Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 30, 2025
Abstract
Li‐rich
Mn‐based
oxide
(LRMO)
are
promising
cathode
candidates
for
next‐generation
Li‐ion
batteries
with
combined
cost‐effectiveness
and
high
specific
capacity.
Designing
Co‐free
LRMO
can
further
leverage
the
low
cost
of
this
class
cathodes
given
capacity
be
maintained.
However,
implementing
cobalt‐free
materials
hampered
by
their
sluggish
kinetics,
resulting
in
poor
rate
performance
that
underperform
compared
Co‐containing
counterparts.
Here,
it
is
confirmed
slow
kinetics
originates
from
structural
disorder
caused
transition
metals
(TMs)
migration
at
voltages
(above
4.5
V
Vs.
Li
+
/Li)
consequent
irreversible
oxygen
redox
process.
Aware
this,
Na
/F
−
introduced
surficial
lattice
to
alleviate
these
issues,
ultimately
achieving
improved
discharge
voltage
(≈0.2
above
1
C,
C
=
0.25
A
g
−1
),
exceptional
cycle
stability
pouch‐type
cell
(95.1%
retention
after
400
cycles
25
°C,
80.9%
300
0.5
45
°C)
excellent
C‐rate
(≈150
mA
h
5
C).
The
newly
developed
gradient
design
unleashes
charge
transfer
limitation
greatly
improves
structure
stability,
consequently
providing
valuable
guidelines
future
high‐capacity
design.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 6, 2024
Abstract
Transition
metal
sulfides
as
anode
materials
for
sodium‐ion
batteries
(SIBs)
have
the
advantage
of
high
capacity.
However,
their
cycle‐life
and
rate
performance
at
ultra‐high
current
density
is
still
a
thorny
issue
that
limit
applicability
these
materials.
In
this
paper,
carbon‐embedded
heterojunction
with
sulfur‐vacancies
regulated
by
ultrafine
bimetallic
(vacancy‐CoS
2
/FeS
@C)
robust
interfacial
C‐S‐Co/Fe
chemical
bonds
successfully
synthesized
explored
an
material
battery.
By
changing
ratio
two
cations,
concentration
anion
sulfur
vacancies
can
be
in‐situ
adjusted
without
additional
post‐treatment.
The
as‐prepared
vacancy‐CoS
@C
offers
ultrahigh
(285.1
mAh
g
−1
200
A
),
excellent
long‐cycle
stability
(389.2
40
after
10000
cycles),
outperforming
all
reported
transition
sulfides‐based
SIBs.
Both
ex‐situ
characterizations
provide
strong
evidence
evolution
mechanism
phases
stable
solid‐electrolyte
interface
(SEI)
on
surface.
functional
theory
calculations
show
constructing
reasonable
significantly
increase
electronic
conductivity.
Notably,
assembled
@C//Na
3
V
(PO
4
)
/C
full‐cell
shows
capacity
226.2
400
cycles
2.0
,
confirming
material's
practicability.
Advanced Energy Materials,
Год журнала:
2024,
Номер
14(31)
Опубликована: Май 21, 2024
Abstract
Low‐cost,
high‐voltage‐platform,
and
high‐capacity
MnO
2
is
the
most
promising
cathode
candidate
for
developing
high‐energy‐density
aqueous
zinc‐ion
batteries.
However,
Buckets
effect
of
runaway
phase
transition
irreversible
dissolution
restricts
electrochemical
performance
.
To
address
this
issue,
report
presents
a
bottom‐up
targeted
assembly
concept
driven
by
Gibbs
free
energy
design
robust
Ni‐MnO
2‐x
F
x
host
via
Ni
2+
pre‐intercalation
coupled
with
fluorine
doping.
The
regulated
coordination
interlayer
reinforcement
interfacial
defect
repair,
which
prevents
“layer‐to‐spinel”
inhibits
during
long‐term
cycling.
As
expected,
provides
superior
H
+
/Zn
storage
across
wide
temperature
range.
A
capacity
180.4
mAh
g
−1
retained
after
1000
cycles
at
,
high
specific
293.9
250
50
°C
144.5
3000
0
0.5
This
work
new
insights
into
stable
battery‐compatible
hosts
batteries
as
well
other
battery
chemistries.
Advanced Energy Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 30, 2024
Abstract
The
development
of
high
energy/power
density
and
long
lifespan
device
is
always
the
frontier
direction
attracts
great
research
attention
in
energy
storage
fields.
Zinc‐ion
capacitors
(ZICs),
as
an
integration
zinc‐ion
batteries
supercapacitors,
have
been
widely
regarded
one
viable
future
options
for
storage,
owing
to
their
variable
system
assembly
method
potential
performance
improvement.
However,
ZICs
still
locate
at
initial
stage
until
now,
how
construct
suitable
systems
different
condition
challenging.
Herein,
recent
advance
rational
design
reviewed
order
related
theory
including
compatible
principle
paradigm.
It
starts
with
a
systematically
summary
fundamental
well
motivation.
Then,
electrode
materials
are
classified
into
capacitor‐type
battery‐type
based
on
mechanism,
strategies
progress
these
two‐type
candidates
comprehensively
discussed,
aiming
reveal
inherent
relationship
between
devices
component
architecture
materials.
Beyond
that,
perspectives
this
emerging
field
also
given,
expecting
guide
construction
high‐performance
practical
applications
boost
its
development.
The
enhancement
of
charge
transfer
and
the
relief
volume
stress
anode
materials
contribute
to
fully
exploiting
electrochemical
performance
for
sodium
ion
storage.
Herein,
a
hollow
carbon
polyhedra
nanoreactor
adhered
with
ZnS-MoS2
heterostructure
tunable
sulfur
vacancy
content
(denoted
as
hp-ZMS-600/700/800)
is
prepared
by
self-assembly
temperature
dependent
sulfurization
procedure.
intimate
heterointerface
moderate
vacancies
provide
fast
ion/electron
channels,
nanoreactors
afford
large
variation
maintain
structural
integrity
during
sodiation/desodiation
process.
Theoretical
calculations
in
situ/ex
situ
characterization
techniques
reveal
both
excellent
electron/ion
diffusion
dynamics
storage
mechanism.
As
result,
optimized
hp-ZMS-700
sodium-ion
batteries
delivers
high
initial
Coulombic
efficiency
96.3%,
capacity
398
mAh
g-1
at
0.1
A
g-1,
good
rate
capability
119.8
5
an
retention
84.6%
after
1000
cycles
2
g-1.
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(32)
Опубликована: Апрель 29, 2024
Abstract
The
high
electronic
conductivity
and
tailorable
structural
properties
of
MXene
materials
make
them
promising
candidates
for
energy
storage.
However,
their
poor
chemical
instability
self‐stacking
effect
greatly
limit
application,
especially
in
aqueous
systems.
Here,
using
a
eutectic
etching
approach,
hydroxylated
borophene
is
used
as
trifunctional
mediator
to
construct
robust
Ti
3
C
2
T
x
‐based
MXene/B
self‐assembled
film
electrodes
zinc‐ion
capacitors
(ZICs).
Due
this
mediator,
the
as‐formed
strong
interfacial
binding
within
heterostructure
can
give
rise
an
integrated
modification
promote
high‐efficiency
interface
One
strengthen
thermodynamic
stability
local
Ti─O
bonds
inhibit
irreversible
degradation
MXene;
two
enlarge
space
electrode
boost
ion
transport;
three
improve
Zn
2+
trapping
ability
without
affecting
migration
on
surface.
Thus,
exhibits
areal
capacitance
(537.9
mF
cm
−2
)
at
current
density
0.2
mA
extraordinary
cycling
1
,
with
99.64%
retention
after
40
000
cycles,
which
far
surpasses
that
most
previous
reports.
This
work
provides
pathway
overcoming
storage
high‐performance
ZICs.
