Three-dimensional
MoS2
nanosheets
uniformly
embedded
within
NiTe
nanorods
are
synthesized
via
one-step
hydrothermal
method
and
subsequently
coated
with
a
carbon
layer
to
form
stable
NiTe@MoS2@C
heterojunctions.
The
heterojunctions
exhibit
low
lattice
misfits
(δ=20.0%),
strong
electric
fields,
uniform
shells,
resulting
in
unique
electronic
configurations
abundant
active
sites.
As
an
anode
for
potassium-ion
batteries,
demonstrated
impressive
reversible
capacity
of
258.4
mAh
g-1
after
100
cycles
at
rate
200
mA
g-1.
Moreover,
it
showed
177.5
high
5000
g-1,
indicating
excellent
performance.
Notably,
even
the
NiTe@MoS2@C//perylene
tetracarboxylic
dianhydride
(PTCDA)
full
battery
configuration,
significant
87.4
was
maintained
highlighting
its
remarkable
potential
practical
applications
batteries.
Theoretical
calculations
further
revealed
that
well-designed
NiTe@MoS2
heterojunction
significantly
enhances
K+
ion
diffusion.
Small,
Journal Year:
2024,
Volume and Issue:
20(32)
Published: March 25, 2024
Abstract
Constructing
a
porous
structure
is
considered
an
appealing
strategy
to
improve
the
electrochemical
properties
of
carbon
anodes
for
potassium‐ion
batteries
(PIBs).
Nevertheless,
correlation
between
K‐storage
performance
and
pore
has
not
been
well
elucidated,
which
hinders
development
high‐performance
anodes.
Herein,
various
carbons
are
synthesized
with
porosity
structures
ranging
from
micropores
micro/mesopores
mesopores,
systematic
investigations
conducted
establish
relationship
characteristics
performance.
It
found
that
fail
afford
accessible
active
sites
K
ion
storage,
whereas
mesopores
can
provide
abundant
surface
adsorption
sites,
enlarged
interlayer
spacing
facilitates
intercalation
process,
thus
resulting
in
significantly
improved
performances.
Consequently,
PCa
electrode
prominent
mesoporous
achieves
highest
reversible
capacity
421.7
mAh
g
−1
excellent
rate
capability
191.8
at
5
C.
Furthermore,
assembled
hybrid
capacitor
realizes
impressive
energy
density
151.7
Wh
kg
power
398
W
.
The
proposed
work
only
deepens
understanding
potassium
storage
materials
distinctive
porosities
but
also
paves
path
toward
developing
PIBs
customized
capabilities.
Applied Physics Letters,
Journal Year:
2024,
Volume and Issue:
124(18)
Published: April 29, 2024
Potassium-ion
batteries
(PIBs)
have
emerged
as
promising
candidates
for
cost-effective
and
sustainable
energy-storage
systems.
Nevertheless,
limited
by
the
large
K+
radius,
PIBs
great
difficulty
in
figuring
out
designing
suitable
host
materials.
Herein,
a
cathode
material
K3V2(PO4)2O2F
(KVPOF)
has
been
carefully
prepared.
It
exhibits
high
specific
capacity
close
to
theoretical
value,
116.3
mAh/g
at
20
mA/g
within
voltage
window
of
2.0–4.5
V
vs
K+/K,
corresponding
de-/intercalation
process
∼2
mol
per
formula
unit.
In
addition,
it
presents
an
average
operating
plateau
about
3.5
V,
resulting
energy
density
410
Wh/kg.
The
crystal
structure
phase
transition
are
revealed
situ
x-ray
diffraction,
is
found
be
fully
reversible
during
K+.
Furthermore,
potential
KVPOF
applications
low
temperatures
was
explored,
full
cell
matched
with
graphite
anode
demonstrated
fair
electrochemical
performance.
experimental
results
suggest
feasibility
using
rechargeable
PIBs.
Batteries & Supercaps,
Journal Year:
2024,
Volume and Issue:
7(3)
Published: Jan. 5, 2024
Abstract
A
full
series
of
variously
lithiated
graphite
anodes
material
Li
x
C
6
(0<x<1)
corresponding
to
a
different
state‐of‐charge
(SOC)
between
0
%
and
100
was
collected
from
18650‐type
cylinder
Li‐ion
batteries,
the
thermal
structural
behavior
these
electrodes
mapped
using
ex
situ
high‐resolution
X‐ray
neutron
diffraction.
Their
analyzed
over
broad
temperature
range.
At
high
temperatures,
non‐reversible
decomposition
takes
place,
accompanied
by
loss
intercalated
lithium
ions,
forming
novel
phases
such
as
LiF
2
O
strongly
coupled
degradation
solid
electrolyte
interface
(SEI).
Complementary
calorimetric
measurements
showed
exothermic
chemical
reactions
during
matching
well
diffraction
data.
Post
mortem
analysis
applying
scanning
electron
microscopy
revealed
various
morphological
features
supplementing
treatment
battery
highlighted
importance
SEI
layer
cycling
cell
its
degradation.
Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(23)
Published: April 1, 2024
Abstract
Graphite
is
considered
to
be
the
most
auspicious
anode
candidate
for
potassium
ion
batteries.
However,
inferior
rate
performances
and
cycling
stability
restrict
its
practical
applications.
Few
studies
have
investigated
modulating
graphitization
degree
of
graphitic
materials.
Herein,
a
nitrogen‐doped
carbon‐coated
carbon
fiber
composite
with
tunable
(CNF@NC)
through
etching
growth,
in‐situ
oxidative
polymerization,
subsequent
carbonization
process
reported.
The
prepared
CNF@NC
abundant
electrochemical
active
sites
rapid
K
+
/electron
transfer
pathway,
can
effectively
shorten
distance
promote
insertion/removal
.
Amorphous
domains
short‐range
curved
graphite
layers
provide
ample
mitigation
spaces
storage,
alleviating
volume
expansion
highly
graphitized
CNF
during
repeated
insertion/de‐intercalation.
As
expected,
CNF@NC‐5
electrode
presents
high
initial
coulombic
efficiency
(ICE)
69.3%,
an
unprecedented
reversible
volumetric
capacity
510.2
mA
h
cm
−3
at
0.1
A
g
−1
after
100
cycles
mass‐capacity
294.9
storage
mechanism
reaction
kinetic
analysis
are
studied
by
combining
first‐principles
calculation.
It
manifests
that
in
adsorption‐insertion‐insertion
(i.e.,
“1+2”
model).
solid
electrolyte
interphase
(SEI)
film
forming
also
detected.
Carbon Energy,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 20, 2025
ABSTRACT
Carbon
electrocatalyst
materials
based
on
lignocellulosic
biomass
with
multi‐components,
various
dimensions,
high
carbon
content,
and
hierarchical
morphology
structures
have
gained
great
popularity
in
electrocatalytic
applications
recently.
Due
to
the
catalytic
deficiency
of
neutral
atoms,
usage
single
lignocellulosic‐based
electrocatalysis
involving
energy
storage
conversion
presents
unsatisfactory
applicability.
However,
atomic‐level
modulation
lignocellulose‐based
can
optimize
electronic
structures,
charge
separation,
transfer
processes,
so
forth,
which
results
substantially
enhanced
performance
carbon‐based
catalysts.
This
paper
reviews
recent
advances
rational
design
as
electrocatalysts
from
an
perspective,
such
self/external
heteroatom
doping
metal
modification.
Then,
through
systematic
discussion
principles
reaction
mechanisms
catalysts,
prepared
catalysts
rechargeable
batteries
are
reviewed.
Finally,
challenges
improving
prospects
diverse
review
contributes
synthesis
strategy
via
modulation,
turn
promotes
lignocellulose
valorization
for
conversion.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 5, 2024
Abstract
Metal‐organic
frameworks
(MOFs)
have
been
extensively
studied
and
applied
as
promising
active
materials
in
the
field
of
energy
storage
conversion.
Recently,
conductive
π‐d
conjugated
coordination
polymers
(CCPs)
garnered
significant
attention
due
to
their
high
conductivity,
porosity,
tunable
components,
adjustable
pore
sizes.
These
CCPs
typically
consist
transition
metal
ions
organic
ligands,
forming
an
in‐plane
system.
In
this
review,
a
concise
summary
design
principles
are
provided,
synthesis
methods,
reaction
mechanisms
electrodes
for
systems,
including
metal‐ion
batteries
supercapacitors.
addition,
several
novel
applications
highlighted,
such
metal‐air
photo‐enhanced
batteries.
Finally,
challenges
that
need
be
addressed
is
discussed
urgently
offer
perspectives
on
further
application
more
advanced
conversion
systems.
