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Novel approach to recycling of valuable metals from spent lithium-ion batteries using hydrometallurgy, focused on preferential extraction of lithium.
- Source :
-
Journal of Cleaner Production . Dec2023, Vol. 431, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- Traditional recycling technology for spent lithium-ion batteries faces the issue of low Li recovery due to the considerable Li loss during leaching and further purification operations. To improve the Li recovery, high-pressure acid leaching using H 2 SO 4 for Li preferential liberation and the subsequent purification were systematically investigated. Experimental results showed that 97.6% of Li was preferentially leached with about 2% of Ni, Co, and Mn co-leached, and a leaching solution with a Li+ concentration of 21.46 g/L was obtained. Further characterization indicated that most of Li was first liberated and exchanged by the proton (H+), then the high reaction temperature induced the hydrolysis of the co-leached Ni2+, Co2+, and Mn2+ and generated extra H+ prompted a deeper liberation of Li from the undissolved NCM structures. Additionally, the high-purity Li 2 CO 3 was achieved via a synergistic extraction by D2EHPA and 4PC for the deep removal and recovery of co-leached Ni/Co/Mn followed by carbonation. Compared with the traditional end-Li-recovery method, the proposed method possesses the advantages of a short Li extraction process, high recovery, and low cost. Moreover, the preferential leaching of Li provided an opportunity for a novel hydrometallurgical process to recover spent lithium-ion batteries that consists of Li preliminary leaching, Ni–Co–Mn material leaching, precipitation of Fe/Al, and selective extraction of F, Ni, Co, and Mn was not separated that shorten the flowsheet in this process, dramatically reduced reagent consumption and wastewater generation. [Display omitted] • Preferentially extraction of Li with H 2 SO 4 was achieved by pressure leaching. • Hydrolysis of NCM compounds followed by H+/Li+ exchange reinforce Li liberation. • Selective removal of NCM impurities in leaching solution by D2EHPA/4 PC extraction. • A novel approach to recover valuable metals from spent LIBs was provided. [ABSTRACT FROM AUTHOR]
- Subjects :
- *METAL recycling
*LITHIUM-ion batteries
*LITHIUM
*HYDROMETALLURGY
*LEACHING
Subjects
Details
- Language :
- English
- ISSN :
- 09596526
- Volume :
- 431
- Database :
- Academic Search Index
- Journal :
- Journal of Cleaner Production
- Publication Type :
- Academic Journal
- Accession number :
- 173945777
- Full Text :
- https://doi.org/10.1016/j.jclepro.2023.139645