ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(47), P. 64877 - 64888
Published: Nov. 13, 2024
Steel
slag
is
a
promising
secondary
resource
necessitating
recycling
and
high-value
utilization.
This
study
innovatively
converted
steel
into
micronano
FePO4
well-performing
LiFePO4/C
through
selective
two-step
leaching
process
followed
by
fast
coprecipitation
in
HMCRR
under
superior
mass
transfer,
subsequent
situ
carbothermal
reduction
afterward,
thereby
realizing
waste-to-resource
conversion
pathway.
Besides,
metal
mechanism
was
proposed
based
on
comprehensive
composition
analysis,
affirming
the
selectivity.
Thermomechanical
analysis
for
precipitation
underscored
importance
of
controlling
reaction
pH
to
prevent
formation
impure
sediments.
Leveraging
efficient
transfer
during
precursor
preparation,
further-made
carbon-coated
derived
from
exhibited
favorable
morphology
enhanced
discharge
capacity,
especially
at
high
rates,
owing
ion
diffusion
kinetics,
minimized
Li+
migration
distance,
improved
structure
stability.
Notably,
capacity
could
reach
167.44,
153.56,
119.62
mAh/g
0.1,
1,
10
C,
respectively.
