Proceedings of the National Academy of Sciences,
Год журнала:
2023,
Номер
120(52)
Опубликована: Дек. 22, 2023
Potassium-ion
batteries
(PIBs)
have
attracted
ever-increasing
interest
due
to
the
abundant
potassium
resources
and
low
cost,
which
are
considered
a
sustainable
energy
storage
technology.
However,
graphite
anodes
employed
in
PIBs
suffer
from
capacity
sluggish
reaction
kinetics
caused
by
large
radius
of
ions.
Herein,
we
report
nitrogen-doped,
defect-rich
hollow
carbon
nanospheres
with
contact
curved
interfaces
(CCIs)
on
nanotubes
(CNTs),
namely
CCI-CNS/CNT,
boost
both
electron
transfer
potassium-ion
adsorption.
Density
functional
theory
calculations
validate
that
engineering
CCIs
significantly
augments
electronic
state
near
Fermi
level,
thus
promoting
transfer.
In
addition,
exhibit
pronounced
affinity
for
ions,
their
adsorption
subsequently
benefiting
storage.
As
result,
rationally
designed
CCI-CNS/CNT
anode
shows
remarkable
cyclic
stability
rate
capability.
This
work
provides
strategy
enhancing
performance
carbonaceous
materials
through
CCI
engineering,
can
be
further
extended
other
battery
systems.
Abstract
Developing
novel
techniques
to
convert
lignin
into
sustainable
chemicals
and
functional
materials
is
a
critical
route
toward
the
high-value
utilization
of
lignocellulosic
biomass.
Lignin-derived
carbon
hold
great
promise
for
applications
in
energy
chemical
engineering,
catalysis
environmental
remediation.
In
this
review,
state-of-art
sciences
technologies
controllable
synthesis
lignin-derived
are
summarized,
pore
structure
crystalline
morphology
controlling
methodologies
thoroughly
outlined
critically
discussed.
Green
engineering
with
cost-effectiveness
precise
carbonization
tuning
microstructure
future
research
trends
materials.
Future
directions
that
could
be
employed
advance
commercial
then
proposed.
Advanced Energy Materials,
Год журнала:
2022,
Номер
12(41)
Опубликована: Сен. 1, 2022
Abstract
Potassium‐ion
batteries
hold
practical
potential
for
large‐scale
energy
storage
owing
to
their
appealing
cell
voltage
and
cost‐effective
features.
The
development
of
anode
materials
with
high
rate
capability
satisfactory
cycle
lifespan,
however,
is
one
the
key
elements
exploiting
this
electrochemical
system
at
levels.
Here,
a
template‐assisted
strategy
reported
acquiring
bimetallic
telluride
heterostructure
which
supported
on
N‐doped
carbon
shell
(ZnTe/CoTe
2
@NC)
that
promotes
diffusion
K
+
ions
rapid
charge
transfer.
It
shown
in
heterojunctions,
electron‐rich
Te
sites
built‐in
electric
fields
contributed
by
electron
transfer
from
ZnTe
CoTe
concomitantly
provide
abundant
cation
adsorption
facilitate
interfacial
transport
during
potassiation/depotassiation.
relatively
fine
ZnTe/CoTe
nanoparticles
imparted
heterojunction
result
structural
stability,
together
highly
reversible
capacity
up
5000
cycles
5
A
g
−1
.
Moreover,
using
judiciously
combined
experiment
theoretical
computation,
it
demonstrated
barrier
heterojunctions
significantly
lower
than
individual
counterparts.
This
quantitative
design
fast
durable
heterostructures
can
be
immediate
benefit
rational
low‐cost
conversion.
Advanced Functional Materials,
Год журнала:
2022,
Номер
32(48)
Опубликована: Сен. 28, 2022
Abstract
Defects
engineering
is
an
attractive
strategy
to
improve
the
potassium
storage
performance
of
carbon
anodes.
The
current
studies
mainly
focus
on
introduction
external
defects
via
heteroatom
doping,
however,
exploration
effect
intrinsic
caused
by
loss
atoms
or
distortion
in
crystal
lattice
still
lacking
date.
Hence,
a
series
materials
with
different
defect
levels
are
developed
soft‐template
assisted
method.
It
found
that
content
synergistically
determined
application
template
and
pyrolysis
temperature,
higher
more
likely
expose
enormous
edge
active
sites.
This
greatly
promotes
K‐adsorption
during
surface‐induced
capacitive
process,
therefore
strong
positive
correlation
between
capacity/capacity
retention
confirmed.
As
result,
electrode
maximum
realizes
good
capacity
rate
capability
long
cycle
lifespan
(225.9
mAh
g
−1
at
2
A
over
2000
cycles).
study
offers
insight
into
role
performance.
Carbon Energy,
Год журнала:
2022,
Номер
4(6), С. 1182 - 1213
Опубликована: Июль 8, 2022
Abstract
Carbon
materials,
including
graphite,
hard
carbon,
soft
graphene,
and
carbon
nanotubes,
are
widely
used
as
high‐performance
negative
electrodes
for
sodium‐ion
potassium‐ion
batteries
(SIBs
PIBs).
Compared
with
other
materials
abundant,
low‐cost,
environmentally
friendly,
have
excellent
electrochemical
properties,
which
make
them
especially
suitable
electrode
of
SIBs
PIBs.
traditional
modifications
the
morphology
size
nanomaterials
represent
effective
strategies
to
improve
quality
materials.
Different
nanostructures
different
contributions
toward
improving
performance
so
synthesis
is
promising
controlling
This
paper
reviews
progress
made
challenges
in
use
PIBs
recent
years.
The
differences
Na
+
K
storage
mechanisms
among
types
emphasized.
Advanced Functional Materials,
Год журнала:
2022,
Номер
33(8)
Опубликована: Дек. 16, 2022
Abstract
The
development
of
flexible
electrodes
with
high
mass
loading
and
efficient
electron/ion
transport
is
great
significance
but
still
remains
the
challenge
innovating
suitable
electrode
structures
for
energy
density
application.
Herein,
first
time,
lignosulfonate‐derived
N/S‐co‐doped
graphene‐like
carbon
in
situ
formed
within
an
interface
engineered
cellulose
textile
through
a
sacrificial
template
method.
Both
experimental
theoretical
calculations
disclose
that
pomegranate‐like
structure
continuous
conductive
pathways
porous
characteristics
allows
sufficient
ion/electron
throughout
entire
structures.
As
result,
obtained
delivers
remarkable
integrated
capacitance
6534
mF
cm
−2
(335.1
F
g
−1
)
superior
stability
at
industrially
applicable
19.5
mg
.
A
pseudocapacitive
cathode
ultrahigh
7000
can
also
be
based
on
same
engineering.
as‐assembled
asymmetric
supercapacitor
achieves
areal
3625
,
maximum
1.06
mWh
outperforms
most
other
reported
high‐loading
supercapacitors.
This
synthesis
method
structural
engineering
strategy
provide
materials
design
concepts
wide
range
applications
fields
storage
beyond
Nano-Micro Letters,
Год журнала:
2023,
Номер
15(1)
Опубликована: Янв. 27, 2023
Amorphous
carbons
are
promising
anodes
for
high-rate
potassium-ion
batteries.
Most
low-temperature
annealed
amorphous
display
unsatisfactory
capacities.
Heteroatom-induced
defect
engineering
of
could
enhance
their
reversible
Nevertheless,
most
lignocellulose
biomasses
lack
heteroatoms,
making
it
a
challenge
to
design
highly
heteroatom-doped
(>
10
at%).
Herein,
we
report
new
preparation
strategy
carbon
anodes.
Nitrogen/sulfur
co-doped
lignin-derived
porous
(NSLPC)
with
ultra-high
nitrogen
doping
levels
(21.6
at%
N
and
0.8
S)
from
renewable
lignin
biomacromolecule
precursors
were
prepared
through
supramolecule-mediated
pyrolysis
strategy.
This
supermolecule/lignin
composite
decomposes
forming
covalently
bonded
graphitic
carbon/amorphous
intermediate
product,
which
induces
the
formation
high
heteroatom
in
obtained
NSLPC.
unique
chemistry
NSLPC
enable
abundant
defective
active
sites
adsorption
K+
improved
kinetics.
The
anode
delivered
capacity
419
mAh
g‒1
superior
cycling
stability
(capacity
retention
96.6%
at
1
A
1000
cycles).
Potassium-ion
hybrid
capacitors
assembled
by
exhibited
excellent
(91%
2000
cycles)
energy
density
71
Wh
kg-1
power
92
W
kg-1.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(17)
Опубликована: Март 1, 2023
Carbonaceous
materials
are
promising
anodes
for
practical
potassium-ion
batteries,
but
fail
to
meet
the
requirements
durability
and
high
capacities
at
low
potentials.
Herein,
we
constructed
a
durable
carbon
anode
high-energy-density
K-ion
full
cells
by
preferential
pyrolysis
strategy.
Utilizing
S
N
volatilization
from
π-π
stacked
supermolecule,
process
introduces
low-potential
active
sites
of
sp2
hybridized
vacancies,
endowing
"vacancy-adsorption/intercalation"
mechanism.
The
as-prepared
exhibits
capacity
384.2
mAh
g-1
(90
%
locates
below
1
V
vs.
K/K+
),
which
contributes
energy
density
163
Wh
kg-1
battery.
Moreover,
abundant
vacancies
alleviate
volume
variation,
boosting
cycling
stability
over
14
000
cycles
(8400
h).
Our
work
provides
new
synthesis
approach
with
densities.