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从使用过的离子电池中回收NMC黑质量,使用超临界流体提取

Mahla Mahmoudi¹, Maziar E Sauber², Gisele Azimi¹

¹Laboratory for Strategic Materials, Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, ON M5S 3E5, Canada.

Waste management (New York, N.Y.)

|October 3, 2025

概括

超临界流体提取 (SCFE) 有效地回收离子电池的黑质量. 这种可持续的方法可以回收90%以上的Ni,Co和Mn,即使含有杂质,为关键材料回收提供了更绿色的替代方案.

科学领域:

材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.
可持续化学可持续化学

背景情况:

对离子电池回收的需求不断增加,需要有效和可持续的金属回收.
现有方法面临的挑战是工业黑质中的杂质.
超临界流体提取 (SCFE) 提供了选择性金属回收的潜力.

研究的目的:

为了证明SCFE的可行性和选择性,用于从工业离子电池中回收金属.黑质量.
在实际条件下优化SCFE参数,以实现最大的金属提取效率.
评估过程的环境影响和可扩展性的潜力.

主要方法:

使用超临界CO2与酸-酸添加物和过氧化作为减少剂的应用.
使用全因数设计和响应表面方法的优化.
使用XRD,SEM-EDX,拉曼光谱和TC/TOC分析对提取的金属和残留材料进行表征.

主要成果:

在最佳条件下 (65°C,20.7MPa) 为Ni,Co和Mn实现了>90%的提取效率,为Li达到73%.
已证明有选择性的金属去除,同时保持残留物中的碳质材料结构.
确定了添加剂和还原剂在金属复合和溶解中的关键作用.

结论:

SCFE是一种有前途,低影响和化学选择性的离子电池回收利用方法.
该过程在温和条件下运行,试剂消耗减少,提高了可持续性.
这项研究为从消费后电池中进行可扩展,对环境负责任的关键材料回收提供了基础.

关键词:

重要金属回收重要金属回收离子电池 (LIB) 废弃物废弃物在NMC黑色质量回收的回收.超临界流体提取 (SCFE) 是一种超临界流体提取技术.可持续的电池回收利用方式

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