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<p>Lithium metal anodes suffer from unstable interfacial behavior during repeated cycling, which limits their application in high-energy-density batteries. Herein, an AlN-PVDF composite layer was fabricated on Li metal anodes via a spray-coating process, and its influence on electrochemical performance was investigated. The AlN-PVDF coating did not alter the initial charge/discharge behavior of the cells. Compared with bare Li metal anodes, cells employing the AlN-PVDF@Li anode exhibited a smaller charge/discharge voltage hysteresis and improved cycling stability. In full cells assembled with NMC622 cathodes, the AlN-PVDF@Li anode retained approximately 116 mAh g<sup>− 1</sup> after 200 cycles at 5&#xa0;C, corresponding to a capacity loss of ~ 20%, whereas the bare Li cell retained only ~ 94 mAh g<sup>− 1</sup> (~ 30% loss). These results demonstrate that a simple AlN-PVDF surface modification can effectively improve the electrochemical stability of Li metal anodes in full-cell configurations.</p><p>.</p>

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AlN-PVDF composite protective coating for stabilizing lithium metal anodes in lithium metal batteries

  • 期刊论文

  • 发表日期：

    2026年7月14日

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  • Seul Ki Choi,
  • Yun Seung Nah,
  • Minho Yang

摘要

Lithium metal anodes suffer from unstable interfacial behavior during repeated cycling, which limits their application in high-energy-density batteries. Herein, an AlN-PVDF composite layer was fabricated on Li metal anodes via a spray-coating process, and its influence on electrochemical performance was investigated. The AlN-PVDF coating did not alter the initial charge/discharge behavior of the cells. Compared with bare Li metal anodes, cells employing the AlN-PVDF@Li anode exhibited a smaller charge/discharge voltage hysteresis and improved cycling stability. In full cells assembled with NMC622 cathodes, the AlN-PVDF@Li anode retained approximately 116 mAh g− 1 after 200 cycles at 5 C, corresponding to a capacity loss of ~ 20%, whereas the bare Li cell retained only ~ 94 mAh g− 1 (~ 30% loss). These results demonstrate that a simple AlN-PVDF surface modification can effectively improve the electrochemical stability of Li metal anodes in full-cell configurations.

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