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题名: An environmental benign process for cobalt and lithium recovery from spent lithium-ion batteries by mechanochemical approach
作者: Wang, Meng-Meng; Zhang, Cong-Cong; Zhang, Fu-Shen
刊名: WASTE MANAGEMENT
出版日期: 2016-05
卷号: 51, 页码:239-244
关键词: Spent lithium-ion batteries ; Mechanochemical approach ; Lithium cobalt oxide ; EDTA ; Metal recovery
DOI: 10.1016/j.wasman.2016.03.006
部门归属: 固体废弃物处理与资源化实验室
英文摘要: In the current study, an environmental benign process namely mechanocheinical approach was developed for cobalt and lithium recovery from spent lithium-ion batteries (LIBs). The main merit of the process was that neither corrosive acid nor strong oxidant was applied. In the proposed process, lithium cobalt oxide (obtained from spent LIBs) was firstly co-grinded with various additives in a hermetic ball milling system, then Co and Li could be easily recovered by a water leaching procedure. It was found that EDTA was the most suitable co-grinding reagent, and 98% of Co and 99% of Li were respectively recovered under optimum conditions: LiCoO2 to EDTA mass ratio 1:4, milling time 4 h, rotary speed 600 r/min and ball-to-powder mass ratio 80:1, respectively. Mechanisms study implied that lone pair electrons provided by two nitrogen atoms and four hydroxyl oxygen atoms of EDTA could enter the empty orbit of Co and Li by solid-solid reaction, thus forming stable and water-soluble metal chelates Li-EDTA and Co-EDTA. Moreover, the separation of Co and Li could be achieved through a chemical precipitation approach. This study provides a high efficiency and environmentally friendly process for Co and Li recovery from spent LIBs. (C) 2016 Elsevier Ltd. All rights reserved.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/35775
Appears in Collections:固体废弃物处理与资源化实验室_期刊论文

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