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The Effect of NH3 Concentration during Co-precipitation of Precursors from Leachate of Lithium-ion Battery Positive Electrode Active Materials
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 Title & Authors
The Effect of NH3 Concentration during Co-precipitation of Precursors from Leachate of Lithium-ion Battery Positive Electrode Active Materials
Park, Sanghyuk; Ku, Heesuk; Lee, Kyoung-Joon; Song, Jun Ho; Kim, Sookyung; Sohn, Jeongsoo; Kwon, Kyungjung;
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 Abstract
In a recycling scheme of spent lithium ion batteries, a co-precipitation process for the re-synthesis of precursor is essential after the leaching of lithium ion battery scraps. In this study, the effect of ammonia as impurity during the co-precipitation process was investigated in order to re-synthesize a precursor of Ni-rich cathode active material (NCM 622). As ammonia concentration increases from 1 M (the optimum condition for synthesis of the precursors based on 2 M of metal salt solution) to 4 M, the composition of obtained precursors deviates from the designed composition, most notably for Ni. The Ni co-precipitation efficiency gradually decreases from 100% to 87% when the concentration of ammonia solution increases from 1 M to 4 M. Meanwhile, the morphological properties of the obtained precursors such as sphericity, homogeneity and size distribution of particles were also investigated.
 Keywords
recycling;lithium ion battery;NCM;ammonia;co-precipitation;
 Language
Korean
 Cited by
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