Manganese
(Mn)-based
layer-structured
transition
metal
oxides
are
considered
as
excellent
cathode
materials
for
potassium
ion
batteries
(KIBs)
owing
to
their
low
theoretical
cost
and
high
voltage
plateau.
The
energy
density
cycling
lifetime,
however,
cannot
simultaneously
satisfy
the
basic
requirements
of
market
storage
systems.
One
primary
causes
results
from
complex
structural
transformation
migration
during
intercalation
deintercalation
process.
orbital
electronic
structure
octahedral
center
element
plays
an
important
role
maintaining
integrity
improving
K+
diffusivity
by
introduced
heterogeneous
[Me-O]
chemical
bonding.
A
multitransition
oxide,
P3-type
K0.5Mn0.85Co0.05Fe0.05Al0.05O2
(KMCFAO),
was
synthesized
employed
a
material
KIBs.
Beneficial
larger
layer
spacing
better
accommodate
effectively
preventing
irreversible
in
insertion/extraction
process,
it
can
reach
superior
capacity
retention
up
96.8%
after
300
cycles
at
current
500
mA
g-1.
full
cell
KMCFAO//hard
carbon
exhibits
encouraging
promising
113.8
W
h
kg-1
100
g-1
72.6%
cycles.
Materials,
Journal Year:
2023,
Volume and Issue:
16(21), P. 6869 - 6869
Published: Oct. 26, 2023
Emerging
energy
storage
systems
have
received
significant
attention
along
with
the
development
of
renewable
energy,
thereby
creating
a
green
platform
for
humans.
Lithium-ion
batteries
(LIBs)
are
commonly
used,
such
as
in
smartphones,
tablets,
earphones,
and
electric
vehicles.
However,
lithium
has
certain
limitations
including
safety,
cost-effectiveness,
environmental
issues.
Sodium
is
believed
to
be
an
ideal
replacement
owing
its
infinite
abundance,
low
cost,
friendliness,
behavior
similar
that
lithium.
Inhered
achievement
LIBs,
sodium-ion
(SIBs)
rapidly
evolved
commercialized.
Among
cathode,
anode,
electrolyte,
cathode
remains
challenge
achieving
stable,
high-rate,
high-capacity
device.
In
this
review,
recent
advances
optimization
materials,
inorganic,
organometallic,
organic
discussed
SIBs.
addition,
challenges
strategies
enhancing
stability
performance
SIBs
highlighted.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 17, 2024
Abstract
Rechargeable
magnesium‐ion
batteries
(RMBs)
have
garnered
increasing
research
interest
in
the
field
of
post‐lithium‐ion
battery
technologies
owing
to
their
potential
for
high
energy
density,
enhanced
safety,
cost‐effectiveness,
and
material
resourcefulness.
Despite
substantial
advancements
RMB
research,
a
number
intrinsic
challenges
remain
unresolved,
such
as
strong
Coulombic
interaction
between
Mg
2+
host
crystal
structure
cathode
materials,
sluggish
diffusion
kinetic,
poor
electrolyte
compatibility,
formation
passivation
films
on
anode
interface.
These
issues
hinder
commercial
applications
RMBs.
This
review
provides
comprehensive
overview
progress
key
areas
including
representative
storage
cathode/anode
materials
conducting
electrolytes.
Additionally,
recent
developments
electrode‐electrolyte
interface
regulations
pouch‐cell
fabrication
are
outlined,
highlighting
current
implementation
effective
solutions.
Finally,
future
directions
proposed
guide
development
high‐performance
RMBs
with
practical
applications.
Energy Materials,
Journal Year:
2024,
Volume and Issue:
4(1)
Published: Jan. 11, 2024
An
essential
component
of
a
working
electrode
is
the
conductive
additive:
whether
it
used
in
very
low
amounts
or
constitutes
matrix,
its
electrochemical
response
not
negligible.
Commercially
diffused
carbon
black
species
(i.e.,
Super
P,
C65,
and
C45)
still
lack
an
in-depth
characterisation
emerging
field
potassium-ion
battery
systems,
which
are
on
way
towards
large-scale
stationary
storage
application.
Thus,
this
work
aims
to
provide
strong
tools
discriminate
their
active
role
such
secondary
cells.
First,
effect
pseudo-amorphous
structure
mechanism
potassium
ions,
tend
mainly
adsorb
surface
rather
than
intercalate
within
graphene
layers,
leading
pseudocapacitive
response,
discussed.
Then,
Dunn’s
Trasatti’s
methods
considered
identify
potential
ranges
surface-dominated
reactions
occur,
quantifying
weight
at
same
time.
This
observation
surely
linked
with
properties
exposed
functional
groups;
thus,
X-ray
photoelectron
spectroscopy
exploited
correlate
features
both
pristine
cycled
surfaces
species.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(17), P. 11375 - 11388
Published: April 17, 2024
P2-NaxMnO2
has
garnered
significant
attention
due
to
its
favorable
Na+
conductivity
and
structural
stability
for
large-scale
energy
storage
fields.
However,
achieving
a
balance
between
high
density
extended
cycling
remains
challenge
the
Jahn–Teller
distortion
of
Mn3+
anionic
activity
above
4.1
V.
Herein,
we
propose
one-step
in
situ
MgF2
strategy
synthesize
P2-Na0.76Ni0.225Mg0.025Mn0.75O1.95F0.05
cathode
with
improved
Na-storage
performance
decent
water/air
stability.
By
partially
substituting
cost-effective
Mg
Ni
incorporating
extra
F
O,
optimized
material
demonstrates
both
enhanced
capacity
structure
via
promoting
Ni2+/Ni4+
oxygen
redox
activity.
It
delivers
132.9
mA
h
g–1
an
elevated
working
potential
≈3.48
V
maintains
≈83.0%
retention
after
150
cycles
at
100
within
2–4.3
V,
compared
114.9
3.32
discharging
undoped
Na0.76Ni0.25Mn0.75O2.
While
increasing
charging
voltage
4.5
133.1
3.55
(vs
Na/Na+)
were
achieved
72.8%
cycles,
far
beyond
that
pristine
sample
(123.7
g–1,
3.45
43.8%@100
cycles).
Moreover,
exceptional
low-temperature
is
achieved,
95.0%
cycles.
Finally,
mechanism
samples
employing
various
doping
strategies
was
investigated
using
EIS,
XRD,
ex
XPS
techniques.
ACS Applied Materials & Interfaces,
Journal Year:
2023,
Volume and Issue:
15(41), P. 48277 - 48286
Published: Oct. 6, 2023
Mn-based
layered
oxides
have
been
considered
the
most
promising
cathode
candidates
for
cost-effective
potassium-ion
batteries
(PIBs).
Herein,
equiatomic
constituents
of
Ni,
Fe,
Mg,
and
Ti
introduced
into
transition
metal
layers
oxide
to
design
a
high-entropy
K0.6Ni0.05Fe0.05Mg0.05Ti0.05Mn0.0725O2
(HE-KMO,
S
=
1.17R).
Consequently,
experimental
results
manifest
that
structure
HE-KMO
is
more
stable
than
conventional
low-entropy
K0.6MnO2
(LE-KMO,
0.66R)
during
successive
cycling
even
upon
exposure
moisture.
Diffraction
electrochemical
measurements
reveal
undergoes
solid-solution
mechanism,
contrary
multistage
phase
processes
typically
exemplified
in
K0.6MnO2.
Benefiting
from
stabilized
framework
K+
storage
entropy-stabilized
not
only
demonstrates
exceptional
rate
capability
but
also
shows
excellent
cyclic
stability.
Notably,
capacity
retention
ratio
86%
after
3000
cycles
can
still
be
sustained
at
remarkable
current
density
5000
mA
g-1.
Batteries & Supercaps,
Journal Year:
2022,
Volume and Issue:
6(3)
Published: Dec. 15, 2022
Abstract
As
a
promising
candidates
for
next‐generation
secondary
battery
system,
sodium‐ion
(Na‐ion)
batteries
and
potassium‐ion
(K‐ion)
are
recently
attracting
considerable
attention
because
of
their
cost‐effectiveness
similar
reaction
mechanism
to
that
lithium‐ion
batteries.
However,
the
major
challenges
practical
application
sluggish
ionic
kinetic
with
excessive
volume
change
cathode
material,
caused
by
larger
radius
than
Li
+
ion.
The
current
demand
high
energy
density
is
not
satisfactory
electrochemical
properties
materials
Na‐ion
K‐ion
studied
so
far,
but
extensive
studies
have
been
conducted
achieve
large
reversible
capacity,
power
long
life
in
recent
years.
This
review
provides
comprehensive
information
on
material
reported
date
batteries,
particular
focus
various
strategies
each
properties.
In
this
regard,
diverse
compared
Li‐ion
systems,
future
research
directions
discussed
along
related
prospects.