Biomass-based vegetable-/fruit-derived solvents for green recovery of LiFePO4 cathodes from spent lithium-ion batteries: alternatives to ionic liquids, deep eutectic solvents and low-melting mixture solvents†

IF 2.7 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
Yu Chen, Ziteng Yang, Yanlong Wang, Guojian Zhao, Taoran Wang, Minghui Feng, Mengxi Zhao, Xihou Wang and Dexin Dong
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Abstract

Lithium iron phosphate (LFP)-based lithium-ion batteries (LIBs) are widely used in various fields due to their advantages such as low cost, long service life, and high energy density. The widespread use of LFP-based LIBs leads to the generation of large quantities of spent LFP cathode materials, which contribute to environmental pollution and resource waste. Therefore, it is necessary to develop a new strategy to recycle spent LFP cathode materials from LIBs. Here, we use non-toxic, low-cost and naturally available vegetable-/fruit-derived solvents (VFSs) to efficiently and mildly recover LFP cathodes from LIBs. The highest leaching efficiency of Li and Fe from LFP using VFSs is 98.8% and 99.8%, respectively. The superhigh leaching efficiency of Li and Fe achieved by VFSs is comparable to that obtained using other green solvents, including ionic liquids, deep eutectic solvents, and low-melting mixture solvents; however, VFSs in this work are greener, cheaper and even could be edible. In addition, a high precipitation efficiency of Li (83.4%) and Fe (98.5%) could be achieved at room temperature after screening 69 kinds of antisolvents.

Abstract Image

用于废旧锂离子电池LiFePO4阴极绿色回收的生物质植物/水果衍生溶剂:离子液体、深共晶溶剂和低熔点混合溶剂的替代品
磷酸铁锂(LFP)基锂离子电池(LIBs)以其成本低、使用寿命长、能量密度高等优点被广泛应用于各个领域。LFP基锂离子电池的广泛使用导致了大量废旧LFP正极材料的产生,造成了环境污染和资源浪费。因此,有必要开发一种从锂离子电池中回收废旧LFP正极材料的新策略。在这里,我们使用无毒,低成本和天然可用的蔬菜/水果衍生溶剂(VFSs)来有效和温和地从lib中回收LFP阴极。vfs浸出LFP中Li和Fe的最高浸出率分别为98.8%和99.8%。vfs对Li和Fe的超高浸出效率与其他绿色溶剂(包括离子液体、深共晶溶剂和低熔点混合溶剂)相当;然而,这项研究中的vfs更环保、更便宜,甚至可以食用。另外,筛选69种反溶剂后,室温下Li和Fe的析出效率分别为83.4%和98.5%。
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来源期刊
New Journal of Chemistry
New Journal of Chemistry 化学-化学综合
CiteScore
5.30
自引率
6.10%
发文量
1832
审稿时长
2 months
期刊介绍: A journal for new directions in chemistry
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