Small Structures,
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 10, 2024
Prussian
blue
analogues
(PBAs)
are
considered
as
promising
cathode
materials
for
capacitive
deionization
(CDI)
technology
due
to
their
3D
open‐frame
structure
and
tunable
redox
active
sites.
However,
the
inevitably
high
content
of
[Fe(CN)
6
]
vacancies
in
crystal
results
a
low
salt
adsorption
capacity
(SAC)
poor
recycling
performance.
Herein,
high‐salt
nano‐reaction
system
is
established
by
mechanochemical
ball
milling,
enabling
preparation
variety
highly
crystallized
PBAs
(metal
hexacyanoferrate,
MHCF‐B‐170,
M
=
Ni,
Co,
or
Cu)
with
(0.05–0.06
per
formula
unit).
The
reduction
lattice
not
only
strengthens
conductivity
promotes
rapid
transfer
electrons,
but
also
reduces
migration
energy
barrier
accelerates
fast
reversible
diffusion
Na
+
ions.
structural
characterization
method
theoretical
simulation
demonstrates
excellent
reversibility
stability
MHCF‐B‐170
during
CDI
process.
Impressively,
NiHCF‐B‐170
exhibits
performance,
characterized
an
exceptionally
SAC
up
101.4
mg
g
−1
at
1.2
V,
remarkable
cycle
no
significant
degradation
observed
even
after
100
cycles.
This
Fe(CN)
expected
be
competitive
candidate
material
electrodes.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 12, 2024
Abstract
Hybrid
capacitive
deionization
(HCDI)
emerges
as
a
burgeoning
electrochemical
desalination
technology
due
to
the
utilization
of
profitable
pseudocapacitive
reactions.
Although
tunable
organic
compounds
are
potential
faradaic
electrode
materials,
their
insufficient
active
sites
and
high
water‐solubility
restrict
practical
HCDI
applications.
Herein,
polymer
(PNDS)
is
proposed
with
diverse
redox‐active
for
deionization.
The
pronounced
molecular
aromaticity
strong
π‐electron
delocalization
not
only
endow
PNDS
framework
rigidity,
but
refine
its
electronic
structure
bolster
redox
activity
electron
affinity.
As
an
material,
demonstrates
substantial
capacitance
390
F
g
−1
sustains
long‐term
stability
at
96.3%
after
5000
cycles,
surpassing
reported
Na
+
‐capturing
electrodes.
In‐operando
monitoring
techniques
theoretical
calculations
reveal
efficient
capture
C═N
C═O
within
during
repeated
electrosorption
processes.
conceptual
demonstration,
high‐performance
device
equipped
exhibits
impressive
salt
removal
capacity
(66.4
mg
),
rapid
rate
(2.2
min
)
stable
regeneration
property.
More
importantly,
integrated
system
engineered
rapidly
repeatedly
treat
saltwater
resources
human
consumption
agricultural
irrigation,
highlighting
promising
prospects
high‐efficiency
Small,
Journal Year:
2023,
Volume and Issue:
20(21)
Published: Dec. 14, 2023
Abstract
Defect
engineering
is
recognized
as
an
attractive
method
for
modulating
the
electronic
structure
and
physicochemical
characteristics
of
carbon
materials.
Exploiting
heteroatom‐doped
porous
with
copious
active
sites
has
attracted
great
attention
capacitive
deionization
(CDI).
However,
traditional
methods
often
rely
on
utilization
additional
heteroatom
sources
strong
corrosive
activators,
suffering
from
low
doping
efficiency,
insufficient
level,
potential
biotoxicity.
Herein,
hydrogen‐bonded
organic
frameworks
(HOFs)
are
employed
precursors
to
synthesize
N,
O
co‐doped
via
a
simple
green
reverse
defect
strategy,
achieving
controllable
heavy
heteroatoms.
The
co‐doping
triggers
significant
pseudocapacitive
contribution
surface
pore
supports
formation
electric
double
layer.
Therefore,
when
HOF‐derived
used
CDI
electrodes,
superior
salt
adsorption
capacity
32.29
±
1.42
mg
g
−1
outstanding
maximum
rate
10.58
0.46
min
at
1.6
V
in
500
L
NaCl
solution
achieved,
which
comparable
those
state‐of‐the‐art
carbonaceous
electrodes.
This
work
exemplifies
effectiveness
nitrogen‐heavy
strategy
improving
structure,
shedding
light
further
development
rational
designed
electrode
materials
CDI.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(41)
Published: June 7, 2023
Abstract
Solid‐state
energy
storage
devices
(SSESDs)
are
believed
to
significantly
improve
safety,
long‐term
electrochemical/thermal
stability,
and
energy/power
density
as
well
reduce
packaging
demands,
showing
the
huge
application
potential
in
large‐scale
storage.
Nevertheless,
some
key
issues
like
low
ionic
conductivities,
poor
interface
contact,
dendrites
growth
limit
practical
of
SSESDs.
In
recent
years,
MXenes
for
SSESDs
have
received
reassuring
advances
on
account
unique
parameters.
overall
reviews
about
subject
seldom.
this
review,
current
their
derivatives
solid‐state
Li–metal,
Li‐ion,
Li–I/S,
Na‐ion,
Zn–air,
Zn–metal
batteries,
supercapacitors
cathode/anode
optimization,
medication,
electrolyte
fillers,
etc.,
comprehensively
reviewed.
First
all,
essential
principles
shown,
such
precursors,
etching/delamination
strategies,
superior
properties
systems.
Meanwhile,
classification
evaluation
parameters
electrolytes
summarized.
Subsequently,
application,
modification
mechanism,
design
strategy
boosting
electrochemical
behaviors
systematically
reviewed
discussed.
At
last,
perspectives
challenges
future
construction
strategies
recommended.
This
review
shall
assist
scientists
build
advanced
with
along
safety.
