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Updated: Jun 30, 2025

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从LiFePO₄电池阴极材料回收金属,使用基于离子液体的水性双相系统

Xiaohua Li¹, Maia Benstead², Nand Peeters¹

¹KU Leuven, Department of Chemistry Celestijnenlaan 200F, P. O. Box 2404 B-3001 Leuven Belgium Xiaohua.li@kuleuven.be.

|March 20, 2024

概括

本研究介绍了一种有效的方法,用于从铁酸盐 (LFP) 电池阴极回收金属. 该过程使用离子液体系统选择性回收铁和,使高纯度材料回收和可重复使用的离子液体成为可能.

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.
环境科学环境科学

背景情况:

离子电池 (LIB) 对电动汽车和储能至关重要.
不断增长的LIB生产导致大量的废物,需要可持续的回收方法.
回收LiFePO4 (LFP) 阴极材料在选择性金属回收方面存在挑战.

研究的目的:

开发一种高效和环保的方法,从LFP阴极材料回收金属.
通过以离子液为基础的水性双相系统 (IL-ABS) 研究和铁的分离.
为了实现铁和的高纯度回收,并评估离子液体的可回收性.

主要方法:

在没有氧化剂的情况下使用HCl出LFP阴极材料.
使用含有[P44414]Cl和化剂 (HCl或NaCl) 的IL-ABS分离和铁.
沉铁作为氧化物和作为酸,其次是IL再生.

主要成果:

优化漏实现了高金属回收产量.
IL-ABS证明了选择性的铁提取 (90%,通过两阶段过程提升至98%),最小的联合提取 (<1%).
高纯度铁 (97%作为氧化物) 和 (99.5%作为Li3PO4) 被回收. 离子液体在四个循环中被循环回收,没有性能损失.

结论:

开发的IL-ABS工艺为从LFP电池废物中回收有价值金属提供了有效的途径.
该方法具有选择性,高效,并通过离子液体再生支持循环经济原则.
这种方法有助于可持续的电池回收和资源管理.

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