Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 24, 2024
This
minireview
revisits
various
biomass-derived
carbon
composites
with
metal
oxides,
layered
double
hydroxides,
biopolymers,
and
the
use
of
ionic
liquids
as
electrolytes
for
green
supercapacitors.
These
materials
are
abundant,
stable,
nontoxic,
offer
high
surface
area,
provide
electrolyte
accessibility
due
to
their
porous
architecture,
have
excellent
electrical
conductivity.
Due
environmental
concerns
diminishing
supply
fossil
fuels,
electrochemical
energy
storage
devices
gained
significant
attention
in
recent
years.
Supercapacitors
(SCs)
hold
a
position
enhanced
power
density
compared
those
other
devices.
However,
utilize
SCs
effectively
across
applications,
performance
must
be
improved.
Electronic
integral
daily
life
but
can
pose
hazards
when
discarded
through
conventional
landfill
or
incineration
methods.
is
because
these
often
contain
harmful
chemicals,
such
sulfur,
cyanide,
fluorine
groups.
To
tackle
this
issue,
there
increasing
interest
developing
supercapacitor
components,
electrodes,
electrolytes,
binders,
conductive
substrates,
that
safe
dispose
no
hazards.
Since
electrode
crucial
supercapacitor's
performance,
focus
devoted
from
clean
renewable
sources,
biopolymers.
In
fact,
ecofriendly
electrodes
advance
technologies
well.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 9, 2024
Abstract
In
non‐metallic
atom‐doped
carbonaceous
materials,
the
disparity
in
electronegativity
between
doped
constituents
and
carbon
atoms
predetermines
bonding
topology
of
covalent
bonds
distribution
electron
density.
This,
consequently,
influences
polarization
transport
behavior
within
domain
electromagnetic
wave
attenuation
attributes
material.
However,
influence
formed
by
doping
with
weakly
electronegative
on
density
distribution,
effects,
remains
uncharted.
To
address
this
deficiency,
study
fabricates
a
porous
material
(NCP)
incorporates
boron‐doped
to
form
tunable
B─C
configurations
(B‐NCP).
By
modulating
configuration
proportion,
it
is
feasible
achieve
synergistic
optimization
conductive
loss
B‐NCP
specimen.
The
optimized
prototype
‐1200
sample
displays
exceptionally
efficient
absorption
capabilities
minimum
reflection
(RL
min
)
−52.03
dB
an
effective
bandwidth
(EAB)
5.36
GHz.
This
presents
conscientious
model
for
comprehending
mechanisms
associated
atom
carbon‐based
wave‐absorbing
materials.
Nano-Micro Letters,
Journal Year:
2025,
Volume and Issue:
17(1)
Published: Jan. 27, 2025
Abstract
Compared
with
Zn
2+
,
the
current
mainly
reported
charge
carrier
for
zinc
hybrid
capacitors,
small-hydrated-sized
and
light-weight
NH
4
+
is
expected
as
a
better
one
to
mediate
cathodic
interfacial
electrochemical
behaviors,
yet
has
not
been
unraveled.
Here
we
propose
an
-modulated
cationic
solvation
strategy
optimize
spatial
distribution
achieve
dynamic
/NH
co-storage
boosting
Zinc
capacitors.
Owing
hierarchical
solvated
structure
in
Zn(CF
3
SO
)
2
–NH
CF
electrolyte,
high-reactive
small-hydrate-sized
(H
O)
induce
Helmholtz
plane
reconfiguration,
thus
effectively
enhancing
density
activate
20%
capacity
enhancement.
Furthermore,
adsorbed
hydrated
ions
afford
high-kinetics
ultrastable
C‧‧‧H
(NH
storage
process
due
much
lower
desolvation
energy
barrier
compared
heavy
rigid
Zn(H
6
(5.81
vs.
14.90
eV).
Consequently,
physical
uptake
multielectron
redox
of
carbon
cathode
enable
capacitor
deliver
high
(240
mAh
g
−1
at
0.5
A
),
large-current
tolerance
(130
50
ultralong
lifespan
(400,000
cycles).
This
study
gives
new
insights
into
design
cathode–electrolyte
interfaces
toward
advanced
zinc-based
storage.
Advanced Sustainable Systems,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 10, 2025
Abstract
Heteroatoms
doped
hierarchical
porous
carbon
shows
great
potentiality
as
electrode
materials
for
zinc
ion
hybrid
capacitors.
Herein,
nitrogen,
oxygen,
and
sulfur
co‐doped
(NSPC)
is
synthesized
by
one‐step
pyrolysis
of
the
mixture
KHCO
3
,
starch,
acesulfame
potassium.
The
obtained
NSPC‐700
samples
possess
3D
interconnected
architecture,
high
specific
surface
area,
rich
functional
groups.
Result
from
synergistic
effect,
a
capacitance
382
F
g
−1
at
0.5
A
outstanding
electrochemical
stabilization
with
retention
101.5%.
Density
theory
(DFT)
results
show
that
co‐doping
N,
O,
S
can
improve
adsorption
capacity
ions
enhance
charge
transfer
rate.
assembled
Zn//ZnSO
4
(aq)//NSPC‐700
capacitor
achieves
an
energy
density
120.84
Wh
kg
power
100
W
excellent
(90.9%
after
10,000
cycles).
