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By 2030, spentSpent Lithium-Ion Batteries (LIBs) lithium-ion batteries (LIBs)Lithium-Ion Batteries (LIBs) are projected to generate more than 2 million tons of waste annually, posing both environmental challenges and risks to the sustainable supply of critical metalsCritical metals. Effective recycling Recyclingof LIBs not only mitigates the hazards of toxic waste but also provides a secondary resource pathway to meet the growing demand for strategic materials. This study proposes a sustainable recyclingRecycling strategy based on NaCl electrolysis in an H-type dual-chamber electrolyzer, where treated seawater can be employed as the electrolyte to reduce both cost and environmental impactEnvironmental impacts. The influence of electrolysis parameters on metal leachingLeaching was systematically evaluated, and under optimized conditions (0.09 A, 48 h, 70 °C, 0.5 mol/L NaCl), the leaching efficiency of Li reached 99.5%, with Ni, Co, and Mn achieving 75.0%, 58.4%, and 51.4%, respectively. Structural evolution during leaching was examined using multiple characterization techniques, and the recovered precipitate was successfully regenerated into cathode material. This work demonstrates an integrated approach for LIBRecycling recyclingLithium-ion battery recycling that integrates efficient metalRecovery recoveryMetal recovery with green hydrogen production and cathode material regeneration.

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Recovery of Valuable Metals from Spent Lithium-Ion Batteries by Electrolysis of NaCl Solution: Process Optimization, Regenerated Cathode Materials

  • 会议论文

  • 发表日期：

    2026年

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  • Shuang Xu,
  • Ganming Cao,
  • Feixiang Peng,
  • Zeyu Huang,
  • Huamei Duan,
  • Dengfu Chen

摘要

By 2030, spentSpent Lithium-Ion Batteries (LIBs) lithium-ion batteries (LIBs)Lithium-Ion Batteries (LIBs) are projected to generate more than 2 million tons of waste annually, posing both environmental challenges and risks to the sustainable supply of critical metalsCritical metals. Effective recycling Recyclingof LIBs not only mitigates the hazards of toxic waste but also provides a secondary resource pathway to meet the growing demand for strategic materials. This study proposes a sustainable recyclingRecycling strategy based on NaCl electrolysis in an H-type dual-chamber electrolyzer, where treated seawater can be employed as the electrolyte to reduce both cost and environmental impactEnvironmental impacts. The influence of electrolysis parameters on metal leachingLeaching was systematically evaluated, and under optimized conditions (0.09 A, 48 h, 70 °C, 0.5 mol/L NaCl), the leaching efficiency of Li reached 99.5%, with Ni, Co, and Mn achieving 75.0%, 58.4%, and 51.4%, respectively. Structural evolution during leaching was examined using multiple characterization techniques, and the recovered precipitate was successfully regenerated into cathode material. This work demonstrates an integrated approach for LIBRecycling recyclingLithium-ion battery recycling that integrates efficient metalRecovery recoveryMetal recovery with green hydrogen production and cathode material regeneration.