Small,
Journal Year:
2024,
Volume and Issue:
20(31)
Published: March 3, 2024
The
rational
design
of
heterogeneous
catalysts
is
crucial
for
achieving
optimal
physicochemical
properties
and
high
electrochemical
activity.
However,
the
development
new
amorphous-crystalline
heterostructures
significantly
more
challenging
than
that
existing
crystalline-crystalline
heterostructures.
To
overcome
these
issues,
a
coordination-assisted
strategy
can
help
fabricate
an
amorphous
NiO/crystalline
NiCeO
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(20), P. 11883 - 11894
Published: Jan. 1, 2024
Vanadium-based
oxides
are
considered
desirable
cathode
materials
for
aqueous
zinc
ion
batteries
owing
to
their
high
theoretical
specific
capacity
and
open
crystal
structure.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 15, 2024
Abstract
Metal
oxides
with
spinel
structure
have
garnered
increasing
attention
as
promising
alternatives
to
noble
metal‐based
electrocatalysts.
However,
these
electrocatalysts
often
fail
simultaneously
exhibit
high
activity
and
stability
for
both
hydrogen
evolution
reaction
(HER)
oxygen
(OER),
limiting
their
applications
in
electrocatalytic
water
splitting.
Herein,
crystalline/amorphous
heterogeneous
interfaces
are
successfully
introduced
into
NiCo
2
O
4
nanosheets,
which
grown
situ
on
carbon
cloth
(CC),
denoted
‐B‐CC.
The
amorphous/crystalline
heterostructures
combine
the
advantages
of
phases
amorphous
phase
nanosheets
modulates
electron
density,
provides
abundant
single
vacancies
active
sites,
enhances
corrosion
resistance,
while
crystalline
improves
conductivity.
Density
functional
theory
(DFT)
calculations
performed
investigate
influence
surface
vacancy
(SV
)
OER
HER
processes.
NiCo₂O₄‐B‐CC
exhibits
overpotentials
only
26
mV
215
at
a
current
density
10
mA
cm
−2
.
It
excellent
performance
splitting,
achieving
400
an
applied
voltage
2.0
V.
construction
novel
approach
enhancing
metal
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 7, 2025
Abstract
Designing
crystal
structures
that
enable
fast
Li‐ion
transport
is
essential
for
achieving
high
performance
in
oxide
electrodes
low‐temperature
lithium‐ion
batteries
(LT‐LIBs),
especially
micron‐scale
particles.
The
introduction
of
point
defects
considered
to
be
effective
accelerating
local
at
room
temperature,
but
due
the
discontinuity
defects,
enhancement
low
temperatures
remains
verified.
Besides,
understanding
defect
impact
quite
limited.
In
this
study,
a
vanadium
pentoxide
(V
2
O
5
)
cathode
with
abundant
oxygen
vacancies
bulk
phase
successfully
synthesized.
Such
structure
tends
form
continuous
and
channels,
facilitating
deep
lithiation
ultralow
exceptional
rate
capability
impressive
capacitance
retention
(74%
−40
°C
54%
−50
°C).
Remarkably,
an
empirical
relationship
between
storage
oxides
uncovered.
Specifically,
degree
exhibits
two
distinct
trends
depending
on
temperature:
linear
increase
response
vacancy
concentration
above
°C,
exponential
below
threshold.
insights
gained
here
highlight
crucial
role
concentrations
temperatures,
providing
direction
tackling
critical
challenges
battery
technologies.
Energy & environment materials,
Journal Year:
2023,
Volume and Issue:
7(3)
Published: June 13, 2023
Manganese‐based
material
is
a
prospective
cathode
for
aqueous
zinc
ion
batteries
(ZIBs)
by
virtue
of
its
high
theoretical
capacity,
operating
voltage,
and
low
price.
However,
the
manganese
dissolution
during
electrochemical
reaction
causes
cycling
stability
to
be
undesirable.
In
this
work,
heterointerface
engineering‐induced
oxygen
defects
are
introduced
into
heterostructure
MnO
2
(δa‐MnO
)
in
situ
activation
inhibit
batteries.
Meanwhile,
between
disordered
amorphous
crystalline
δa‐MnO
decisive
formation
defects.
And
experimental
results
indicate
that
considerably
inhibited
charge/discharge
cycle.
Theoretical
analysis
indicates
defect
regulates
electronic
band
structure
Mn‐O
bonding
state
electrode
material,
thereby
promoting
electron
transport
kinetics
as
well
inhibiting
Mn
dissolution.
Consequently,
capacity
does
not
degrade
after
100
cycles
at
current
density
0.5
A
g
−1
also
91%
retention
500
1
.
This
study
provides
promising
insight
development
high‐performance
manganese‐based
materials
through
facile
low‐cost
strategy.
ChemSusChem,
Journal Year:
2023,
Volume and Issue:
16(12)
Published: March 31, 2023
Exploration
of
high-performance
aqueous
ammonium-ions
hybrid
supercapacitor
has
attracted
tremendous
research
attention
recently.
Herein,
structural
reconstructed
cobalt-iron
layered
double
hydroxides
(SR-CoFe
LDHs)
featuring
copious
structure
defects
(i.
e.,
oxygen-vacancies,
M-O
bonds,
MOO-
coexistence
Co2+
/Co3+
and
Fe2+
/Fe3+
)
are
reported
as
a
high-capacity
cathode
for
NH4+
storage.
The
resulting
SR-CoFe
LDHs
can
deliver
reversible
capacity
167.9
mAh
g-1
at
0.5
A
,
which
is
3.3
folds
higher
than
that
pristine
CoFe-LDHs.
Ex-situ
experimental
results
theoretical
studies
denote
the
presence
in
CoFe-LDHs
lower
adsorption
energy
induced
electron
delocalization
to
enhance
electrical
conductivity,
rendering
exhibits
excellent
performance
As
proof
concept,
ammonium-ion
been
assembled
with
hierarchical
carbon
anode,
large
specific
capacitance
238.3
F
long
cycle
stability
over
10000
cycles,
high
density
66.2
Wh
kg-1
within
wide
working
voltage
2
V.
Overall,
this
work
offers
some
insights
into
design
storage
also
illustrates
construction
devices
charge
carrier.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
34(3)
Published: Oct. 6, 2023
Abstract
Aqueous
batteries
with
high
safety
and
cost
efficiency
usually
employ
metallic
cations
as
charge
carriers.
Recently,
ammonium
(NH
4
+
)
ion
using
the
nonmetal
NH
a
carrier
exhibit
distinct
electrochemical
features
from
conventional
aqueous
batteries.
Herein,
performances
of
bimetallic
hydroxide
material
are
systematically
studied
different
carriers
in
electrolytes,
including
,
well
monovalent
K
Na
respectively.
Electrochemical
results
indicate
that
storage
process
working
ions
exhibits
higher
discharge
plateau,
smaller
polarization,
larger
capacity
than
Experimental
characterizations
theoretical
calculations
suggest
strong
interaction
between
electrode
material,
low
‐ion
diffusion
barrier
lead
to
these
superior
features.
The
assembled
battery
good
energy
density
123
Wh
kg
(cathode+anode)
−1
at
power
480
W
.
These
fundamental
findings
important
for
developing
safety,
low‐cost,
high‐energy
sustainable
