Advanced Science,
Journal Year:
2022,
Volume and Issue:
10(3)
Published: Nov. 24, 2022
Multipores
engineering
composed
of
micro/mesopores
is
an
effective
strategy
to
improve
potassium
storage
performance
via
providing
enormous
adsorption
sites
and
shortened
ions
diffusion
distance.
However,
a
detailed
exploration
the
role
played
by
macropores
in
still
lacking
has
been
barely
reported
until
now.
Herein,
superstructure
carbon
hexahedron
(DGN-900)
synthesized
using
poly
tannic
acid
(PTA)
as
precursor.
Due
spatially
confined
two-step
local
contraction
PTA
along
different
directions
dimensions
during
pyrolysis,
defective
nanosheets
with
are
formed,
while
realizing
balance
between
defects
content
graphitization
degree
regulating
temperature.
The
presence
conducive
accelerating
electrolyte
rapid
infiltration
within
electrode,
its
pore
volume
can
accommodate
electrode
structure
fluctuation
upon
cycling,
most
suitable
ratio
graphitic
provides
rich
sufficient
electrons
transfer
channels,
simultaneously.
These
advantages
enable
prominent
electrochemical
DGN-900
including
high
rate
(202.9
mAh
g-1
at
2
A
)
long
cycling
stability
over
2000
cycles.
This
unique
fabrication
strategy,
that
is,
coupled
structure,
makes
fast
durable
possible.
Chemical Society Reviews,
Journal Year:
2024,
Volume and Issue:
53(13), P. 7202 - 7298
Published: Jan. 1, 2024
The
growing
global
energy
demand
necessitates
the
development
of
renewable
solutions
to
mitigate
greenhouse
gas
emissions
and
air
pollution.
To
efficiently
utilize
yet
intermittent
sources
such
as
solar
wind
power,
there
is
a
critical
need
for
large-scale
storage
systems
(EES)
with
high
electrochemical
performance.
While
lithium-ion
batteries
(LIBs)
have
been
successfully
used
EES,
surging
price,
coupled
limited
supply
crucial
metals
like
lithium
cobalt,
raised
concerns
about
future
sustainability.
In
this
context,
potassium-ion
(PIBs)
emerged
promising
alternatives
commercial
LIBs.
Leveraging
low
cost
potassium
resources,
abundant
natural
reserves,
similar
chemical
properties
potassium,
PIBs
exhibit
excellent
ion
transport
kinetics
in
electrolytes.
This
review
starts
from
fundamental
principles
structural
regulation
PIBs,
offering
comprehensive
overview
their
current
research
status.
It
covers
cathode
materials,
anode
electrolytes,
binders,
separators,
combining
insights
full
battery
performance,
degradation
mechanisms,
Advanced Functional Materials,
Journal Year:
2022,
Volume and Issue:
32(48)
Published: Sept. 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.
Advanced Science,
Journal Year:
2022,
Volume and Issue:
9(20)
Published: May 9, 2022
Potassium-ion
batteries
(PIBs)
exhibit
a
considerable
application
prospect
for
energy
storage
systems
due
to
their
low
cost,
high
operating
voltage,
and
superior
ionic
conductivity.
As
vital
configuration
in
PIBs,
the
two-phase
interface,
which
refers
K-ion
diffusion
from
electrolyte
electrode
surface
(solid-liquid
interface)
migration
between
different
particles
(solid-solid
interface),
deeply
determines
diffusion/reaction
kinetics
structural
stability,
thus
significantly
affecting
rate
performance
cyclability.
However,
researches
on
interface
are
still
its
infancy
need
further
attentions.
This
review
first
starts
fundamental
understanding
of
solid-liquid
solid-solid
interfaces
in-depth
analyzing
effect
mechanism
improvement
strategies
them,
such
as
optimization
binders,
heterostructure
design,
modulation
interlayer
spacing,
etc.
Afterward,
research
progress
these
is
summarized
comprehensively.
Finally,
major
challenges
proposed,
corresponding
solving
presented.
expected
give
an
insight
into
importance
kinetics,
provides
guidance
developing
other
advanced
anodes
PIBs.
eScience,
Journal Year:
2023,
Volume and Issue:
4(3), P. 100181 - 100181
Published: Sept. 1, 2023
Sodium-ion
batteries
(SIBs)
with
low
cost
and
high
safety
are
considered
as
an
electrochemical
energy
storage
technology
suitable
for
large-scale
storage.
Hard
carbon,
which
is
inexpensive
has
both
capacity
sodium
potential,
regarded
the
most
promising
anode
commercial
SIBs.
However,
commercialization
of
hard
carbon
still
faces
technical
issues
initial
Coulombic
efficiency,
poor
rate
performance,
insufficient
cycling
stability,
due
to
intrinsically
irregular
microstructure
carbon.
To
address
these
challenges,
rational
design
crucial
achieving
high-performance
SIBs,
via
gaining
in-depth
understanding
its
structure–performance
correlations.
In
this
context,
our
review
firstly
describes
mechanism
from
perspective
microstructure's
formation.
We
then
summarize
state-of-art
development
providing
a
critical
overview
emergence
in
terms
precursor
selection,
design,
electrolyte
regulation
optimize
strategies
addressing
practical
problems.
Finally,
we
highlight
directions
future
achieve
believe
will
serve
basic
guidance
stimulate
more
exciting
research
into
other
types
devices.
Advanced Energy Materials,
Journal Year:
2023,
Volume and Issue:
14(4)
Published: Dec. 2, 2023
Abstract
Hard
carbon
stands
out
as
one
of
the
premier
anodes
for
potassium‐ion
batteries
(PIBs),
celebrated
its
cost‐effectiveness,
natural
abundance,
and
high
yield.
Yet,
performance
in
PIBs
remains
subpar
due
to
slow
kinetics,
a
result
large
ionic
radius
K‐ions.
Herein,
unique
lamellar
N/O/S‐tri‐doped
hard
(NOSHC)
has
been
developed
at
an
impressively
low
pyrolysis
temperature
500°C,
showcasing
distinct
“slope‐dominated”
characteristic.
NOSHC
delivers
superior
rate
with
dominant
surface‐driven
capacitive
contribution
(71.6%
scan
0.5
mV
s
−1
),
maintaining
robust
reversible
specific
capacity
125
mAh
g
(half
peak)
even
5
A
.
Its
stability
is
equally
commendable,
it
sustains
substantial
265
after
100
cycles
0.1
retains
210
post‐1000
1
Moreover,
undergoes
continuous
activation
via
potassiation/depotassiation
during
cycling.
Rich
heteroatom
doping
introduces
plethora
defects
vacancies,
creating
abundant
active
sites.
The
structure,
featuring
minimal
pores,
optimizes
K‐ions
transport
by
shortening
diffusion
length.
This
study
unveils
potential
enhancing
harnessing
carbonization
approach.
Journal of Physics Energy,
Journal Year:
2023,
Volume and Issue:
5(2), P. 021502 - 021502
Published: Feb. 27, 2023
Abstract
The
heavy
reliance
of
lithium-ion
batteries
(LIBs)
has
caused
rising
concerns
on
the
sustainability
lithium
and
transition
metal
ethic
issue
around
mining
practice.
Developing
alternative
energy
storage
technologies
beyond
become
a
prominent
slice
global
research
portfolio.
play
vital
role
in
shaping
future
landscape
storage,
from
electrified
mobility
to
efficient
utilization
renewable
energies
further
large-scale
stationary
storage.
Potassium-ion
(PIBs)
are
promising
given
its
chemical
economic
benefits,
making
strong
competitor
LIBs
sodium-ion
for
different
applications.
However,
many
unknown
regarding
potassium
processes
materials
how
it
differs
sodium
understanding
solid–liquid
interfacial
chemistry
is
massively
insufficient
PIBs.
Therefore,
there
remain
outstanding
issues
advance
commercial
prospects
PIB
technology.
This
Roadmap
highlights
up-to-date
scientific
technological
advances
insights
into
solving
challenging
accelerate
development
We
hope
this
aids
wider
community
provides
cross-referencing
other
fast-pacing
landscape.
Small,
Journal Year:
2023,
Volume and Issue:
19(20)
Published: Feb. 17, 2023
Nitrogen
doping
is
an
effective
strategy
to
improve
potassium
ion
storage
of
carbon
electrodes
via
the
creation
adsorption
sites.
However,
various
undesired
defects
are
often
uncontrollably
generated
during
process,
limiting
effect
on
capacity
enhancement
and
deteriorating
electric
conductivity.
Herein,
boron
element
additionally
introduced
construct
3D
interconnected
B,
N
co-doped
nanosheets
remedy
these
adverse
effects.
This
work
demonstrates
that
incorporation
preferentially
converts
pyrrolic
species
into
BN
sites
with
lower
energy
barrier,
further
enhancing
carbon.
Meanwhile,
conductivity
modulated
conjugation
between
electron-rich
electron-deficient
accelerating
charge-transfer
kinetics
ions.
The
optimized
samples
deliver
a
high
specific
capacity,
rate
capability,
long-term
cyclic
stability
(532.1
mAh
g-1
at
0.05
A
,
162.6
2
over
8000
cycles).
Furthermore,
hybrid
capacitors
using
anode
power
density
excellent
cycle
life.
study
promising
approach
for
adsorptive
in
materials
electrochemical
applications.