Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 15, 2025
Abstract
Recycling
spent
lithium
iron
phosphate
(LFP)
batteries
is
crucial
for
resource
conservation
and
environmental
sustainability.
However,
the
heterogeneous
nature
of
LFP
materials
presents
challenges
universal
recycling
solutions.
This
work
proposes
an
oxidation‐reduction
process
to
regenerate
cathode
materials,
reconstructing
their
lattice
structure
through
high‐energy
sanding
spray
drying.
The
regenerated
exhibits
uniform
elemental
distribution,
regular
spherical
morphology,
excellent
electrochemical
performance.
initial
capacity
144.9
mAh
g
−1
at
1C
with
98%
retention
after
400
cycles.
Additionally,
material
maintains
135.4
2C,
97%
Density
functional
theory
(DFT)
calculations
confirm
that
removing
Fe
2+
defects
enhances
Li
+
diffusion,
improving
Compared
traditional
hydrometallurgical
pyrometallurgical
methods,
low‐cost,
less
polluting,
offers
a
profit
2.45
$
kg
.
method
enables
large‐scale,
homogeneous
while
maintaining
high
not
only
provides
in‐depth
study
reconstruction
but
also
novel
strategy
on
industrial
scale.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(10)
Published: Jan. 16, 2024
Abstract
Replacing
the
oxygen
evolution
reaction
with
thermodynamically
more
favorable
alternative
oxidation
reactions
offers
a
promising
to
reduce
energy
consumption
of
hydrogen
production.
However,
questions
remain
regarding
economic
viability
for
industrial‐scale
Here,
we
propose
an
innovative
cost‐effective,
environment‐friendly
and
energy‐efficient
strategy
simultaneous
recycling
spent
LiFePO
4
(LFP)
batteries
production
by
coupling
LFP‐assisted
ferricyanide/ferrocyanide
([Fe(CN)
6
]
4−
/[Fe(CN)
3−
)
redox
reaction.
The
onset
potential
electrooxidation
[Fe(CN)
is
low
at
0.87
V.
Operando
Raman
UV/Visible
spectroscopy
confirm
that
presence
LFP
in
electrolyte
allows
rapid
reduction
,
thereby
completing
cycle
as
well
facilitating
conversion
into
LiOH
⋅
H
2
O
FePO
.
electrolyzer
consumes
3.6
kWh
electricity
per
cubic
meter
produced
300
mA
cm
−2
which
43
%
less
than
conventional
water
electrolysis.
Additionally,
this
pathway
not
only
minimizes
chemical
prevents
secondary
pollution
but
also
presents
significant
benefits.
