Efficient and Prioritized Lithium Recovery from Spent Li(Ni0.5Co0.2Mn0.3)O2 Cathodes via SO2 Treatment

被引：0
|
作者：
Wu, Zejia [1 ,3 ]
Yuan, Jiashu [2 ,3 ]
Wang, Hui [3 ]
Pan, Zaifa [1 ]
Gao, Jie [3 ]
Xia, Yonggao [2 ,3 ]
机构：
[1] College of Chemical Engineering, Zhejiang University of Technology, Zhejiang Province, Hangzhou,310023, China
[2] School of New Energy, Ningbo University of Technology, Ningbo,315336, China
[3] Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 Zhongguan West Road, Zhenhai District, Zhejiang Province, Ningbo,315201, China
来源：
ACS Sustainable Chemistry and Engineering | 2024年 / 12卷 / 41期
关键词：
With the wide application of ternary lithium-ion batteries; the increased usage of batteries has resulted in a corresponding rise in the amount of discarded batteries. Here; we propose an efficient and prioritized lithium extraction process with a low environmental impact for the recovery of valuable metal components from spent LiNi0.5Co0.2Mn0.3O2 cathode materials. SO2 calcination-water leaching was used to recover Li; while H2SO4 acid leaching facilitated the recovery of Ni; Co; and Mn; yielding a precursor solution for the treatment of discarded NCM batteries. The effects of calcination temperature; calcination time; water leaching time; water leaching liquid-solid ratio; different battery ratios; acid leaching time; acid leaching liquid-solid ratio; and acid leaching temperature were optimized. The acid leaching process was controlled by surface chemical reactions through kinetic analysis. Under optimal conditions; Li was converted to soluble Li2SO4; achieving an impressive leaching rate of 99.7%. Ni; CO; and Mn were converted to their respective oxides. Furthermore; it was demonstrated that the formation of Li2Mn(SO4)2 from Mn with Li during calcination enhances the leaching efficiency across different battery composition ratios. The activation energies of Ni; and Mn during the acid leaching process were determined by kinetic calculations; yielding values of 130.19; 133.05; and 134.09 kJ mol-1; respectively. This study provides a novel method for recycling spent NCM cathode materials. © 2024 American Chemical Society;
D O I：
10.1021/acssuschemeng.4c01646
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页码：14968 / 14977
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