About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Advances in Recycling and Environmental Technologies
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| Presentation Title |
Thermokinetic Analysis and Green Recovery of Lithium
from End-of-Life LMO-based LIBs via Pyrometallurgy and Water Leaching
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| Author(s) |
Seojin Lee, Sanghoon Lee, Il Sohn |
| On-Site Speaker (Planned) |
Seojin Lee |
| Abstract Scope |
The growing use of energy storage systems (ESS) for renewable energy has increased demand for lithium manganese oxide (LMO, LiMn₂O₄) batteries, raising concerns about their end-of-life management. This study investigates solid-gas reduction of spent LMO cathodes under argon at 800–1000 °C, where residual carbon creates a reducing atmosphere via the Boudouard reaction. Thermogravimetric analysis (TGA) with gas analysis elucidated stepwise decomposition of LMO to Mn₃O₄ and MnO, with lithium forming Li₂O and Li₂CO₃.Isoconversional kinetic analysis revealed that activation energy decreased above 800 °C due to the Boudouard reaction, but increased above 950 °C due to MnO sintering, as confirmed by SEM. Reduction experiments in a vertical tube furnace at 850, 900, 950, and 1000℃, followed by mechanical milling and water leaching, achieved lithium leaching efficiencies above 95% at temperatures over 900 °C.
These findings provide insights into LMO reduction and leaching behavior, aiding the development of efficient pyrometallurgical recycling methods.
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| Proceedings Inclusion? |
Undecided |
| Keywords |
Pyrometallurgy, Energy Conversion and Storage, Recycling and Secondary Recovery |