Abstract
Aqueous
rechargeable
potassium‐ion
batteries
have
considerable
advantages
and
potentials
in
the
application
of
large‐scale
energy
storage
systems,
owing
to
its
high
safety,
abundant
potassium
resources,
environmental
friendliness.
However,
practical
applications
are
fraught
with
numerous
challenges.
Identification
suitable
cathode
materials
mechanisms
great
significance.
Herein,
an
aqueous
battery
comprising
Prussian
blue
analogs
(K
1.15
Fe[Fe(CN)
6
]·1.36H
2
O)
perylene‐3,4,9,10‐tetracarboxylic
anode
is
designed,
which
delivers
a
density
52.0
Wh
kg
−1
excellent
cycling
stability
capacity
retention
84.5%
after
4000
cycles.
Importantly,
synergistic
study
relationships
among
crystal
structure,
spin
state,
kinetics,
electrochemical
performances
thoroughly
conducted.
By
employing
situ
ex
characterizations,
mechanism
comprehensively
elucidated
from
multiple
perspectives.
Prussian
blue
analogues
(PBAs)
have
emerged
as
highly
promising
cathode
materials
for
sodium-ion
batteries
(SIBs)
due
to
their
affordability,
facile
synthesis,
porous
framework,
and
high
theoretical
capacity.
Despite
considerable
potential,
practical
applications
of
PBAs
face
significant
challenges
that
limit
performance.
This
review
offers
a
comprehensive
retrospective
analysis
PBAs'
development
history
materials,
delving
into
reaction
mechanisms,
including
charge
compensation
ion
diffusion
mechanisms.
Furthermore,
overcome
these
challenges,
range
improvement
strategies
are
proposed,
encompassing
modifications
in
synthesis
techniques
enhancements
structural
stability.
Finally,
the
commercial
viability
is
examined,
alongside
discussions
on
advanced
methods
existing
concerns
regarding
cost
safety,
aiming
foster
ongoing
advancements
SIBs.
Nano-Micro Letters,
Год журнала:
2024,
Номер
17(1)
Опубликована: Окт. 4, 2024
Abstract
Na
3
V
2
(PO
4
)
(NVP)
has
garnered
great
attentions
as
a
prospective
cathode
material
for
sodium-ion
batteries
(SIBs)
by
virtue
of
its
decent
theoretical
capacity,
superior
ion
conductivity
and
high
structural
stability.
However,
the
inherently
poor
electronic
sluggish
diffusion
kinetics
NVP
give
rise
to
inferior
rate
performance
unsatisfactory
energy
density,
which
strictly
confine
further
application
in
SIBs.
Thus,
it
is
significance
boost
sodium
storage
material.
Up
now,
many
methods
have
been
developed
optimize
electrochemical
In
this
review,
latest
advances
optimization
strategies
improving
are
well
summarized
discussed,
including
carbon
coating
or
modification,
foreign-ion
doping
substitution
nanostructure
morphology
design.
The
highlighted,
involving
Na,
V,
PO
3−
sites,
include
single-site
doping,
multiple-site
single-ion
multiple-ion
so
on.
Furthermore,
challenges
prospects
high-performance
also
put
forward.
It
believed
that
review
can
provide
useful
reference
designing
developing
toward
large-scale
ACS Nano,
Год журнала:
2024,
Номер
18(29), С. 18834 - 18851
Опубликована: Июль 12, 2024
Given
the
pressing
depletion
of
lithium
resources,
sodium-ion
batteries
(SIBs)
stand
out
as
a
cost-effective
alternative
for
energy
storage
solutions
in
near
future.
Layered
transition
metal
oxides
(LTMOs)
emerge
leading
cathode
materials
SIBs
due
to
their
superior
specific
capacities
and
abundant
raw
materials.
Nonetheless,
achieving
long-term
stability
LTMOs
remains
challenge
inevitable
structural
degradation
during
charge–discharge
cycles.
The
complexity
diversity
cation
configurations/superstructures
within
layers
(TMO2)
further
complicate
understanding
newcomers.
Therefore,
it
is
critical
summarize
discuss
factors
available
strategies
enhancing
LTMOs'
stability.
In
this
review,
cationic
configurations
TMO2
are
introduced
from
crystallographic
perspective.
It
then
identifies
examines
four
key
responsible
decay,
alongside
impacts
various
modification
strategies.
Finally,
more
effective
practical
research
approaches
investigating
have
been
proposed.
work
aims
enhance
comprehension
deterioration
facilitate
substantial
improvement
cycle
life
density.
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.
Nano-Micro Letters,
Год журнала:
2025,
Номер
17(1)
Опубликована: Янв. 31, 2025
Abstract
Potassium-ion
batteries
(PIBs)
are
considered
as
a
promising
energy
storage
system
owing
to
its
abundant
potassium
resources.
As
an
important
part
of
the
battery
composition,
anode
materials
play
vital
role
in
future
development
PIBs.
Bismuth-based
demonstrate
great
potential
for
storing
ions
(K
+
)
due
their
layered
structure,
high
theoretical
capacity
based
on
alloying
reaction
mechanism,
and
safe
operating
voltage.
However,
large
radius
K
inevitably
induces
severe
volume
expansion
depotassiation/potassiation,
sluggish
kinetics
insertion/extraction
limits
further
development.
Herein,
we
summarize
strategies
used
improve
properties
various
types
introduce
recent
advances
design
fabrication
favorable
structural
features
bismuth-based
materials.
Firstly,
this
review
analyzes
working
mechanism
advantages
disadvantages
storage.
Then,
this,
manuscript
focuses
summarizing
modification
including
morphological
design,
compositing
with
other
materials,
electrolyte
optimization,
elucidating
modifications
enhancing
performance.
Finally,
outline
current
challenges
PIBs
put
forward
some
prospects
be
verified.
Journal of the American Chemical Society,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 6, 2025
The
decomposition
of
LiPF6
in
nonaqueous
battery
electrolytes
is
a
well-studied,
deleterious
process
that
leads
to
hydrofluoric
acid
(HF)
driven
transition
metal
dissolution
at
the
positive
electrode
and
gas
production
(H2)
anode,
often
attributed
inherent
moisture
sensitivity
hexafluorophosphate
anion.
In
this
work,
we
use
situ
nuclear
magnetic
resonance
(NMR)
spectroscopy
demonstrate
rate
PF6-
hydrolysis
significantly
decreases
Na
K
systems,
where
Lewis
acidity
cation
dictates
according
Li+
>
Na+
K+.
Despite
remarkable
stability
electrolytes,
show
they
are
still
susceptible
presence
protons,
which
can
catalyze
breakdown
PF6-,
indicating
these
chemistries
not
immune
from
when
paired
with
solvent/cathode
combinations
generate
H+
high
voltage.
Quantitative
multinuclear
multidimensional
NMR
decomposed
shows
after
long-term
degradation,
systems
contain
HF,
HPO2F2,
H2PO3F
as
well
variety
defluorinated
byproducts,
such
organophosphates
phosphonates,
structurally
similar
herbicides/insecticides
may
pose
health
environmental
risks.
Taken
together,
results
have
important
implications
for
Na-
K-ion
batteries
hazardous
harmful
byproducts
like
soluble
metals,
organophosphates,
phosphonates
be
greatly
reduced
through
cell
design.
Our
also
suggest
next-generation
present
pathway
safer
lower
quantities
flammable
gases,
H2,
if
properly
engineered.
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 13, 2024
Abstract
Potassium
metal
batteries
(PMBs)
are
promising
for
next‐generation
energy
storage.
However,
the
high
reactivity
of
anode
causes
instability
in
solid
electrolyte
interface
(SEI),
resulting
Volmer‐Weber
(V‐W)
type
deposition.
To
achieve
uniform
Frank‐van
der
Merwe
(F‐M)
deposition,
entropy
alloy
nanoparticles
designed
(HEA
NPs)
with
equimolar
ratios
Mn,
Fe,
Co,
Cu,
and
Ni
to
enhance
substrate‐K
interface.
HEA
NPs
K
affinity
N‐doped
nanocarbon
fiber
substrate
(N‐PCNF)
maximize
ion
electron
transport
efficiency.
The
dendrite‐free
horizontal
growth
confirmed
through
Operando
X‐ray
diffraction
(XRD)
optical
microscopy
(OM).
Consequently,
asymmetric
cell
exhibits
ultra‐long
cycling
stability
2350
hours
at
a
current
density
8
mA
cm
−2
.
full
composed
molten
diffusion
into
decorated
N‐PCNF
perylene‐3,4,9,10‐tetracarboxylic
dianhydride
cathode
(HEA‐N‐PCNF‐K||PTCDA)
delivers
an
331
W
h
kg
−1
remains
stable
over
2000
cycles.
This
study
offers
pathway
innovative
PMBs
designs
broad
application
prospects.