Gel
electrolytes
have
emerged
as
a
promising
solution
for
enhancing
the
performance
of
zinc-ion
batteries
(ZIBs),
particularly
in
flexible
devices.
However,
they
face
challenges
such
low-temperature
inefficiency,
constrained
ionic
conductivity,
and
poor
mechanical
strength.
To
address
these
issues,
this
study
presents
novel
PAMCD
gel
electrolyte
with
tunable
freezing
point
properties
ZIBs,
blending
high
conductivity
polyacrylamide
anion
interaction
capability
β-cyclodextrin.
Leveraging
Hofmeister
effect,
chaotropic
anions
ClO
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(51)
Опубликована: Авг. 29, 2024
Abstract
Aqueous
Zn‐ion
batteries
(AZIBs)
are
promising
for
the
next‐generation
large‐scale
energy
storage.
However,
Zn
anode
remains
facing
challenges.
Here,
we
report
a
cyclodextrin
polymer
(P‐CD)
to
construct
quasi‐single
ion
conductor
coating
and
protecting
anodes.
The
P‐CD
layer
inhibited
corrosion
of
prevented
side
reaction
metal
More
important
is
that
units
enabled
trapping
anions
through
host–guest
interactions
hydrogen
bonds,
forming
elevated
transference
number
(from
0.31
0.68),
suppressed
formation
space
charge
regions
hence
stabilized
plating/striping
ions.
As
result,
Zn//Zn
symmetric
cells
coated
with
achieved
70.6
times
improvement
in
cycle
life
at
high
current
densities
10
mA
cm
−2
mAh
.
Importantly,
Zn//K
1.1
V
3
O
8
(KVO)
full‐cells
mass
loading
cathode
materials
low
N/P
ratio
1.46
reached
capacity
retention
94.5
%
after
1000
cycles
A
g
−1
;
while
cell
without
failed
only
230
cycles.
These
results
provide
novel
perspective
into
control
solid‐electrolyte
interfaces
stabilizing
offer
practical
strategy
improve
AZIBs.
Abstract
The
aqueous
zinc
ion
batteries
(AZIBs)
are
chronically
plagued
by
the
inevitable
side‐reaction
and
uneven
Zn
planets
stack.
Through
regulating
water
activity
2+
crystal
dynamics
could
effectively
relieve
those
anode/electrolyte
interface
problems.
(2‐hydroxypropyl)‐β‐cyclodextrin
(HBCD),
characterized
excluded‐volume
mitigating
zinc‐flux
aggregation
effect,
is
chosen
as
electrolyte
additive
to
tail
interface.
In
this
work,
supermolecule
buffer
layer
conducted
screen
active
modulate
crystallography.
Capitalized
on
intense
electron
density
of
exterior
cavity,
HBCD
molecules
proven
chemically
adsorb
onto
anode,
which
sterically
repulse
waters
disrupt
H‐bonds
among
waters.
Concurrently,
(002)‐preferred
texture
achieved
through
inducing
ions
transport
nucleation.
assembled
symmetric
Zn//Zn
show
ameliorated
lifespan
at
various
current
(350
h
for
10
mA
cm
−2
/10
mAh
100
20
/20
)
steady
operation
73.26%
high
Depth
Discharge
(DOD).
Zn//NVO
deliver
380.4
g
−1
discharge
capacity
1
A
.
To
prove
feasibility,
full
battery
with
a
low
N/P
ratio
(2.16)
assembled,
it
shows
≈260
runs
stably
during
500
cycles.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 18, 2025
Abstract
Zinc
anode
suffers
from
tough
issues
such
as
dendrite,
corrosion,
and
hydrogen
evolution,
which
lead
to
premature
battery
failure
thus
restrict
the
practical
application
of
aqueous
zinc‐metal
batteries
(ZMABs).
Herein,
a
polydentate‐ligand
tactic
is
introduced
reconstruct
solvation
structure,
improve
corrosion
resistance,
trigger
selective
dendrite‐free
deposition
via
β‐Alanyl‐L‐histidine
(AH).
With
abundant
amino,
amide,
carboxyl,
imidazolyl
groups,
AH
shows
chelation
effect,
partially
substitutes
solvated
SO
4
2−
enters
Zn
2+
sheath
facilitate
desolvation.
Those
groups
also
increase
strong
H‐bond
proportion
electrolyte,
stabilizing
water
suppressing
evolution
reactions.
Moreover,
with
multisite
coordination,
preferentially
adsorbs
on
Zn(002)
induce
stable
functional
C,
N,
O,
S‐rich
solid‐electrolyte
interphase
zincophilic
hydrophobic
properties.
It
homogenizes
both
electric
field
concentration
guides
preferential
growth
along
(002),
realizing
anode.
As
result,
obtained
electrolyte
exhibits
high
CE
99.28%,
extended
stability
over
6000
h,
long
lifespan
1000
cycles
for
Zn//MnO
2
batteries.
This
work
offers
novel
design
strategy
additive
toward
stabilization
anodes
ZMABs.
Advanced Energy Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 21, 2025
Abstract
Aggressive
side
reactions
and
dendrite
growth,
associated
with
the
unstable
Zn
anode/electrolyte
interface,
have
impeded
practical
application
of
metal‐based
batteries.
Here,
a
donor‐acceptor
(D‐A)
polymer
is
employed
to
reconstruct
robust
supramolecular
(SP)
protective
layer
achieve
highly
stable
anodes.
The
D‐A
possessing
abundant
electron
donor
acceptor
sites
can
dynamically
co‐crosslink
water
molecules
2
⁺
through
multivalent
dipole
interactions
(MDIs),
resulting
in
formation
network.
MDIs
disrupt
original
strong
hydrogen‐bonding
network
within
polymer,
leading
reconfiguration
chain
conformations
an
increase
intermolecular
free
volume
exposing
more
widely
distributed
dipoles,
thereby
regulating
2+
desolvation
behavior
facilitating
rapid
uniform
plating.
Meanwhile,
resultant
endows
SP
ultra‐high
mechanical
modulus
10.4
GPa,
which
homogenize
stress
distribution
during
plating
process
for
effective
suppression.
Consequently,
SP‐assisted
asymmetric
cell
achieves
nearly
99.94%
Coulombic
efficiency
over
9000
cycles,
enabling
Zn/Zn
cycle
540
h
under
ultrahigh
92%
utilization.
Outstanding
cycling
stability
also
successfully
demonstrated
high
mass‐loading
(≈12.8
mg
cm
−2
)
pouch
cells,
further
demonstrating
its
prospects
applications.
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 9, 2025
Abstract
The
freezing
and
melting
behaviors
of
aqueous
solutions
are
strongly
influenced
by
the
presence
chemical
substances,
yet
criteria
for
screening
effective
chemicals
remain
poorly
defined.
This
study
introduces
a
novel
perspective
to
designing
cold‐resilient
electrolytes
focusing
on
mechanisms
underlying
ice
identifying
key
criteria,
providing
new
insights
into
how
specific
can
enhance
cryogenic
properties
solutions.
A
series
theoretical
experimental
tools
highlight
its
superior
low‐temperature
tolerance
endowed
screened
solute,
pouch
full
cell
Zn//pyrene‐4,5,9,10‐tetraone
with
cathode
loading
up
7.5
mg
cm
−2
delivers
an
impressively
high
capacity
110
mAh
g
−1
excellent
rate
performance
at
−40
°C.
special
work
would
enrich
design
concepts
expand
paradigms
developing
water‐based
energy
storage
systems
in
extreme
environments.
