Abstract
A
novel
phospho‐based
hydrophobic
deep
eutectic
solvents
(HDESs)
is
proposed
to
selectively
extract
valuable
metals
from
waste
lithium‐ion
batteries
(LIBs).
Under
the
optimized
extraction
conditions,
single‐stage
efficiency
of
HDES
[TOP][Lid]
for
Co
2+
and
Ni
were
98.5%
83.9%,
[TBP][Lid]
96.0%
82.9%,
Li
+
was
enriched
in
extract.
FT‐IR,
1
H
NMR,
ESP
analysis
confirmed
hydrogen
bond
between
HBD
HBA.
The
metal
ion
mechanism
by
HDESs
analyzed
based
on
quantum
chemistry
(QC)
molecular
dynamics
(MD).
at
level
that
electrostatic
coordination
interactions
transition
ions
dominate
(Co
).
interaction
intensity
with
stronger
than
HDESs.
Abstract
All‐solid‐state
lithium‐ion
batteries
(ASSLIBs)
are
attracting
significant
attention
due
to
their
high
energy
density,
conductivity
and
safety.
However,
they
expected
generate
substantial
waste
in
the
near
future,
leading
resource
depletion
environmental
pollution.
Therefore,
it
is
crucial
achieve
green,
mild
safe
recovery
of
ASSLIBs.
Here,
we
for
first
time
use
green
deep
eutectic
solvents
(DESs)
effectively
recover
solid‐state
electrolytes
(SSEs)
from
ASSLIBs
at
temperature.
Results
show
that
Li
leaching
efficiency
can
reach
up
87.5
%
with
a
superhigh
Li/La
selectivity
1902
low
temperature
80
°C.
Furthermore,
70
anti‐solvents
screened
recycle
dissolved
SSEs
leachate
12
could
precipitate
room
This
research
opens
new
possibilities
recovering
using
sustainable,
cost‐effective
solvents.
Molecules,
Год журнала:
2024,
Номер
29(19), С. 4545 - 4545
Опубликована: Сен. 25, 2024
The
room
temperature
ionic
liquid
trihexyl(tetradecyl)phosphonium
decanoate
([P66614][Dec])
was
employed
in
the
liquid-liquid
extraction
of
Co(II)
from
hydrochloric
acid
solutions
presence
Ni(II).
performance
separations
showed
a
strong
dependence
on
content
feed
aqueous
solution.
best
terms
extracted
cobalt
and
selectivity
obtained
when
contained
HCl
concentration
above
6
M
On
contrary,
experiment
performed
absence
HCl,
lower
Co/Ni
were
obtained.
This
behavior
has
been
rationalized
by
considering
protonation
[Dec]−
anion
different
Co(II)/Ni(II)
speciation
media.
Moreover,
polymer
inclusion
membranes
(PIMs)
prepared
using
PVC
[P66614][Dec]
at
weight
rations.
Only
PIM
formulated
with
30:70/PVC:[P66614][Dec]
ratio
demonstrated
effective
efficiency
comparable
to
that
biphasic
experiments
8
HCl.
results
this
study
constitute
promising
background
for
further
practical
developments
carboxylate-based
ILs
applied
separations.
Abstract
A
novel
phospho‐based
hydrophobic
deep
eutectic
solvents
(HDESs)
is
proposed
to
selectively
extract
valuable
metals
from
waste
lithium‐ion
batteries
(LIBs).
Under
the
optimized
extraction
conditions,
single‐stage
efficiency
of
HDES
[TOP][Lid]
for
Co
2+
and
Ni
were
98.5%
83.9%,
[TBP][Lid]
96.0%
82.9%,
Li
+
was
enriched
in
extract.
FT‐IR,
1
H
NMR,
ESP
analysis
confirmed
hydrogen
bond
between
HBD
HBA.
The
metal
ion
mechanism
by
HDESs
analyzed
based
on
quantum
chemistry
(QC)
molecular
dynamics
(MD).
at
level
that
electrostatic
coordination
interactions
transition
ions
dominate
(Co
).
interaction
intensity
with
stronger
than
HDESs.
