A
single-phase
layer-structured
high
entropy
oxide
O3-Na(MgCu)1/12(NiCoFeMnTi)1/6O2
(HEO-MgCuNi)
has
been
synthesized
and
investigated
as
cathode
in
sodium
ion
battery.
The
as-synthesized
delivers
a
discharge
capacity
of
146.6
mAh
g-1
at
10
mA
g-1,
can
retain
83.2%
after
700
cycles
100
between
2.0
4.1
V
vs.
Na+/Na.
reversible
O3-P3
phase-transition
takes
place
during
the
charge/discharge
process.
In
addition,
electronic
local
structures
electrochemical
active
centres
(Ni,
Cu,
Co,
Fe)
are
enormously
reversible.
Particularly,
highly
Fe3+/Fe4+
redox
was
revealed
by
X-ray
absorption
fine
structure
(XAFS).
Meanwhile,
Mn
Ti
stabilize
layered
without
alternation
their
oxidation
states.
crystal
structure,
synergistically
enable
HEO-MgCuNi
long
cycle
life.
Chemical Engineering Journal,
Journal Year:
2024,
Volume and Issue:
495, P. 153471 - 153471
Published: June 25, 2024
The
rising
demand
for
sodium-ion
batteries
(SIBs)
in
commercial
applications
emphasizes
the
importance
of
meeting
criteria.
Despite
their
potential,
SIBs
encounter
challenges
related
to
specific
energy,
cycling
life,
and
power
due
unique
characteristics
sodium
ions.
Design
strategies,
surface
engineering,
structural
modifications
cathode
materials
have
been
devised
improve
electrochemical
performance
SIBs.
In
SIBs,
energy
density
primarily
depends
on
choice
materials.
Common
nowadays
include
transition
metal
oxides,
polyanionic
compounds,
Prussian
blue
analogs
(PBAs).
Enhancing
these
through
targeted
overcome
limitations
is
crucial
transitioning
them
from
lab-scale
practical
use.
However,
there
are
still
some
address
before
can
be
effectively
utilized
large-scale
storage
Recycling
spent
poses
significant
economic
environmental
challenges,
particularly
compared
lithium-ion
(LIBs).
progress
materials,
thorough
assessments
detailed
inventory
data
lacking
early
stage
development
restricts
recycling
underscoring
significance
end-of-life
treatment.
Pyrometallurgy
hydrometallurgy
commonly
employed
recovery,
with
pyrometallurgy
favored
reduced
evaporation
risks.
marketing
commercialization
trends
reflect
growing
renewable
solutions.
potential
grid-scale
storage,
expected
support
expansion
infrastructure.
overcoming
technological
reducing
costs
key
SIB
commercialization.
this
regard,
startups
playing
a
role
advancing
technologies
applications.
collaboration
between
companies
advancements
manufacturing
facilities
driving
production,
marking
substantial
towards
This
paper
aims
provide
comprehensive
review
current
research
technology.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 29, 2024
Abstract
Since
the
electrochemical
de/intercalation
behavior
is
first
detected
in
1980,
layered
oxides
have
become
most
promising
cathode
material
for
alkali
metal‐ion
batteries
(Li
+
/Na
/K
;
AMIBs)
owing
to
their
facile
synthesis
and
excellent
theoretical
capacities.
However,
inherent
drawbacks
of
unstable
structural
evolution
sluggish
diffusion
kinetics
deteriorate
performance,
limiting
further
large‐scale
applications.
To
solve
these
issues,
novel
strategy
high
entropy
has
been
widely
applied
oxide
cathodes
AMIBs
recent
years.
Through
multielement
synergy
stabilization
effects,
high‐entropy
(HELOs)
can
achieve
adjustable
activity
enhanced
stability.
Herein,
basic
concepts,
design
principles,
methods
HELO
are
introduced
systematically.
Notably,
it
explores
detail
improvements
on
limitations
oxides,
highlighting
latest
advances
materials
field
AMIBs.
In
addition,
introduces
advanced
characterization
calculations
HELOs
proposes
potential
future
research
directions
optimization
strategies,
providing
inspiration
researchers
develop
areas
energy
storage
conversion.
SusMat,
Journal Year:
2024,
Volume and Issue:
4(4)
Published: May 30, 2024
Abstract
High‐entropy
materials
(HEMs)
have
recently
attracted
extensive
research
interest.
Featuring
unique
structural
characteristics
and
excellent
mechanical/chemical
properties,
HEMs
(especially
high‐entropy
alloys
oxides)
emerge
as
promising
electrode
for
electrochemical
energy
storage.
We
herein
present
a
critical
review
to
update
the
recent
progress
in
developing
new
electrodes
various
metal‐ion
batteries.
Their
design
principle
is
discussed
along
with
preparation,
characterization,
performance
materials.
The
current
state‐of‐the‐art
HEM
presented,
covering
good
capacity,
rate
long‐term
cycle
stability
ion
By
addressing
both
success
challenges
associated
development,
this
contributes
efforts
toward
achieving
higher
capacity
more
stable
Nano Letters,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 10, 2025
The
growing
market
for
sodium-ion
batteries
has
stimulated
interest
in
research
on
Prussian
blue-type
cathode
materials.
Iron
hexacyanoferrate
(FeHCF)
is
considered
a
desirable
cathode,
but
the
incomplete
electrochemical
property
of
its
low-spin
iron
sites
hinders
further
practical
application.
In
this
paper,
carboxymethyl
cellulose
demonstrated
to
have
an
appropriate
binding
energy
through
DFT
calculations,
synthesize
blue
situ,
balance
Fe3+
and
water
FeHCF,
introduce
FeIII
vacancies
activate
Fe
sites.
Thus,
at
1
C
rate,
it
achieves
initial
discharge
capacity
154.7
mAh
g–1
with
density
470.8
Wh
kg–1.
retention
70.2%
after
4000
cycles
rate
100
C.
This
work
provides
simpler
way
develop
more
cost-effective,
faster,
durable
materials
storage.
