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Recyclable and Reusable Fe3O4@Polydopamine for Valuable Metal Recovery from Spent Lithium-Ion Batteries
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2023-03-20 , DOI: 10.1021/acssuschemeng.2c06778 Xuhui Zhu 1 , Siyuan Luo 1 , Mengqi Gong 1 , Ran Mo 1 , Yang Li 2 , Shun Yang 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2023-03-20 , DOI: 10.1021/acssuschemeng.2c06778 Xuhui Zhu 1 , Siyuan Luo 1 , Mengqi Gong 1 , Ran Mo 1 , Yang Li 2 , Shun Yang 1
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Acid leaching has attracted increasing attention for recovering valuable metals from spent lithium-ion batteries (LIBs), and additional reductant is required to improve leaching efficiency, in particular. However, the addition of reductant would not only increase costs but also make subsequent processing more difficult. Here, Fe3O4@polydopamine (PDA) is used as a green, recyclable, and reusable reductant, associating with citric acid to recover Li and Co from spent LiCoO2. Under optimal conditions, Li and Co have maximum leaching efficiencies of 99.02% and 98.02%, respectively. After magnetic separation, Fe3O4@PDA could be easily recycled and reused again for subsequent leaching. After three successive recycles, Li and Co have corresponding leaching efficiencies of 90.2% and 82.3%. Furthermore, the invalid Fe3O4@PDA is able to be renewed via a facile polymerization process, and the leaching efficiencies of Li and Co revert to 97.1% and 95.1%, respectively. The Li and Co in the leaching solution could be further recovered as Li2CO3 and Co3O4 via a simple precipitation process. Finally, a mechanism based on the analysis of cathode materials and Fe3O4@PDA before and after leaching is developed.
中文翻译：
可回收和可重复使用的 Fe3O4@Polydopamine 用于从废锂离子电池中回收有价值的金属
酸浸出从废锂离子电池 (LIB) 中回收有价金属已引起越来越多的关注，特别是需要额外的还原剂来提高浸出效率。但是，还原剂的加入不仅会增加成本，还会增加后续加工的难度。在这里，Fe 3 O 4 @聚多巴胺 (PDA) 被用作绿色、可回收和可重复使用的还原剂，与柠檬酸结合从废 LiCoO 2 中回收 Li和Co。在最佳条件下，Li和Co的最大浸出效率分别为99.02%和98.02%。经过磁选，Fe 3 O 4@PDA 可以很容易地回收并再次用于后续浸出。经过3次连续循环后，Li和Co对应的浸出效率分别为90.2%和82.3%。此外，无效的 Fe 3 O 4 @PDA 可以通过简单的聚合过程进行更新，Li 和 Co 的浸出效率分别恢复到 97.1% 和 95.1%。浸出液中的Li和Co可以通过简单的沉淀过程进一步回收为Li 2 CO 3和Co 3 O 4 。最后，开发了一种基于浸出前后阴极材料和 Fe 3 O 4 @PDA分析的机理。
更新日期：2023-03-20
中文翻译：
可回收和可重复使用的 Fe3O4@Polydopamine 用于从废锂离子电池中回收有价值的金属
酸浸出从废锂离子电池 (LIB) 中回收有价金属已引起越来越多的关注，特别是需要额外的还原剂来提高浸出效率。但是，还原剂的加入不仅会增加成本，还会增加后续加工的难度。在这里，Fe 3 O 4 @聚多巴胺 (PDA) 被用作绿色、可回收和可重复使用的还原剂，与柠檬酸结合从废 LiCoO 2 中回收 Li和Co。在最佳条件下，Li和Co的最大浸出效率分别为99.02%和98.02%。经过磁选，Fe 3 O 4@PDA 可以很容易地回收并再次用于后续浸出。经过3次连续循环后，Li和Co对应的浸出效率分别为90.2%和82.3%。此外，无效的 Fe 3 O 4 @PDA 可以通过简单的聚合过程进行更新，Li 和 Co 的浸出效率分别恢复到 97.1% 和 95.1%。浸出液中的Li和Co可以通过简单的沉淀过程进一步回收为Li 2 CO 3和Co 3 O 4 。最后，开发了一种基于浸出前后阴极材料和 Fe 3 O 4 @PDA分析的机理。
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