ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(50), P. 69133 - 69141
Published: Oct. 10, 2024
Gas
evolution
reactions
in
aqueous
zinc
metal
batteries
(AZMBs)
cause
gas
accumulation
and
battery
swelling
that
negatively
affect
their
performance.
However,
previous
work
often
reported
hydrogen
as
the
main,
if
not
only,
species
evolved
AZMBs;
complexity
of
has
been
overlooked.
For
first
time,
this
found
CO2
reaction
(CER)
AZMBs,
pinpointed
its
sources,
identified
electrolyte
modulation
strategies.
Using
differential
electrochemical
mass
spectrometry,
CER
was
detected
V2O5||Zn
full
cells,
instead
asymmetric
Cu||Zn
it
became
substantial
when
being
charged
to
2.0
V.
By
using
a
carbon
isotope
tracing
method,
primary
origin
corrosion
conductive
at
cathode.
Among
six
representative
electrolytes,
weakly
solvating
(3
m
Zn(OTf)2
acetonitrile/water)
presented
high
resistance
by
reducing
water
disturbing
bonding.
This
sheds
light
on
interfacial
parasitic
for
practical
(Zn
Al)
batteries.
Chemical Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Silicon
(Si)
is
considered
a
promising
anode
material
for
next-generation
lithium-ion
batteries
due
to
its
high
theoretical
specific
capacity
and
earth-abundancy.
However,
challenges
such
as
significant
volume
expansion,
unstable
solid
electrolyte
interphase
(SEI)
formation
in
incompatible
electrolytes,
slow
transport
lead
poor
cycling
rate
performance.
In
this
work,
it
demonstrated
that
superior
cyclability
capability
of
Si
anodes
can
be
achieved
using
ethyl
fluoroacetate
(EFA)
fluoroethylene
carbonate
(FEC)
solvents
with
low
binding
energy
Li+
but
sufficiently
relative
dielectric
constants.
By
weakening
the
interaction
between
solvent,
barrier
desolvation
process
lowered,
while
ensuring
conductivity
diffusion
Li+.
As
result,
silicon-carbon
optimized
exhibits
excellent
performance,
work
reversibly
1709.1
mAh
g-1
proceeds
over
250
cycles
retains
85.2%
at
0.2C.
Furthermore,
Si/C‖LiFePO4
(LFP)
full
cell
shows
an
extended
service
life
more
than
500
cycles.
This
offers
valuable
insights
into
design
weakly
solvating
electrolytes
high-performance
Si-based
batteries.
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 1, 2024
Abstract
The
issues
of
active
iodine
dissolution
and
polyiodide
shuttle
severely
hinder
the
development
zinc‐iodine
batteries
(ZIBs).
Binder
engineering
is
considered
a
valid
strategy
to
kill
two
birds
with
one
stone.
Herein,
sodium
lignosulfonate
(LS),
an
important
derivative
lignin,
optimized
as
neotype
binder
for
fabrication
iodine‐loading
cathode.
Owing
existence
‐SO
3
Na
group,
electrostatic
potential
LS
molecule
contains
both
negative
positive
regions,
which
prefer
block
behavior
through
repulsion
effect,
adsorb
polyiodides
attraction
respectively.
Meanwhile,
holds
more
Gibbs
free
energies
consecutive
radical
reaction,
much
stronger
adsorption
species,
manifesting
fast
conversion
reaction
kinetics,
effective
inhibition
behavior.
As
expected,
ZIBs
based
on
delivers
high
capacity
153.6
mAh
g
−1
after
400
cycles
at
0.1
A
,
reversible
152.8
500
0.5
(50
°C),
durable
cycling
stability
12000
5
implying
excellent
fixation
ability
binder.
This
work
guides
design
special
iodine‐based
electrodes
facilitates
practical
application
ZIBs.
ACS Nano,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 5, 2025
Conversion-type
transition
metal-based
materials
(MZx)
are
considered
promising
cathodes
for
lithium
metal
batteries
due
to
their
low
cost,
abundant
availability,
and
high
theoretical
energy
density.
However,
they
suffer
from
rapid
capacity
decay
caused
by
the
transformation
into
two
inhomogeneous
phases
during
discharge.
Herein,
we
use
a
pulse
current
discharge
activation
method
(under
3C)
induce
homogeneous
phase
nucleations.
As
result,
microsized
FeS2
cathode
transforms
mixture
of
nanosized
Fe
Li2S,
effectively
mitigating
volume
expansion.
It
exhibits
exceptional
cycling
performance,
delivering
specific
572.8
mAh
g–1
after
800
cycles
at
0.33C.
Even
areal
5.4
cm–2,
it
undergoes
180
with
retention
89.3%
This
work
highlights
crucial
role
nucleation
in
achieving
long
life
conversion-type
cathodes.
Pyrite
FeS2,
recognized
as
a
promising
conversion-type
cathode
material
for
high-energy-density
batteries,
encounters
rapid
decline
in
capacity
due
to
the
polysulfide
shuttle
effect.
To
tackle
these
challenges,
this
study
introduces
nonflammable
locally
concentrated
ionic
liquid
electrolyte
(LCILE)
composed
of
lithium
bis(fluorosulfonyl)imide
(LiFSI),
1-vinylpropyl-3-methylimidazolium
bis(trifluoromethylsulfonyl)imide
(AMImTFSI),
and
1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl
ether
(TTE).
This
manifests
tailored
solvation
structure
with
FSI-TFSI
dual-anion-dominated
aggregates
(AGGs),
which
effectively
mitigates
effect
polysulfides
fosters
formation
robust
dual-anion-derived
cathode-electrolyte
interphase
(CEI)
on
FeS2
cathode.
Consequently,
Li/FeS2
battery
sustains
627
mAh
g-1
after
200
cycles
high
retention
rate
90%,
significantly
bolsters
cyclic
stability
research
offers
insight
into
design
advanced
electrolytes
future
batteries.
