ACS Applied Energy Materials,
Год журнала:
2023,
Номер
6(6), С. 3225 - 3235
Опубликована: Март 8, 2023
This
study
presents
a
low-cost
and
straightforward
α-MnSe-nanorod
(NR)
cathode
active
material
(CAM)
with
superior
function
in
rechargeable
aqueous
zinc-ion
batteries
(AZIBs).
The
facile
two-dimensional
Zn2+
transport
channels,
tunnel
type,
layered
structure
render
such
CAMs
as
the
potential
materials
embedded
AZIBs.
However,
their
practical
usage
has
been
limited
by
either
poor
cycling
stability
or
low
capacity.
We
are
first
to
develop
an
α-MnSe-NR
synthesized
hydrothermal
method
lengths
up
100
nm
diameters
around
30
for
ZIBs,
featuring
large
diameter
of
6.07
Å
interlayer
spacing
0.91
nm.
During
situ
electrochemical
activation
process,
is
electrochemically
oxidized
MnSe
(MnSe-EO).
reflects
higher
storage
capacity
MnSe-EO
cathodes.
Besides,
pseudocapacitive
performance
compared
α-MnO2
gives
rise
much
rate
charge/discharge.
developed
high
reversible
(309
mA
h
g–1)
durable
cyclability
83.4%
retention
after
1000
cycles
at
5
A
g–1.
In
addition,
detailed
coinsertion
process
hydrated
H+/Zn2+
was
conducted,
clarifying
self-regulating
mechanism
electrolyte-involved
production
flake-like
zinc
hydrogen
sulfate.
preferential
embedding
adsorption
energy
ions
were
confirmed
density
functional
theory
analysis,
which
may
further
enhance
migration
abilities
structure,
primarily
responsible
corresponding
performance.
Electrochemical
measurements
favorable
functions
kinetics.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(13)
Опубликована: Янв. 25, 2023
Abstract
With
fast
(de)coordination
kinetics,
the
smallest
and
lightest
proton
stands
out
as
most
ideal
charge
carrier
for
aqueous
Zn‐organic
batteries
(ZOBs).
Hydrogen‐bonding
networks
with
rapid
Grotthuss
conduction
is
particularly
suitable
organic
cathodes,
yet
not
reported.
We
report
supramolecular
self‐assembly
of
cyanuric
acid
1,3,5‐triazine‐2,4,6‐triamine
into
superstructures
through
in‐plane
H‐bonds
out‐of‐plane
π‐π
interaction.
The
exhibit
highly
stable
lock‐and‐key
H‐bonding
an
ultralow
activation
energy
protonation
(0.09
eV
vs.
0.25
zincification).
Then,
high‐kinetics
H
+
coordination
prior
to
Zn
2+
protophilic
C=O
sites
via
a
two‐step
nine‐electron
reaction.
assembled
ZOBs
show
high‐rate
capability
(135
mAh
g
−1
at
150
A
),
high
density
(267
Wh
kg
cathode
)
ultra‐long
life
(50
000
cycles
10
becoming
state‐of‐the‐art
in
comprehensive
performances.
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(8)
Опубликована: Янв. 5, 2024
Abstract
The
practical
implementation
of
aqueous
zinc‐iodine
batteries
(ZIBs)
is
hindered
by
the
rampant
Zn
dendrites
growth,
parasite
corrosion,
and
polyiodide
shuttling.
In
this
work,
ionic
liquid
EMIM[OAc]
employed
as
an
all‐round
solution
to
mitigate
challenges
on
both
anode
iodine
cathode
side.
First,
EMIM
+
embedded
lean‐water
inner
Helmholtz
plane
(IHP)
inert
solvation
sheath
modulated
OAc
−
effectively
repels
H
2
O
molecules
away
from
surface.
preferential
adsorption
metal
facilitates
uniform
nucleation
via
a
steric
hindrance
effect.
Second,
can
reduce
shuttling
hindering
dissolution
forming
‐I
3
dominated
phase.
These
effects
holistically
enhance
cycle
life,
which
manifested
||
symmetric
cells
Zn‐I
full
cells.
ZIBs
with
EAc
deliver
capacity
decay
rate
merely
0.01
‰
per
after
over
18,000
cycles
at
4
A
g
−1
,
lower
self‐discharge
better
calendar
life
than
without
additive.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(38)
Опубликована: Июль 29, 2023
Organic
small
molecules
as
high-capacity
cathodes
for
Zn-organic
batteries
have
inspired
numerous
interests,
but
are
trapped
by
their
easy-dissolution
in
electrolytes.
Here
we
knit
ultrastable
lock-and-key
hydrogen-bonding
networks
between
2,
7-dinitropyrene-4,
5,
9,
10-tetraone
(DNPT)
and
NH4+
charge
carrier.
DNPT
with
octuple-active
carbonyl/nitro
centers
(H-bond
acceptor)
redox-exclusively
accessible
flexible
tetrahedral
ions
donator)
exclude
larger
rigid
Zn2+
,
due
to
a
lower
activation
energy
(0.14
vs.
0.31
eV).
coordinated
H-bonding
chemistry
conquers
the
stability
barrier
of
electrolyte,
gives
fast
diffusion
kinetics
non-metallic
A
stable
two-step
4e-
coordination
cathode
harvests
high
capacity
(320
mAh
g-1
),
high-rate
capability
(50
)
an
ultralong
life
(60,000
cycles).
This
finding
points
new
paradigm
H-bond
stabilized
organic
design
advanced
zinc
batteries.
Advanced Materials,
Год журнала:
2024,
Номер
36(25)
Опубликована: Март 16, 2024
Tunnel-type
vanadium
oxides
are
promising
cathodes
for
aqueous
zinc
ion
batteries.
However,
unlike
layer-type
with
adjustable
layer
distances,
enhancing
ion-transport
kinetics
in
tunnels
characterized
by
fixed
sizes
poses
a
considerable
challenge.
This
study
highlights
that
the
macroscopic
arrangement
of
electrode
crucially
determines
tunnel
orientation,
thereby
influencing
transport.
By
changing
material
morphology,
orientation
can
be
optimized
to
facilitate
rapid
diffusion.
In
proof-of-concept
demonstration,
it
is
revealed
(00l)
facets-dominated
VO
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(16)
Опубликована: Фев. 19, 2024
Bipolar
organics
fuse
the
merits
of
n/p-type
redox
reactions
for
better
Zn-organic
batteries
(ZOBs),
but
face
capacity
plafond
due
to
low
density
active
units
and
single-electron
reactions.
Here
we
report
multielectron
redox-bipolar
tetranitroporphyrin
(TNP)
with
quadruple
two-electron-accepting
n-type
nitro
motifs
dual-electron-donating
p-type
amine
moieties
towards
high-capacity-voltage
ZOBs.
TNP
cathode
initiates
high-kinetics,
hybrid
anion-cation
10e
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(18)
Опубликована: Фев. 21, 2024
In
this
study,
we
introduce
a
novel
approach
for
synthesizing
two-dimensional
(2D)
MXene
heterostructures
featuring
sandwiched
and
cross-linked
network
structure.
This
method
addresses
the
common
issue
of
activity
degradation
in
2D
nanomaterials
caused
by
inevitable
aggregation.
By
utilizing
distinct
surface
characteristics
MXene,
successfully
induced
growth
various
on
substrates.
strategy
effectively
mitigates
self-stacking
defects
augments
exposure
areas.
particular,
obtained
2D-2D
MXene@NiCo-layered
double
hydroxide
(MH-NiCo)
exhibit
enhanced
structural
stability,
improved
chemical
reversibility,
heightened
charge
transfer
efficiency,
outperforming
pure
NiCo
LDH.
The
aqueous
MH-Ni