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<p>Lithium metal anode represents the ultimate solution for next-generation high-energy-density batteries but is plagued from commercialization by side reactions, substantial volume fluctuation, and the notorious growth of lithium dendrites. These hazardous issues are further aggravated under real-world conditions. In this study, a stable Al-Li/LiF artificial interphase with rapid ion transport pathways is created through a one-step chemical pretreatment process, effectively addressing these challenges simultaneously. As a consequence, the composite interfacial layer exhibits exceptional ionic conductivity, mechanical strength, and electrolyte wettability, ensuring swift Li<sup>+</sup> transfer diffusion while suppressing lithium dendrite growth. Remarkably, the Al-Li/LiF symmetric cell provides a cycle life exceeding 2300 h with a low polarization at 0.5 mA·cm<sup>−2</sup>. Furthermore, its enhanced cycling stability and capacity retention as well as capacity utilization stability pairing with LiFePO<sub>4</sub> and LiNi<sub>0.8</sub>Co<sub>0.1</sub>Mn<sub>0.1</sub>O<sub>2</sub> cathodes, highlighting the proposed approach as a promising solution for practical Li metal batteries.</p>

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Stable lithium metal batteries enabled by Al-Li/LiF composite artificial interfacial layer

  • 期刊论文

  • 发表日期：

    2025年3月25日

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  • Guojie Li,
  • Xuan Liang,
  • Junlong Zhang,
  • Bin Guo,
  • Baoguang Mao,
  • Hongming Sun,
  • Aoxuan Wang,
  • Qibo Deng,
  • Chuntai Liu

摘要

Lithium metal anode represents the ultimate solution for next-generation high-energy-density batteries but is plagued from commercialization by side reactions, substantial volume fluctuation, and the notorious growth of lithium dendrites. These hazardous issues are further aggravated under real-world conditions. In this study, a stable Al-Li/LiF artificial interphase with rapid ion transport pathways is created through a one-step chemical pretreatment process, effectively addressing these challenges simultaneously. As a consequence, the composite interfacial layer exhibits exceptional ionic conductivity, mechanical strength, and electrolyte wettability, ensuring swift Li+ transfer diffusion while suppressing lithium dendrite growth. Remarkably, the Al-Li/LiF symmetric cell provides a cycle life exceeding 2300 h with a low polarization at 0.5 mA·cm−2. Furthermore, its enhanced cycling stability and capacity retention as well as capacity utilization stability pairing with LiFePO4 and LiNi0.8Co0.1Mn0.1O2 cathodes, highlighting the proposed approach as a promising solution for practical Li metal batteries.