The
mixed
with
reduced
graphene
oxide
(rGO),
to
form
active
electrode
materials
supercapacitor
their
electrochemical
performances
were
studied
detail.
electrodes
prepared
simple
mixtures
rGO/CdMoO₄
rGO/CdWO₄,
performance
measured
both,
two-
three-electrode
configurations.
general,
both
rGO/CdWO₄
exhibit
an
increased
specific
capacitance
(Cp)
compared
pure
rGO.
Notably,
the
mixture
shows
Cp
exceeding
543
Fg⁻
1
at
scan
rate
5
mVs⁻
,
which
represents
significant
improvement
over
rGO
alone
(Cp
=
225
).
This
increase
can
be
attributed
higher
surface
area
material
due
smaller
size
intercalation
between
layers
comparison
material.
Furthermore,
demonstrated
77%
retention
5,000
charge/discharge
cycles
two-electrode
configuration.
promising
rapid,
low-cost
suggest
that
these
have
great
potential
further
use
high
efficiency
energy-storage
devices.
Proceedings of the National Academy of Sciences,
Год журнала:
2025,
Номер
122(8)
Опубликована: Фев. 18, 2025
In
aqueous
ammonium-ion
storage,
hydrogen
bonds
play
a
pivotal
role
in
the
reversible
insertion/extraction
of
NH
4
+
within
transition
metal
oxides/hydroxides.
Although
fluorine
(F)
is
known
for
its
strong
electronegativity
and
potential
to
form
robust
with
,
specific
influence
on
storage
remains
unexplored.
Herein,
we
systematically
investigate
effects
F-based
bond
chemistry
layered
double
hydroxide
matrix,
where
F
species
are
introduced
subsequently
partially
removed
via
an
electrochemical
method.
Our
findings
demonstrate
that
while
increasing
doping
content
accelerates
diffusion
due
F’s
electronegativity,
it
also
triggers
crystal
shrinkage
depresses
capacity.
To
this
end,
controlled
partial
removal
F,
employing
lye-assistant
strategy,
induces
expanded
interlayer
spacing
distinct
edge
lattice
tearing,
thereby
facilitating
improved
accommodation.
The
retained
sites
couple
emerging
exposed
O
maintain
high
bonding
capability,
which
further
enhanced
by
formation
highly
active,
curved
hydroxyl
groups
centered
around
sites.
These
manipulations
significantly
boost
performance
electrode,
providing
insights
into
leveraging
strongest
developing
high-performance
energy
devices.
Energy & Fuels,
Год журнала:
2024,
Номер
38(15), С. 13585 - 13611
Опубликована: Июль 16, 2024
The
demand
for
energy
storage
is
exponentially
increasing
with
the
growth
of
human
population,
which
highly
intensive.
This
progress
demands
high-performing
and
reliable
devices
storing
delivering
charge
efficiently.
Hybrid
ion
supercapacitors
are
most
desirable
electrochemical
devices,
owing
to
their
versatile
tunable
performance
characteristics,
as
they
optimized
assembly
batteries
(energy
devices)
(power
devices).
In
this
regard,
ammonium
hybrid
(AIHSs)
have
grabbed
substantial
research
consideration
in
past
years
due
notable
advantages
affordability,
safety,
fast
diffusion
kinetics,
ecofriendliness,
high
density,
unique
tetrahedral
structure
abundant
carriers
NH4+
resources.
Up
now,
although
there
been
advancements
AIHSs
over
few
years,
including
various
electrode
materials,
device
structures,
novel
electrolytes,
remains
a
lack
comprehensive
reviews
that
cover
recent
developments
provide
critical
insights
into
rapidly
evolving
field.
Therefore,
review
culminates
fundamental
principles,
basic
mechanisms,
approaches
enhancing
performances
AIHSs,
focusing
on
improving
these
parameters
improve
specific
capacitance,
longevity
commercial
success
capacitors,
nascent
stages
development.
To
best
our
knowledge,
it
first
complete
account
from
mechanism
developments.
The
use
of
nanoporous
carbon
for
energy
storage
has
seen
a
significant
rise
due
to
its
exciting
properties
such
as
high
surface
area,
hierarchical
porosity
and
exceptional
electrochemical
properties.
These
unique
advantages
these
porous
nanostructures
can
be
coupled
with
the
individual
doping
heteroatoms
S,
N,
O,
B
achieving
capacity
stability.
Herein,
we
integrated
synthesis
nitride
(CN)
borocarbonitride
(BCN)
solid
state
activation
introducing
multiple
(B,
S)
onto
frameworks.
produced
materials
exhibit
abundance
micro
mesoporosity,
area
2909
m
Abstract
Aqueous
rechargeable
batteries
using
abundant
multi‐ion
cations
have
received
increasing
attention
in
the
energy
storage
field
for
their
high
safety
and
low
cost.
Layered
double
hydroxides
(LDHs)
possess
a
two‐dimensional
structure
exhibit
great
potential
as
cathodes
intercalation.
However,
insufficient
active
sites
of
LDHs
result
capacities
discharging
process.
Interestingly,
after
deprotonation
process
favorable
electrochemical
performance
multi‐cation
The
has
been
widely
found
oxygen
evolution
reaction
field,
where
lose
H
laminates
converts
to
deprotonated
γ
‐phase
MOOHs
(MOOs).
Herein,
we
take
comprehensive
overview
dynamics
transformation
LDHs.
Furthermore,
development
advanced
aqueous
battery
cathode
metal
anode
based
on
is
explored
summarized.
Finally,
perspective
discussed.
