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<p>Lithium isotopes (<sup>6</sup>Li, <sup>7</sup>Li) underpin nuclear energy. Metal electromigration for isotope separation remains understudied. In this study, stainless steel capillaries filled with metallic lithium were subjected to a constant current of 20 A, achieving a maximum separation factor of 1.018. By incorporating the cooperation between electric and gravitational fields, the maximum separation factor was increased to 1.025, with <sup>6</sup>Li and <sup>7</sup>Li fractions each containing ~ 20% of total lithium. This research broadens the methods of electromigration separation for lithium isotopes and is anticipated to provide new insights for the separation of metal isotopes.</p> Graphical abstract <p></p>

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The cooperation of electromigration and gravity in isotope separation of molten metal lithium: exploration and discovery

  • 期刊论文

  • 发表日期：

    2025年11月4日

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  • Chunsen Ye,
  • Xiao Li,
  • Lianjing Mao,
  • Tianyu Zheng,
  • Pengrui Zhang,
  • Wei Sun,
  • Jinhe Sun

摘要

Lithium isotopes (6Li, 7Li) underpin nuclear energy. Metal electromigration for isotope separation remains understudied. In this study, stainless steel capillaries filled with metallic lithium were subjected to a constant current of 20 A, achieving a maximum separation factor of 1.018. By incorporating the cooperation between electric and gravitational fields, the maximum separation factor was increased to 1.025, with 6Li and 7Li fractions each containing ~ 20% of total lithium. This research broadens the methods of electromigration separation for lithium isotopes and is anticipated to provide new insights for the separation of metal isotopes.

Graphical abstract