期刊
JOURNAL OF ENVIRONMENTAL MANAGEMENT
卷 256, 期 -, 页码 -出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2019.109935
关键词
Spent lithium ion battery; Cathode materials; Rapid dissolution; Mild organic acids; Microwave-assisted dissolution
资金
- Rani Channamma University [MRP: RCUB/RO/2018-19/1319]
- DST-FIST, Ministry of Science & Technology, Govt. of India [SR/FST/CSI-273/2016 C]
This study is aimed to recover the valuable metal ions from cathode materials of spent Li-ion batteries (LIBs). Rapid microwave-assisted dissolution process is investigated here to recover Li and Co from LiCoO2 of spent LIBs. In the conventional method, about 6 h is required to extract about 90% of Li and Co using a mixture of citric acid (CA) and ascorbic acid (AA) at 80 degrees C. On the other hand, more than 85% of Li and Co was obtained in about 25 min by microwave (180 W)-assisted dissolution. The dissolved Co and Li ions were precipitated, selectively: Li as LiHC2O4 H2O or Li2CO3 and Co as CoC2O4 2H(2)O or Co-citrate/ascorbate. The Co3O4 was formed on heating the Co precipitate at 600 degrees C for 2 h. It is important to note that LiCoO2 was re-synthesized here by thermal decomposition of CoC2O4 2H(2)O and LiHC2O4 H2O at 750 degrees C for about 24 h. Thus, the microwave-assisted hydrometallurgical method is found to be simple and rapid to recover Li and Co from spent LIBs.
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