Advanced Energy Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 3, 2024
Abstract
Potassium‐ion
batteries
(PIBs)
are
considered
as
competitive
candidates
for
energy
storage
applications
due
to
their
abundant
resources
and
low
cost.
K
2
Mn[Fe(CN)
6
]
(KMnF)
is
an
ideal
cathode
PIBs
because
of
its
high
theoretical
specific
(≈600
Wh
kg
−1
).
However,
it
suffers
from
severe
Mn
dissolution
complex
phase
transitions
caused
by
Jahn–Teller
distortion,
resulting
in
rapid
capacity
decay.
Here,
a
simple,
controllable
universal
“transition
metal
(TM
2+
)
ion
exchange”
strategy
proposed
modulate
the
surface
lattice
KMnF,
not
only
stabilizing
structure
but
also
maintaining
inherent
capacity.
The
substituted
TM
,
including
Fe
Ni
Cu
or
Co
forming
heterogeneous
protection
layer.
Especially
when
modified
redox‐active
exhibits
144
mAh
g
considerable
density
560
remarkable
retention
(86%
after
1,000
cycles
at
50
mA
71%
5,000
respectively).
surface‐modified
KMnF
proved
be
effective
preventing
formation
tetragonal
distortion.
This
work
provides
simple
high‐energy
Mn‐based
cathode.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(2), С. 2428 - 2437
Опубликована: Янв. 2, 2024
Lithium
batteries
have
been
widely
used
in
our
daily
lives
for
their
high
energy
density
and
long-term
stability.
However,
safety
problems
are
of
paramount
concern
consumers,
which
restricts
scale
applications.
Gel
polymer
electrolytes
(GPEs)
compensate
the
defects
liquid
leakage
lower
ionic
conductivity
solid
electrolytes,
attracted
a
lot
attention.
Herein,
3D
interconnected
highly
porous
structural
gel
electrolyte
was
prepared
with
alginate
dressing
as
host
material,
poly(ethylene
oxide)
(PEO),
commercial
electrolyte.
With
rich
polar
functional
groups
(CH2-CH2-O)
segments
on
matrix,
transportation
Li+
is
faster
uniform;
thus,
formations
lithium
dendrite
were
significantly
inhibited.
The
cycle
stability
symmetrical
Li||Li
modified
composite
(SAA)
greatly
improved,
overpotential
remains
stable
after
more
than
1000
h.
Meanwhile,
under
same
conditions,
performance
unmodified
inferior
overpotentials
nearly
1
V
100
Additionally,
capacity
retention
Li||LiFePO4
SAA
95%
200
cycles,
while
those
others
declined
sharply.
dressing-based
GPEs
can
enhance
mechanical
thermal
PEO-based
GPEs,
provides
an
environmentally
friendly
avenue
electrolytes'
applications
batteries.
Energy & Environmental Science,
Год журнала:
2024,
Номер
17(19), С. 7362 - 7371
Опубликована: Янв. 1, 2024
Ultrasmall
high-entropy
perovskite
fluoride
nanoparticles
impregnated
in
carbon
nanofibers
are
prepared
by
electrospinning
and
pyrolysis.
The
unique
structure
prevents
the
conversion
reaction
shows
a
low-strain
intercalation
mechanism.
Materials Horizons,
Год журнала:
2024,
Номер
11(9), С. 2053 - 2076
Опубликована: Янв. 1, 2024
The
progress
in
the
development
of
layered
metal
oxide
cathodes,
carbon-based
anodes,
and
electrolytes
for
potassium
ion
batteries
is
reviewed.
Specific
suggestions,
concise
perspectives,
strategies
are
provided.
Advanced Energy Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Июль 3, 2024
Abstract
Potassium‐ion
batteries
(PIBs)
are
considered
as
competitive
candidates
for
energy
storage
applications
due
to
their
abundant
resources
and
low
cost.
K
2
Mn[Fe(CN)
6
]
(KMnF)
is
an
ideal
cathode
PIBs
because
of
its
high
theoretical
specific
(≈600
Wh
kg
−1
).
However,
it
suffers
from
severe
Mn
dissolution
complex
phase
transitions
caused
by
Jahn–Teller
distortion,
resulting
in
rapid
capacity
decay.
Here,
a
simple,
controllable
universal
“transition
metal
(TM
2+
)
ion
exchange”
strategy
proposed
modulate
the
surface
lattice
KMnF,
not
only
stabilizing
structure
but
also
maintaining
inherent
capacity.
The
substituted
TM
,
including
Fe
Ni
Cu
or
Co
forming
heterogeneous
protection
layer.
Especially
when
modified
redox‐active
exhibits
144
mAh
g
considerable
density
560
remarkable
retention
(86%
after
1,000
cycles
at
50
mA
71%
5,000
respectively).
surface‐modified
KMnF
proved
be
effective
preventing
formation
tetragonal
distortion.
This
work
provides
simple
high‐energy
Mn‐based
cathode.
