Electrodeposition of rare-earth elements from neodymium magnets using molten salt electrolysis |
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| Authors: | Y. Kamimoto T. Itoh G. Yoshimura K. Kuroda T. Hagio R. Ichino |
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| Affiliation: | 1.Green Mobility Research Institute, Institute of Innovation for Future Society,Nagoya University,Nagoya,Japan;2.Graduated School of Engineering,Nagoya University,Nagoya,Japan;3.Institute of Materials and Systems for Sustainability,Nagoya University,Nagoya,Japan |
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| Abstract: | Rare-earth element is an important target for recycling in Japan. In our previous work, we demonstrated the selective leaching of rare-earth elements from waste neodymium magnets using chloride molten salt electrolysis. In this study, we investigated the electrodeposition of rare-earth elements using liquid metal as a cathode. The reduction potential obtained using a liquid-zinc electrode was higher than that obtained using a solid molybdenum electrode. A zinc–rare-earth alloy was formed as the electrodeposit. The total rare-earth element content of the electrodeposit was more than 99.8 mass% without zinc and other composition of electrolysis. The activity of rare-earth elements decreased upon alloy formation, suggesting that the oxidation rate of electrodeposited alloy will be decreased. |
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