揭示从磷酸铁锂(LiFePO4†)中还原性机械化学回收锂的机制

David Geiß, Oleksandr Dolotko, Sylvio Indris, Christian Neemann, Andrei Bologa, Thomas Bergfeldt, Michael Knapp and Helmut Ehrenberg
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引用次数: 0

摘要

为了降低与钴供应相关的风险,一种安全且经济实惠的基于磷酸铁锂(LFP)的锂离子电池正极是满足快速增长的电池市场需求的重要解决方案。然而,现有的回收技术不可能对 LFP 进行经济、环保的回收。本研究采用了一种无酸机械化学方法,以 Al 作为还原剂从 LFP 中回收锂。通过研究不同的研磨时间和各组分的摩尔比,阐明了还原球磨和水浸出所涉及的反应机制,从而加深了对这一过程的理解。通过评估最终产品的产量和纯度,可以深入了解这项技术的潜在改进之处。利用铝作为当前收集器的材料,无需额外的外部添加剂,从而简化了回收工作流程。对这一工艺的继续研究有可能促进 LFP 材料的高效和经济回收。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Revealing the mechanism of reductive, mechanochemical Li recycling from LiFePO4†

Revealing the mechanism of reductive, mechanochemical Li recycling from LiFePO4†

In order to mitigate the risks associated with cobalt supply, a safe and affordable LiFePO4-based (LFP) cathode for Li-ion batteries can be a significant solution to meet the rapidly growing battery market. However, economical and environmentally friendly recycling of LFP is impossible with currently available recycling technologies. In this study, an acid-free mechanochemical approach is applied to reclaim Li from LFP using Al as a reducing agent. The reaction mechanism involved in reductive ball-milling followed by water leaching has been elucidated through the examination of various milling times and molar ratios of components, fostering a deeper understanding of the process. Assessing the yield and purity of the final products provides insights into potential enhancements for this technology. Utilizing Al as the material of the current collector eliminates the need for additional external additives, thereby simplifying the recycling workflow. Continued research into this process has the potential to facilitate efficient and economical recycling of LFP materials.

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