Selective recovery of cobalt from the cathode materials of NMC type Li-ion battery by ultrasound-assisted acid leaching and microemulsion extraction

A selective recovery process for cobalt from the cathode materials of Li-ion batteries is demonstrated in this report. First, acid leaching was applied to dissolve the metals from the lithium-metal oxides. It was found out that with the assistance of probe type ultrasonication, manganese could be si...

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Published inSeparation science and technology Vol. 55; no. 16; pp. 3028 - 3035
Main Authors Wang, Wen-Yu, Yen, Clive H., Hsu, Jeng-Kai
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 01.11.2020
Taylor & Francis Ltd
Subjects
Acid leaching
Batteries
Cathodes
Cobalt
Electrode materials
Heavy metals
Leaching
Li-ion battery
Lithium
Lithium-ion batteries
Manganese
Metal oxides
microemulsion
Microemulsions
Rechargeable batteries
Recovery
Ultrasound
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Summary:A selective recovery process for cobalt from the cathode materials of Li-ion batteries is demonstrated in this report. First, acid leaching was applied to dissolve the metals from the lithium-metal oxides. It was found out that with the assistance of probe type ultrasonication, manganese could be simultaneously separated by precipitation. This phenomenon would reduce the difficulty for later separation. Next, water-in-oil microemulsion extraction was applied for direct extraction of cobalt from the other metals. The cobalt extraction yield was 98% and purity was 96%. Moreover, the microemulsion system could be reused for 100 times without losing its extraction ability.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:0149-6395
1520-5754
DOI:10.1080/01496395.2019.1665071