Tianshu Zhang, Yijun Qian, Changyong Zhang, Tao Qian, Chenglin Yan
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引用次数: 0
摘要
随着全球对锂离子电池(LIB)需求的不断增长,出于对环境和社会需求的考虑,回收废旧锂离子电池被认为是应对即将到来的锂离子电池退役潮的有效方法。尽管湿法冶金在通过化学纯化方法从浸出液中实现关键金属元素的高价值回收方面得到了高度认可,但其相关的复杂操作、大量化学消耗和低效率无法满足可持续发展和生态友好的要求,因此需要一种创新的分离方法来实现这些目标。电渗析(ED)是一种先进的膜分离技术,具有连续操作和可扩展性的优势,但尚未广泛应用于从废锂电池浸出液中回收关键金属。在本综述中,我们将介绍 ED 技术的基本原理和评估指标。此外,还讨论了从浸出液中提取金属的 ED 所面临的挑战。此外,还提供并强调了提高 ED 分离性能的策略。最后,我们介绍了在从废 LIB 的浸出液中提取金属时使用 ED 技术所面临的机遇和挑战。
Critical metal recovery from spent lithium-ion batteries’ leaching solution using electrodialysis technologies: strategies and challenges
Accompanied by the ever-increasing demand for lithium-ion batteries (LIBs) worldwide, the recovery of spent LIBs, for both environmental concerns and social needs, is considered an efficient way to tackle the coming retirement tide of LIBs. Although hydrometallurgy is highly recognized for realizing the high-value recycling of critical metal elements from leaching solutions via chemical purification methods, its associated complex operations, large chemical consumption, and low efficiency fail to meet sustainability and eco-friendliness considerations, requiring an innovative separation approach to achieve these aims. Electrodialysis (ED) has emerged as an advanced membrane separation technology offering continuous operation and scalability advantages but has yet to be widely applied in recycling critical metals from the leaching solutions of spent LIBs. In this review, we introduce the fundamentals and evaluation indicators of the ED technique. Besides, the challenges of ED in metal extraction from the leaching solution are discussed. In addition, strategies for improving the separation performance of ED are provided and highlighted. Finally, we present the opportunities and challenges for the use of ED techniques in metal extraction from the leaching solution of spent LIBs.