SmartMat,
Год журнала:
2021,
Номер
2(2), С. 176 - 201
Опубликована: Июнь 11, 2021
Abstract
Potassium‐ion
batteries
(PIBs)
show
great
potential
in
the
application
of
large‐scale
energy
storage
devices
due
to
comparable
high
operating
voltage
with
lithium‐ion
and
lower
cost.
Carbon‐based
materials
are
promising
candidates
as
anodes
for
PIBs,
their
low
cost,
abundance,
nontoxicity,
environmental
benignity,
sustainability.
In
this
review,
we
will
first
discuss
potassium
mechanisms
graphitic
defective
carbon
carbon‐based
composites
various
compositions
microstructures
comprehensively
understand
behavior.
Then,
several
strategies
based
on
heteroatoms
doping,
unique
nanostructure
design,
introduction
conductive
matrix
form
proposed
optimize
achieve
performance
PIBs.
Finally,
conclude
existing
challenges
perspectives
further
development
materials,
which
is
believed
promote
practical
PIBs
future.
Abstract
Heteroatom‐doped
porous
carbon
materials
with
distinctive
surface
properties
and
capacitive
behavior
have
been
accepted
as
promising
candidates
for
supercapacitor
electrodes.
Currently,
the
researches
mainly
focus
on
developing
facile
synthetic
method
unveiling
structure‐activity
relationship
to
further
elevate
their
performance.
Here,
B,
N
co‐doped
sheet
(BN‐PCS)
is
constructed
by
one‐pot
pyrolysis
of
agar
in
KCl/KHCO
3
molten
salt
system.
In
this
process,
urea
acts
directing
agent
guide
formation
2D
morphology,
decomposition
KHCO
boric
acid
creates
rich
micro‐
mesopores
framework.
The
specific
capacitance
optimized
BN‐PCS
reaches
361.1
F
g
−1
at
a
current
density
0.5
A
an
aqueous
KOH
electrolyte.
Impressively,
fabricated
symmetrical
affords
maximum
energy
43.5
Wh
kg
power
375.0
W
1.0
mol
L
TEABF
4
/AN
It
also
achieves
excellent
long‐term
stability
retention
91.1%
Columbic
efficiency
100%
over
10
000
cycles.
This
study
indicates
effective
engineering
advanced
high‐performance
storage
devices.
Abstract
Porous
carbon
has
been
widely
focused
to
solve
the
problems
of
low
coulombic
efficiency
(ICE)
and
multiplication
capacity
Sodium‐ion
batteries
(SIBs)
anodes.
The
superior
energy
storage
properties
two‐dimensional(2D)
nanosheets
can
be
realized
by
modulating
structure,
but
limited
sources,
making
it
challenging
obtain
2D
structures
with
large
surface
area.
In
this
work,
a
new
method
for
forming
materials
high
N/S
doping
content
based
on
combustion
activation
using
dual
effect
K
2
SO
4
/KNO
3
is
proposed.
synthesized
material
as
an
anode
SIBs
reversible
344.44
mAh
g
−1
at
0.05
A
.
Even
current
density
5
Ag
,
remained
143.08
And
ICE
sodium‐ion
in
ether
electrolytes
≈2.5
times
higher
than
that
ester
electrolytes.
sodium
mechanism
ether/ester‐based
further
explored
through
ex‐situ
characterizations.
disparity
electrochemical
performance
ascribed
discrepancy
kinetics,
wherein
ether‐based
exhibit
rate
Na
+
shedding
compared
ester‐based
This
work
suggests
effective
way
develop
doubly
doped
SIBs.
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(16), С. 9400 - 9420
Опубликована: Янв. 1, 2024
The
fundamental
and
research
progress
on
carbon
materials
for
zinc
ion
hybrid
capacitors
(ZHCs)
is
systematically
summarized.
existing
challenges
perspectives
are
also
proposed
to
promote
the
practical
applications
of
high-performance
ZHCs.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
unknown
Опубликована: Апрель 26, 2024
Porous
carbons
have
shown
their
potential
in
sodium-ion
batteries
(SIBs),
but
the
undesirable
initial
Coulombic
efficiency
(ICE)
and
rate
capability
hinder
practical
application.
Herein,
learning
from
nature,
we
report
an
efficient
method
for
fabricating
a
carbon
framework
(CK)
with
delicate
porous
structural
regulation
by
biomimetic
mineralization-assisted
self-activation.
The
abundant
pores
defects
of
CK
anode
can
improve
ICE
performance
SIBs
ether-based
electrolytes,
whereas
they
are
confined
carbonate
ester-based
electrolytes.
Notably,
electrolytes
enable
to
possess
excellent
(82.9%)
high-rate
(111.2
mAh
g-1
at
50
A
g-1).
Even
after
5500
cycles
large
current
density
10
g-1,
capacity
retention
still
be
maintained
73.1%.
More
importantly,
full
cell
consisting
Na3V2(PO4)3
cathode
delivers
high
energy
204.4
Wh
kg-1,
power
2828.2
W
kg-1.
Such
outstanding
is
attributed
(1)
hierarchical
pores,
oxygen
doping,
that
pave
way
transportation
storage
Na+,
further
enhancing
ICE;
(2)
high-proportion
NaF-based
solid-electrolyte-interphase
(SEI)
layer
facilitates
Na+
kinetics
electrolytes;
(3)
determine
dominate
SIBs.
These
results
provide
compelling
evidence
promising
our
synthetic
strategy
development
carbon-based
materials
electrochemical
storage.
ACS Nano,
Год журнала:
2021,
Номер
15(6), С. 10217 - 10227
Опубликована: Май 26, 2021
Carbonaceous
materials
have
been
considered
as
promising
anodes
for
potassium-ion
batteries
(PIBs)
because
of
their
high
electronic
conductivity,
eco-friendliness,
and
structural
stability.
However,
the
small
interlayer
spacing
serious
volume
expansion
caused
by
repeated
insertion/extraction
large
K-ions
restrict
storage
performance.
Herein,
F
N
codoped
carbon
nanosheets
(FNCS)
with
rich-edge
defects
are
designed
to
resolve
these
problems.
The
doping
is
in
favor
formation
more
edge
layer,
offering
strong
K+
adsorption
capability
promoting
storage.
ultrathin
can
provide
a
contact
area
electrochemical
reactions
shorten
transportation
pathways
both
electrons.
Consequently,
FNCS
anode
shows
reversible
capacity
(610
mAh
g–1
at
0.1
A
g–1)
ultrastable
cyclability
over
4000
cycles
5
g–1.
Moreover,
K-ion
full
cells
(FNCS|K2FeFe(CN)6)
display
excellent
cycling
stability
(128
1
after
500
cycles)
rate
(93
20
g–1).
This
design
strategy
be
extended
other
electrode
high-performance
energy
storage,
such
magnesium-ion
batteries,
supercapacitors,
electrocatalysis.
Advanced Energy Materials,
Год журнала:
2021,
Номер
11(29)
Опубликована: Июнь 12, 2021
Abstract
Potassium‐ion
batteries
(PIBs)
have
emerged
as
a
compelling
complement
to
existing
lithium‐ion
for
large‐scale
energy
storage
applications,
due
the
resource‐abundance
of
potassium,
low
standard
redox
potential
and
high
conductivity
K
+
‐based
electrolytes.
Rapid
progress
has
been
made
in
identifying
suitable
carbon
anode
materials
address
sluggish
kinetics
huge
volume
variation
problems
caused
by
large‐size
.
However,
most
research
into
focused
on
structural
design
performance
optimization
one
or
several
parameters,
rather
than
considering
holistic
especially
realistic
applications.
This
perspective
examines
recent
efforts
enhance
terms
initial
Coulombic
efficiency,
capacity,
rate
capability,
cycle
life.
The
balancing
intercalation
surface‐driven
capacitive
mechanisms
while
designing
structures
is
emphasized,
after
which
compatibility
with
electrolyte
cell
assembly
technologies
should
be
considered
under
practical
conditions.
It
anticipated
that
this
work
will
engender
further
intensive
can
better
aligned
toward
implementation
storage.
