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<p>As the demand for lithium-ion batteries (LIBs) rises with the growth of electric vehicles and renewable energy technologies, efficient recycling methods for spent LIBs have become critical. Recovering lithium from the industrial effluent of battery recycling not only addresses the increasing need for this essential material but also mitigates environmental risks and supports circular economic goals. This study evaluates the regenerative performance and reusability of the dibenzoylmethane-trioctylphosphine oxide (HDBM-TOPO) extractant system for lithium recovery from waste LIBs. Optimal conditions were established, including 1.8&#xa0;mol/L H<sub>2</sub>SO<sub>4</sub> for stripping and a 10-minute stabilization time, to maintain extractant efficiency. Regeneration using NaOH successfully restored performance, achieving lithium extraction efficiency exceeding 94% over five regeneration cycles with high selectivity for Li/Na, under challenging conditions with high Na/Li ratios. The findings confirm the stability and efficiency of the HDBM-TOPO system, offering a sustainable solution for lithium recovery, contributing to resource conservation and environmental protection in the LIB recycling industry.</p>

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Regeneration and Reusability of HDBM-TOPO for Lithium Recovery from Industrial Effluent of a Battery Recycling

  • 期刊论文

  • 发表日期：

    2026年1月13日

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  • Yeongeun Choi,
  • Jieun Cha,
  • Seungu Cho,
  • Seohyeon Park,
  • Seokbeom Choi,
  • Hojung Kim,
  • Daesung Song

摘要

As the demand for lithium-ion batteries (LIBs) rises with the growth of electric vehicles and renewable energy technologies, efficient recycling methods for spent LIBs have become critical. Recovering lithium from the industrial effluent of battery recycling not only addresses the increasing need for this essential material but also mitigates environmental risks and supports circular economic goals. This study evaluates the regenerative performance and reusability of the dibenzoylmethane-trioctylphosphine oxide (HDBM-TOPO) extractant system for lithium recovery from waste LIBs. Optimal conditions were established, including 1.8 mol/L H2SO4 for stripping and a 10-minute stabilization time, to maintain extractant efficiency. Regeneration using NaOH successfully restored performance, achieving lithium extraction efficiency exceeding 94% over five regeneration cycles with high selectivity for Li/Na, under challenging conditions with high Na/Li ratios. The findings confirm the stability and efficiency of the HDBM-TOPO system, offering a sustainable solution for lithium recovery, contributing to resource conservation and environmental protection in the LIB recycling industry.