Nano Letters,
Journal Year:
2024,
Volume and Issue:
24(31), P. 9477 - 9486
Published: July 29, 2024
Capacitive
deionization
(CDI),
renowned
for
its
eco-friendly
and
low-energy
approach
to
water
treatment,
encounters
challenges
in
achieving
optimal
efficiency
cycle
stability
despite
recent
advancements.
In
this
study,
the
CDI
electrodes
were
crafted
with
multilevel
pore
structures
using
modified
cellulose
(MCNF)
porous
activated
MXene
(PAMX),
aiming
impact
of
surface
modification
on
adsorption
efficiency,
stability,
overall
performance.
The
experimental
results
demonstrated
superiority
electrode,
specifically
formulation
integrating
sulfonic
acid-treated
PAMX
(SCNF@PAMX).
This
configuration
exhibited
remarkably
a
higher
desalination
rate
(3.91
mg·g–1·min–1)
enhanced
capacity
(31.24
mg·g–1),
cycling
performance
exceeding
90%.
Density
functional
theory
calculations
underscored
formidable
energy
SCNF
Na+
(2.15
eV),
surpassing
that
other
electrodes.
enhancement
through
charge
modification,
altering
electrostatic
adsorption,
lays
solid
foundation
advancing
more
efficient
durable
seawater
technologies.
Desalination,
Journal Year:
2024,
Volume and Issue:
586, P. 117857 - 117857
Published: June 20, 2024
Capacitive
deionization
(CDI)
is
an
alternative
desalination
technique
for
low-to-moderate
salinity
feeds.
Despite
significant
advances
in
electrode
material
design,
CDI's
thermodynamic
energy
efficiency
(TEE)
remains
low
and
has
become
important
assessing
feasibility
real-world
applications.
Innovative
cell
configurations
are
key
to
improving
TEE;
however,
their
performance
trends
need
be
contextualized,
given
the
scattered
information
that
can
challenging
compare.
This
study
evaluates
various
cells,
including
conventional
CDI,
single-
multi-channel
asymmetric
battery
(BDI).
Using
MoS2
as
a
representative
intercalating
material,
position
of
active
sites
on
composite
electrodes
was
first
optimized.
Hydrothermally-grown
carbon
nanofibers
exhibited
enhanced
charge
transfer
compared
embedded
nanofibers.
Among
tested
using
20
mM
NaCl
single-pass
mode
50%
water
recovery,
BDI
demonstrated
over
3.7
times
higher
TEE
than
setups
50
typical
CDI
while
maintaining
consistent
performance.
benefited
from
combined
effects
electrosorption/intercalation
ion
exchange
membranes
symmetric
conformation,
effectively
utilizing
charge.
These
findings
provide
insights
into
process
engineering
improved
electrochemical
enhancement
intercalation-based
configurations.
