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http://dx.doi.org/10.7844/kirr.2014.23.4.21

Leaching of Valuable Metals from NCM Cathode Active Materials in Spent Lithium-Ion Battery by Malic acid  

Son, Seong Ho (Korea Institute of Industrial Technology)
Kim, Jin Hwa (Korea Institute of Industrial Technology)
Kim, Hyun-Jong (Korea Institute of Industrial Technology)
Kim, Sun Jung (School of Materials Science and Engineering, university of Ulsan)
Lee, Man Seung (Department of Advanced Material Science and Engineering, Mokpo National University)
Publication Information
Resources Recycling / v.23, no.4, 2014 , pp. 21-29 More about this Journal
Abstract
Nickel, cobalt and manganese-based(NCM, $Li(Ni_xCo_yMn_z)O_2$) cathode active materials of spent lithium-ion batteries contained valuable metals such as cobalt(15 ~ 20%), nickel(25 ~ 30%), manganese(10 ~ 15%) and lithium(5 ~ 10%). It was investigated the eco-friendly leaching process for the recovery of valuable metal from spent lithium-ion battery NCM cathode active materials by DL-malic acid($C_4H_5O_6$) as an organic leachant in this research. The experiments were carried out to optimize the process parameters for the recovery of cobalt, nickel and lithium by varying the concentration of lixivant, reductant concentration, solid/liquid ratio and temperature. The leaching solution was analyzed using ICP-OES(Inductively Coupled Plasma Optic Emission Spectrometer). Cathode active materials of 5 wt. % were introduced into the leaching solution which was 2 M DL-malic acid in addition of 5 vol. % $H_2O_2$ at $80^{\circ}C$ and it resulted in the recovery of 99.10% cobalt, 99.80% nickel and 99.75% lithium in 120 min. $H_2O_2$ in DL-malic acid solution acts as an effective reducing agents, which enhance the leaching of metals.
Keywords
Spent Lithium Ion Batteries; Organic acid; $Li(Ni_xCo_yMn_z)O_2$; Recycling; Valuable Metal;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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