Energy Materials,
Journal Year:
2025,
Volume and Issue:
5(3)
Published: Jan. 15, 2025
Carbon-based
supercapacitors
have
emerged
as
promising
energy
storage
components
for
renewable
applications
due
to
the
unique
combination
of
various
physicochemical
characteristics
in
porous
carbon
materials
(PCMs)
that
can
improve
specific
capacitance
(SC)
properties.
It
is
essential
develop
a
methodical
approach
exploits
synergy
these
effects
PCMs
achieve
superior
performance.
In
this
study,
machine
learning
(ML)
provided
clear
direction
experiments
screening
key
features;
SHapley
Additive
exPlanations
analysis
on
ML
indicated
surface
area
and
doping
species
had
significant
synergistic
impact
SC
enhancement.
Utilizing
insights,
an
O,
N
co-doped
hierarchical
(ONPC-900)
was
synthesized
using
pyrolysis
strategy
through
K2CO3-assisted
in-situ
thermal
exfoliation
nanopore
generation.
This
method
leverages
role
nitride
(graphite-phase
nitride)
layer-stacked
template
oxygen
(O)-rich
properties
pre-treated
lignite,
enabling
controlled
synthesis
graphene-like
folded
amorphous
hybrid
structures
engineered
efficient
O
sites
high
area,
resulting
electrode
material
with
enhanced
structural
adaptability,
rapid
charge
transfer,
diffusion
mass
transfer
capacity.
Density
functional
theory
(DFT)
calculations
further
confirmed
pyrrole
nitrogen
(N-5),
carboxyl
(-COOH)
active
sites,
defect
structure
formed
by
pores
synergically
adsorption
electrolyte
ions
(K+)
electron
improving
The
optimized
ONPC-900
exhibited
impressive
440
F
g-1
(0.5
A
g-1),
outperforming
most
coal-based
PCMs.
study
provides
methodology
designing
synthesizing
optimizing
characteristic
parameters
synergism
from
complex
structure-activity
relationships
screening,
experimental
synthesis,
density
validation.
The
low-cost
and
high-capacity
SiOx
is
widely
recognized
as
an
ideal
anode
material
for
lithium
storage;
however,
the
challenges
of
low
conductivity
significant
volume
expansion
still
need
to
be
addressed.
In
this
work,
we
incorporated
into
a
lignin-derived
carbon
with
elevated
nitrogen
content
through
step-by-step
carbonization
strategy.
Initially,
electrostatic
assembly
facilitated
formation
complex
comprising
modified
lignin
SiO2,
which
was
subsequently
subjected
etching
steps.
Finally,
due
zinc
species
inhibiting
decomposition,
cocarbonization
porous
carbon/SiOx
complex,
oxalate,
melamine
enabled
construction
nitrogen-enriched
composite.
resulting
composite
exhibited
moderate
specific
surface
area,
abundant
mesoporous
channels,
exceptionally
high
doping
17.91
at.
%.
These
characteristics
effectively
enhanced
storage
transportation
ions
while
mitigating
expansion.
As
anodes
in
half
batteries,
reversible
capacity
optimized
reached
894
mAh/g
during
stable
cycles,
attributed
ion
diffusion
rate
kinetics
from
well
improved
structural
stability
encapsulated
structure.
Furthermore,
assembled
lithium-ion
capacitor
demonstrated
energy
density
82
Wh/kg
maintained
retention
93.1%
after
undergoing
15,000
cycles.
This
work
presents
novel
concept
synthesis
nitrogen-rich
matrixes
but
also
offers
insights
optimization
silicon-based
negative
electrodes
using
green
biomass.
Energy Materials,
Journal Year:
2025,
Volume and Issue:
5(3)
Published: Jan. 15, 2025
Carbon-based
supercapacitors
have
emerged
as
promising
energy
storage
components
for
renewable
applications
due
to
the
unique
combination
of
various
physicochemical
characteristics
in
porous
carbon
materials
(PCMs)
that
can
improve
specific
capacitance
(SC)
properties.
It
is
essential
develop
a
methodical
approach
exploits
synergy
these
effects
PCMs
achieve
superior
performance.
In
this
study,
machine
learning
(ML)
provided
clear
direction
experiments
screening
key
features;
SHapley
Additive
exPlanations
analysis
on
ML
indicated
surface
area
and
doping
species
had
significant
synergistic
impact
SC
enhancement.
Utilizing
insights,
an
O,
N
co-doped
hierarchical
(ONPC-900)
was
synthesized
using
pyrolysis
strategy
through
K2CO3-assisted
in-situ
thermal
exfoliation
nanopore
generation.
This
method
leverages
role
nitride
(graphite-phase
nitride)
layer-stacked
template
oxygen
(O)-rich
properties
pre-treated
lignite,
enabling
controlled
synthesis
graphene-like
folded
amorphous
hybrid
structures
engineered
efficient
O
sites
high
area,
resulting
electrode
material
with
enhanced
structural
adaptability,
rapid
charge
transfer,
diffusion
mass
transfer
capacity.
Density
functional
theory
(DFT)
calculations
further
confirmed
pyrrole
nitrogen
(N-5),
carboxyl
(-COOH)
active
sites,
defect
structure
formed
by
pores
synergically
adsorption
electrolyte
ions
(K+)
electron
improving
The
optimized
ONPC-900
exhibited
impressive
440
F
g-1
(0.5
A
g-1),
outperforming
most
coal-based
PCMs.
study
provides
methodology
designing
synthesizing
optimizing
characteristic
parameters
synergism
from
complex
structure-activity
relationships
screening,
experimental
synthesis,
density
validation.
