Carbon Energy,
Год журнала:
2022,
Номер
4(5), С. 986 - 1001
Опубликована: Июнь 20, 2022
Abstract
We
fabricated
sulfur
and
nitrogen
codoped
cyanoethyl
cellulose‐derived
carbons
(SNCCs)
with
state‐of‐the‐art
electrochemical
performance
for
potassium
ion
battery
(PIB)
capacitor
(PIC)
anodes.
At
0.2,
0.5,
1,
2,
5,
10
A
g
−1
,
the
SNCC
shows
reversible
capacities
of
369,
328,
249,
208,
150,
121
mA
h
respectively.
Due
to
a
high
packing
density
1.01
cm
−3
volumetric
are
also
uniquely
favorable,
being
373,
331,
251,
210,
151,
122
at
these
currents,
promising
initial
Coulombic
efficiency
69.0%
extended
cycling
stability
99.8%
capacity
retention
after
1000
cycles.
As
proof
principle,
an
SNCC‐based
PIC
is
tested,
achieving
94.3
Wh
kg
237.5
W
sustaining
over
6000
cycles
30
84.5%
retention.
The
internal
structure
S
N
based
on
highly
dilated
defective
graphene
sheets
arranged
into
nanometer‐scale
walls.
Using
baseline
S‐free
carbon
comparison
(termed
NCC),
role
doping
resultant
was
elucidated.
According
galvanostatic
intermittent
titration
technique
impedance
spectroscopy
analyses,
as
well
COMSOL
simulations,
this
promotes
rapid
solid‐state
diffusion
ions
solid
electrolyte
interphase
that
stable
during
cycling.
X‐ray
diffraction
used
probe
storage
mechanisms
in
SNCC,
establishing
intercalation
presence
KC
36
24,
8
phases
low
voltages.
Chemical Society Reviews,
Год журнала:
2024,
Номер
53(13), С. 7202 - 7298
Опубликована: Янв. 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,
Energy & Environmental Science,
Год журнала:
2021,
Номер
15(1), С. 158 - 168
Опубликована: Ноя. 25, 2021
Sanitary
tissue
is
utilized
as
the
precursor
to
construct
a
hard
carbon
microbelt
paper
(HCMB),
which
can
be
employed
high-initial-coulombic-efficiency
and
low-discharge-platform
K
+
-storage
anode
for
4.5
V
hybrid
capacitors.
ACS Catalysis,
Год журнала:
2022,
Номер
12(7), С. 4002 - 4015
Опубликована: Март 16, 2022
Controllable
designing
of
heteroatom-doped
carbon
catalysts
provides
an
insightful
strategy
for
boosting
the
performance
and
kinetics
oxygen
reduction/evolution
reaction
(ORR/OER).
However,
role
species
is
usually
omitted.
Herein,
a
facile
engineering
proposed
to
tune
in
N-doped
porous
nanofibers
(NPCNFs-O)
via
electrospinning
method,
which
β-cyclodextrin
acts
as
pore
inducer
regulator.
Benefitting
from
large
specific
surface
area
synergistic
effect
N,O
codoping,
NPCNF-O
catalyst
exhibits
superior
ORR
(E1/2
=
0.85
V
vs
reversible
hydrogen
electrode
(RHE))
OER
(Ej
10
1.556
RHE)
activities
with
excellent
stability.
Both
experimental
theoretical
calculations
verify
crucial
carboxyl
groups,
regulate
local
charge
density
reduce
energy
barrier
enhancing
electrocatalytic
activity.
Moreover,
rechargeable
zinc–air
battery
using
air
cathode
demonstrates
maximum
power
125.1
mW
cm–2
long-term
durability.
Importantly,
can
be
served
integrated
freestanding
portable
batteries.
The
work
brings
brilliant
fundamental
insights
constructing
efficient
metal-free
material
future
conversion
storage
systems.
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 Energy Materials,
Год журнала:
2021,
Номер
12(5)
Опубликована: Дек. 23, 2021
Abstract
Potassium
ion
capacitors
(PICs)
have
the
potential
to
combine
advantages
of
and
batteries,
making
them
promising
energy
storage
substitutes
for
existing
systems.
Biomass‐based‐electrodes
are
very
materials
potassium
storage,
however,
at
present,
acquisition
biomass‐based‐electrodes
is
mainly
dependent
on
high
temperature
calcination,
which
makes
efficient
utilization
biomass
quite
challenging.
Herein,
in
accordance
with
ex‐situ
13
C
NMR
Raman,
a
universally
directional
selection
strategy
precursors
through
an
advanced
pre‐diagnosis
method
calcination
intermediates
sulfur
engineering
initially
proposed,
proving
that
carbon
derived
from
fewer
aliphatic
chains
more
aromatic
carbons
show
higher
yield
can
be
K
ions
inserted.
In
addition,
evolution
mechanism
in‐plane/interlayered
CS
bonds
thoroughly
evaluated.
Notably,
PICs
assembled
by
such
as
battery‐type
anode,
deliver
density
151
Wh
kg
‐1
ultrahigh
power
output
10
kW
,
closing
state‐of‐the‐art
values
PICs.
This
breakthrough
opens
up
new
avenue
targeted
design
offers
in‐depth
insights
into
S‐C
bonds,
promoting
energy/power
devices
level.
ACS Nano,
Год журнала:
2022,
Номер
16(12), С. 21443 - 21451
Опубликована: Дек. 9, 2022
The
sulfur
doping
strategy
has
been
attracting
extensive
interest
in
potassium-ion
battery
carbon
anodes
for
the
dual
potential
of
improving
capacity
and
kinetics
anodes.
Understanding
potassium
storage
mechanism
is
crucial
to
guide
structural
design
optimization
high-performance
sulfur-doped
Herein,
presenting
a
laboratory-synthesized
hard
(SHC)
with
content
6.4
at.
%
as
an
example,
we
clarify
reveal
role
storage.
high
SHC
stems
from
selective
substitution
residual
trace
molecular
fragments
after
sulfurization.
As
result,
thanks
multifaceted
roles
doped
storage,
about
twice
much
capacity,
rate
capability,
cycling
stability
achieved
against
S-free
at
same
test
conditions.
Furthermore,
hybrid
capacitors
assembled
based
on
anode
demonstrate
energy/power
density
(139
Wh
kg-1/7.3
kW
kg-1),
along
extraordinary
stability.
