华中科技大学谢佳团队报道了从废电池中直接提取锂，实现锂的高效回收。相关研究成果于2024年2月27日发表于国际顶尖学术期刊《科学通报》。

锂离子电池市场的蓬勃发展导致了对锂资源的需求激增。为即将大规模报废的锂离子电池开发高效回收技术，可以大大促进锂资源的可持续利用。

该文中，研究人员使用由多环芳烃和醚溶剂组成的溶液，在室温下通过简单、高效、低能耗的化学浸出工艺，成功地从废锂离子电池中提取了活性锂。通过阐明氧化还原电位与萃取效率之间的关系，阐明了锂萃取的机理。

更重要的是，回收的活性锂直接用于制备性能与商业材料相当的LiFePO₄阴极。当在56Ah棱柱形电池中运行时，电池在1200次循环后提供稳定的循环性能，容量保持率为～90%。与其他策略相比，这种技术方法显示出优越的经济效益和实用前景。预计这种方法可能会重新定义报废LIBs的回收模式，并推动行业的可持续发展。

附：原文原文

Title: Direct lithium extraction from spent batteries for efficient lithium recycling

Author: anonymous

Issue&Volume: 2024/02/27

Abstract: The flourishing expansion of the lithium-ion batteries (LIBs) market has led to a surge in the demand for lithium resources. Developing efficient recycling technologies for imminent large-scale retired LIBs can significantly facilitate the sustainable utilization of lithium resources. Here, we successfully extract active lithium from spent LIBs through a simple, efficient, and low-energy-consumption chemical leaching process at room temperature, using a solution comprised of polycyclic aromatic hydrocarbons and ether solvents. The mechanism of lithium extraction is elucidated by clarifying the relationship between the redox potential and extraction efficiency. More importantly, the reclaimed active lithium is directly employed to fabricate LiFePO4 cathode with performance comparable to commercial materials. When implemented in 56 Ah prismatic cells, the cells deliver stable cycling properties with a capacity retention of ～90% after 1200 cycles. Compared to the other strategies, this technical approach shows superior economic benefits and practical promise. It is anticipated that this method may redefine the recycling paradigm for retired LIBs and drive the sustainable development of industries.

DOI: 10.1016/j.scib.2024.02.034

Source: https://www.sciencedirect.com/science/article/abs/pii/S2095927324001361