The Li metal anode has high theoretical specific capacity and low redox potential, making it suitable as an anode material for next-generation Li ion-based batteries (LIBs); however, challenges remain due to its unstable solid electrolyte interphase (SEI). In this study, we applied graphene-coated aramid attached to an uncoated aramid separator fabricated using a simple painting method to a Li metal anode to address the issues caused by the unstable SEI via fluorinated metathesis on a conjugated carbon network (CCN). The graphene-coated surface was partially fluorinated in a specific solvent environment, and as the Li⁺ ions were plated, the fluorinated surface induced formation of LiF as a chemically stable SEI component. Additionally, we demonstrated the successful application of fluorinated metathesis using other CCN materials, such as carbon black and activated carbon. The experimental results indicated that the CCN materials induced LiF via fluorination, and that the negative functionalities and lattice structure of the CCN materials affected the fluorination. These results demonstrated the effectiveness of this novel method for stabilizing a Li metal surface using a graphite pencil.

中文翻译：

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共轭碳网络上氟化复分解的高级锂金属阳极

锂金属阳极具有较高的理论比容量和较低的氧化还原电位，使其适合用作下一代锂离子基电池（LIB）的阳极材料。然而，由于其不稳定的固体电解质中间相（SEI），仍然存在挑战。在这项研究中，我们将附着有石墨烯的芳族聚酰胺与未涂覆的芳族聚酰胺隔板相连，该隔板采用简单的涂漆方法制成，并通过锂金属阳极通过共轭碳网络（CCN）上的氟化复分解解决了不稳定的SEI所引起的问题。石墨烯涂层的表面在特定的溶剂环境中部分氟化，并且作为Li ⁺电镀离子后，氟化表面诱导形成LiF作为化学稳定的SEI组分。此外，我们展示了使用其他CCN材料（例如炭黑和活性炭）成功完成氟化复分解的应用。实验结果表明，CCN材料通过氟化作用诱导了LiF，而CCN材料的负官能度和晶格结构影响了氟化作用。这些结果证明了使用石墨笔稳定锂金属表面的这种新方法的有效性。