Carbon
fiber
(CF)
based
flexible
supercapacitors
have
good
prospects
in
the
application
of
next-generation
wearable
energy
storage
devices
due
to
their
lightweight,
high
flexibility,
and
conductivity.
However,
subjected
inert
surface,
small
specific
surface
area,
poor
electrochemical
activity,
difficulty
loading
active
materials,
carbon
has
hindered
its
practical
application.
Constructing
a
porous
conductive
substrate,
improving
local
electronic
structure,
increasing
sites
can
effectively
solve
above
problems.
Herein,
we
reported
simple
method
sequentially
constructing
B,
N
co-doped
(BNC)
NiCo2O4
nanoneedles
(NCO)
with
two
forms
B
atom
doping
on
CF
surface.
Its
unique
structure
shortened
migration
path
ions
for
high-power
electrode
providing
highly
distributed
fast
charge
transfer
capabilities.
The
B-NCO@BNC/CC
exhibited
excellent
mass-specific
capacitance
up
2015.8
F
g-1
at
current
density
0.5
A
g-1.
This
result
is
attributed
increase
effective
contact
area
between
material
collector.
resulting
B-NCO@BNC/CF//BNC/CF
all-solid-state
(FASCs)
achieved
output
86.7
Wh
kg-1
long-term
durability
(with
capacitor
retention
rate
95%
after
30,00
cycles
charging
discharging).
work
proposes
low-cost
way
fabricate
hierarchically
structured
electrodes
CF-based
supercapacitors.
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(28), С. 17213 - 17221
Опубликована: Янв. 1, 2024
The
ultrathin
size
of
SNVO
with
oxygen
vacancies
and
more
active
sites
improved
the
diffusion
ability
Zn
2+
ions.
exhibits
excellent
cycle
stability,
retaining
94.6%
its
capacity
after
1000
cycles
at
10
A
g
−1
.
Abstract
Aqueous
Zn‐ion
battery
(AZIB)
is
a
new
type
of
secondary
developed
in
recent
years.
It
has
the
advantages
high
energy
density,
power
efficient
and
safe
discharge
process,
non‐toxic
cheap
materials,
simple
preparation
etc.,
application
prospects
emerging
large‐scale
storage
fields
such
as
electric
vehicles
grids.
Currently,
one
main
factors
hindering
further
development
AZIBs
batteries
lack
suitable
cathode
materials.
This
article
briefly
introduces
mechanisms
aqueous
zinc‐ion
batteries.
Based
on
crucial
role
materials
AZIBs,
several
common
(such
manganese‐based
compounds,
vanadium‐based
nickel/cobalt‐based
lithium/sodium
intercalated
compounds)
are
reviewed,
strategies
to
improve
their
conductivity
cycling
stability
summarized,
focusing
modification
structural
regulation,
nanoengineering,
doping
modification,
compounding
with
high‐conductivity
The
also
points
out
key
directions
for
future.
Chemical Communications,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
Mn-based
materials
are
considered
as
promising
cathode
candidates
for
aqueous
Zn-ion
batteries
(AZIBs).
Herein,
Mg2+
incorporation
is
developed
to
stabilize
MnO,
which
can
promote
the
reaction
kinetics
and
improve
electrochemical
performance.
In
addition,
Mg-doped
MnO
exhibits
80.7
mA
h
g-1
reversible
capacity
after
2000
cycles
even
at
a
high
rate
of
2
A
g-1.
ACS Applied Nano Materials,
Год журнала:
2024,
Номер
7(10), С. 11816 - 11826
Опубликована: Май 6, 2024
Adequate
atomic
doping
and
multidimensional
nanostructure
construction
are
two
important
means
to
improve
the
performance
of
supercapacitors.
Herein,
we
proposed
a
simple
method
produce
high-performance
fiber-based
electrodes
by
integrating
B-doped
NiCo2O4
nanoclusters
(B–NCO)
with
B,
N
codoped
porous
carbon
framework
(BNC).
A
3D
structure
enabled
continuous
conductive
path
charge
storage
space,
while
B
atoms
increased
additional
active
sites
hydrophilicity.
Therefore,
BNC
can
not
only
provide
good
interface
conditions
for
B–NCO
growth
reduce
contact
resistance
but
also
be
applied
as
negative
electrode
excellent
performance.
Notably,
formation
tip
effect
enrich
large
number
electrons
at
NCO
nanoclusters,
forming
local
electrostatic
field
effectively
improving
utilization
electrons.
The
different
forms
higher
conductivity
more
sites.
Leveraging
these
attributes,
B–NCO@BNC/CF
exhibited
mass-specific
capacitance
up
2015.8
F
g–1
current
density
0.5
g–1.
resulting
B–NCO@BNC/CF//BNC/CF
achieved
high
energy
output
86.7
Wh
kg–1
long-term
durability.
This
work
proposes
low-cost
effective
way
fabricate
hierarchically
structured
wearable
