Tailoring Lithium
Aluminate Phases Based on Thermodynamics
for an Increased Recycling Efficiency of Li-Ion Batteries
Posted on 2022-10-14 - 07:29
The increased usage of Li-ion batteries (LIBs) requires
innovative
recycling processes, allowing recovering Li with a high recycling
efficiency. Different research groups have developed several recycling
technologies in the past. One promising technology is the pyrometallurgical
combined with the hydrometallurgical process route. To increase the
recycling efficiency of this technology, it is of high relevance to
artificially engineer high lithium-containing phases by tailoring
slag solidification with process parameters and composition. The significant
challenge thereby is the complex interrelationship between composition,
process temperature, and high lithium-containing phases such as LiAlO2. Especially, the influence of Mg impurities in the feed is
crucial for the phase formation. Consequently, the question arises
to what extend the Mg content should be artificially adjusted in combination
with CaO as a slag builder to design LiAlO2. To overcome
this challenge, a comprehensive thermodynamic model framework is presented
in this work, which allows tailoring the slag composition and temperature
such that the LiAlO2 amount can be engineered. The model
is validated successfully by experimental data. For the first time,
this study presents the role and potential of combined MgO and CaO
tailoring for this complex system to gain high amounts of the desired
LiAlO2. This lays a valuable base for significantly increasing
the recycling efficiency in the pyrometallurgical recycling of LIBs
by taking into account unavoidable feed impurities.
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Li, Haojie; Qiu, Hao; Schirmer, Thomas; Goldmann, Daniel; Fischlschweiger, Michael (2022). Tailoring Lithium
Aluminate Phases Based on Thermodynamics
for an Increased Recycling Efficiency of Li-Ion Batteries. ACS Publications. Collection. https://doi.org/10.1021/acsestengg.2c00105
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AUTHORS (5)
HL
Haojie Li
HQ
Hao Qiu
TS
Thomas Schirmer
DG
Daniel Goldmann
MF
Michael Fischlschweiger
KEYWORDS
different research groupsgain high amountshydrometallurgical process routesignificant challenge therebyone promising technologyallowing recovering li2 subtailoring slag solidificationincreased recycling efficiencyhigh recycling efficiencyrecycling efficiencypyrometallurgical recyclingincreased usagehigh relevancehigh lithiumslag builderprocess parametersallows tailoringvaluable basevalidated successfullystudy presentssignificantly increasingquestion arisespyrometallurgical combinedphase formationmg impuritiesmg contention batteriesfirst timeexperimental datacontaining phasescomplex systemcomplex interrelationshipcombined mgoartificially adjusted