Batteries,
Год журнала:
2024,
Номер
10(10), С. 346 - 346
Опубликована: Сен. 27, 2024
Lithium-ion
capacitors
(LICs)
are
emerging
as
promising
hybrid
energy
storage
devices
that
combine
the
high
densities
of
lithium-ion
batteries
(LIBs)
with
power
supercapacitors
(SCs).
Nevertheless,
development
LICs
is
hindered
by
kinetic
imbalances
between
battery-type
anodes
and
capacitor-type
cathodes.
To
address
this
issue,
honeycomb-like
N-doped
carbon
matrices
encapsulating
Co1−xS/Co(PO3)2
heterostructures
were
prepared
using
a
simple
chemical
blowing-vulcanization
process
followed
phosphorylation
treatment
(Co1−xS/Co(PO3)2@NC).
The
Co1−xS/Co(PO3)2@NC
features
unique
heterostructure
engineered
within
honeycomb
structures,
which
efficiently
promotes
charge
transfer
at
interfaces,
alleviates
volume
expansion
Co-based
materials,
accelerates
reaction
kinetics.
optimal
composite
demonstrates
stable
reversible
capacity
371.8
mAh
g−1
after
800
cycles
1
A
g−1,
exhibits
an
excellent
rate
performance
242.9
even
8
alongside
enhanced
pseudocapacitive
behavior.
assembled
Co1−xS/Co(PO3)2@NC//AC
LIC
delivers
density
90.47
Wh
kg−1
(at
26.28
W
kg−1),
504.94
38.31
remarkable
cyclic
stablitiy
86.3%
retention
5000
cycles.
This
research
expected
to
provide
valuable
insights
into
design
conversion-type
electrode
materials
for
future
applications.
Batteries,
Год журнала:
2025,
Номер
11(2), С. 69 - 69
Опубликована: Фев. 8, 2025
Alkali
metal-ion
capacitors
(AMICs)
combine
the
advantages
of
high
specific
energy
alkali
batteries
(AMIBs)
and
power
output
supercapacitors
(SCs),
which
are
considered
highly
promising
efficient
storage
devices.
It
is
found
that
carbon
has
been
most
widely
used
electrode
material
AMICs
due
to
its
low
cost,
a
large
surface
area,
excellent
electrical
conductivity.
However,
application
limited
by
capacity,
finite
kinetic
performance,
few
active
sites.
Doping
heteroatoms
in
materials
an
effective
strategy
adjust
their
microstructures
improve
electrochemical
effectively
helps
increase
pseudo-capacitance,
enhance
wettability,
ionic
migration
rate.
Moreover,
appropriate
heteroatom
doping
can
purposefully
guide
design
advanced
AMICs.
Herein,
systematic
review
(N,
S,
P,
B)-doped
carbon,
acted
as
positrode
negatrode
(M
=
Li,
Na,
K)
recent
years,
summarized.
emphasis
placed
on
mechanism
single-element
versus
two-element
for
enhancement
performance
positrodes
negatrodes,
introduction
use
doped
dual-carbon
(DC-AMICs)
discussed.
Finally,
outlook
given
solve
problems
arising
when
using
practical
applications
future
development
directions
presented.
Article
Hierarchical
Porous
Carbon-Carbon
Dot
Architecture
as
a
High
Energy
Density
Cathode
for
Lithium-Metal
Capacitors
Gayathry
Ganesh
1,2,
Gokul
Raj
Deivendran
3,
Vaishak
Sunil
Izan
Izwan
Misnon
Chun-Chen
Yang
3,4
and
Rajan
Jose
1,2,3,*
1
Center
Advanced
Intelligent
Materials,
Universiti
Malaysia
Pahang
Al-Sultan
Abdullah,
Kuantan
26300,
2
Faculty
of
Industrial
Sciences
Technology,
3
Battery
Research
Green
Energy,
Ming
Chi
University
New
Taipei
City
243303,
Taiwan
4
Department
Chemical
Engineering,
*
Correspondence:
[email protected]
or
[email protected]
Received:
8
December
2024;
Revised:
19
March
2025;
Accepted:
24
Published:
26
2025
Abstract:
Hybrid
devices
such
lithium-metal
capacitors
(LMC)
are
in
rising
demand
can
simultaneously
meet
the
requirements
energy
storage
with
superior
specific
high
power.
LMCs
combine
lithium
anode
an
activated
carbon
cathode
Biomass-derived
porous
(BC)
is
ideal
candidate
material
stands
out
its
tuneable
porosity,
sustainability,
low
cost.
However,
inherent
limitations
BC
delivering
optimal
electrochemical
performance
necessitate
using
additives
electronic
conductivity.
In
this
study,
we
introduce
functionalized
quantum
dots
(f-CDs),
synthesized
from
biomass,
effective
additive
to
enhance
BC.
The
physicochemical
figures
merit
integrated
7
wt.%
f-CDs
(BC@f-CD)
were
systematically
compared
modified
0.4
single
walled
nanotube
(BC@s-CNT).
Electrochemical
evaluations
revealed
that
BC@f-CD
exhibited
capacitance
approximately
191
F·g−1
within
2–4.3
V
voltage
window.
nano-sized
dimensions
functional
groups
significantly
improved
performance,
enabling
remarkable
111%
increase
energy.
Additionally,
demonstrated
excellent
cycling
stability,
retaining
~86%
initial
capacity
after
5000
cycles,
outperforming
traditional
batteries.
This
study
underscores
potential
cost-effective
efficient
alternative
s-CNTs
LMCs,
providing
sustainable
solution
advanced
applications.
Journal of Materials Chemistry A,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Sodium-ion
capacitors
currently
suffer
from
a
lack
of
understanding
porous
carbon
cathodes.
Linear
correlations
revealed
that
the
specific
capacity
is
driven
by
surface
area,
structural
defects,
and
functional
groups.
