IET Energy Systems Integration,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 27, 2024
Abstract
Due
to
the
availability
of
zinc
resources,
and
reduced
security
risks,
aqueous
zinc‐ion
batteries
(AZIBs)
are
potential
contenders
for
next‐generation
energy
storage
systems.
With
multi‐scene
application
AZIBs,
temperature
adaptation
electrolytes
poses
a
great
challenge.
However,
electrolyte
is
prone
freezing
in
sub‐zero
environments,
which
leads
undesirable
problems
such
as
ion
transfer
poor
electrode/electrolyte
interface,
resulting
sharp
deterioration
electrochemical
properties
AZIBs
cold
conditions
limited
practical
use
AZIBs.
Antifreeze
modification
strategies
have
gained
popularity
effective
ways
optimise
low‐temperature
behaviour
AZIB.
The
results
recent
studies
systematically
summarised
focusing
on
methods,
principles,
effects
achieved.
Firstly,
authors
describe
mechanism
failure
at
low
temperatures.
Subsequently,
antifreeze
summarised,
including
utilisation
high
salt
content,
design
organic
electrolytes,
adoption
additives,
building
hydrogel
electrolytes.
Finally,
issues
faced
by
temperatures
further
indicated
suggestions
provided
their
future
development.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(41)
Published: Aug. 13, 2024
Abstract
Developing
rechargeable
batteries
with
high
power
delivery
at
low
temperatures
(LT)
below
0
°C
is
significant
for
cold‐climate
applications.
Initial
anode‐free
sodium
metal
(AFSMBs)
promise
LT
performances
because
of
the
de‐solvation
energy
and
smaller
Stokes
radius
Na
+
,
nondiffusion‐limited
plating/stripping
electrochemistry,
maximized
density.
However,
severe
reduction
in
electrolyte
ionic
conductivity
formation
unstable
solid
interphase
(SEI)
hinder
their
practical
applications
LT.
In
this
study,
a
2‐methyltetrahydrofuran‐based
dilute
designed
to
concurrently
achieve
an
anion‐coordinated
solvation
structure
impressive
3.58
mS
cm
−1
−40
°C.
The
dominant
aggregate
solvates
enable
highly
efficient
LT‐resistant
hopping
channels
electrolyte.
Moreover,
methyl‐regulated
electronic
2‐methyltetrahydrofuran
induces
gradient
decomposition
toward
inorganic‐organic
bilayer
SEI
mobility,
composition
homogeneity,
mechanical
robustness.
As
such,
record‐high
Coulombic
efficiency
beyond
99.9%
achieved
even
as‐constructed
AFSMBs
sustain
300
cycles
80%
capacity
maintained,
0.5‐Ah
level
pouch
cell
delivers
85%
over
180
−25
This
study
affords
new
insights
into
formulation
fast
conduction
superior
reversibility
ultralow
temperatures.
Prussian
blue
analogs
(PBAs)
as
cathode
material
for
sodium-ion
batteries
have
attracted
widespread
attention
due
to
their
affordability,
simple
synthesis,
and
high
theoretical
capacity.
Nevertheless,
the
oxidation
of
Fe2+
sodium
loss
lead
poor
electrochemical
properties
which
restrict
practical
use
PBAs.
Herein,
a
coprecipitation
approach
based
on
salt-reduction-assisted
synthesis
was
proposed
construct
high-sodium
The
bisulfite
(NaHSO3)
not
only
effectively
inhibits
but
also
increases
mole
ratio
Na+
in
resulting
products.
optimized
sample
exhibits
excellent
specific
capacity
(131.1
mAh
g-1
at
0.1C),
rate
performance
(103.9
10C),
good
cyclic
(94.8%
retention
after
200
cycles).
Experimental
results
reveal
that
synthesized
with
possesses
improved
diffusion
kinetics
stable
crystal
structure.
In
this
study,
scalable
method
is
introduced
PBAs
further
applications.
