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The presence of reductants is crucial in the processing of cathode material from spent lithium-ion batteries (LIBs), such as LiCoO2 (LCOLiCoO2 (LCO)). The conventional method of processing LCOLiCoO2 (LCO) involves the use of H2O2 as the reductant. To some degree, metallic elementsMetallic elements can be utilized as reductants. This has the benefit of being able to recover both the metals from LCOLiCoO2 (LCO) and the metal reductants, as well as better transportation and handling compared to aqueous H2O2. The present study aims to assess the effectiveness of metallic elementsMetallic elements (Al, Cu, Fe, Mn, Ni, and Zn) as reductants in the processing of LCOLiCoO2 (LCO) via aqueous leachingLeaching using H2SO4 and solvoleachingSolvoleaching using organic extractants (D2EHPA, PC88A, and Cyanex 272). Such protocols were followed, including performing the experiments at varied LCOLiCoO2 (LCO)/metal mass ratios, investigating the effect of graphite, and the effect of water addition and the type of organic extractants in the solvoleachingSolvoleaching process.

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Assessment of Metallic Elements as Reductant in the Processing of LiCoO2 (LCO): Comparison Between Aqueous Leaching Using H2SO4 and Solvoleaching Using Acidic Organic Extractants

  • 会议论文

  • 发表日期：

    2025年

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  • Kurniawan Kurniawan,
  • Mooki Bae,
  • Sookyung Kim

摘要

The presence of reductants is crucial in the processing of cathode material from spent lithium-ion batteries (LIBs), such as LiCoO2 (LCOLiCoO2 (LCO)). The conventional method of processing LCOLiCoO2 (LCO) involves the use of H2O2 as the reductant. To some degree, metallic elementsMetallic elements can be utilized as reductants. This has the benefit of being able to recover both the metals from LCOLiCoO2 (LCO) and the metal reductants, as well as better transportation and handling compared to aqueous H2O2. The present study aims to assess the effectiveness of metallic elementsMetallic elements (Al, Cu, Fe, Mn, Ni, and Zn) as reductants in the processing of LCOLiCoO2 (LCO) via aqueous leachingLeaching using H2SO4 and solvoleachingSolvoleaching using organic extractants (D2EHPA, PC88A, and Cyanex 272). Such protocols were followed, including performing the experiments at varied LCOLiCoO2 (LCO)/metal mass ratios, investigating the effect of graphite, and the effect of water addition and the type of organic extractants in the solvoleachingSolvoleaching process.