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Research Article

Hydrometallurgical recycling of valuable metals from spent lithium-ion batteries by reductive leaching with stannous chloride

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  • Received: 10 March 2020Revised: 16 May 2020Accepted: 8 June 2020Available online: 10 June 2020
  • A reductant counts for much in the hydrometallurgical recycling of valuable metals from spent lithium-ion batteries (LIBs). There is limited information about SnCl2 as a reductant with organic acid (maleic acid) to recover value metals from spent LiCoO2 material. The leaching efficiencies were 98.67% and 97.59% for Li and Co with 1 mol L-1 of maleic acid and 0.3 mol L-1 of SnCl2 at 60°C and 40 min. And the kinetics and thermodynamics of the leaching process were inquired in the article to study the mechanism of leaching process clearly. According to the comparison of H2O2 on the leaching efficiency, optimal leaching parameters and the activation energy, it is feasible to replace H2O2 with SnCl2 as a leaching reducer in the leaching process. In addition, when SnCl2 is used in the acid-leaching process, Sn residue in leachate may has a positive effect on the re-synthesis of nickel-rich cathode materials. Therefore, the present study can provide a new direction for reductants selection for the hydrometallurgical recovery of valuable metals from spent LIBs
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Hydrometallurgical recycling of valuable metals from spent lithium-ion batteries by reductive leaching with stannous chloride

  • Corresponding author:

    Qing Huang    E-mail: huangqing3121@sina.com

  • School of Materials Science and Engineering, Beijing Institute Technology, Beijing, China

Abstract: A reductant counts for much in the hydrometallurgical recycling of valuable metals from spent lithium-ion batteries (LIBs). There is limited information about SnCl2 as a reductant with organic acid (maleic acid) to recover value metals from spent LiCoO2 material. The leaching efficiencies were 98.67% and 97.59% for Li and Co with 1 mol L-1 of maleic acid and 0.3 mol L-1 of SnCl2 at 60°C and 40 min. And the kinetics and thermodynamics of the leaching process were inquired in the article to study the mechanism of leaching process clearly. According to the comparison of H2O2 on the leaching efficiency, optimal leaching parameters and the activation energy, it is feasible to replace H2O2 with SnCl2 as a leaching reducer in the leaching process. In addition, when SnCl2 is used in the acid-leaching process, Sn residue in leachate may has a positive effect on the re-synthesis of nickel-rich cathode materials. Therefore, the present study can provide a new direction for reductants selection for the hydrometallurgical recovery of valuable metals from spent LIBs

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