The lithium metal anode is a desirable choice owing to its high theoretical specific capacity. Despite their promising potential, lithium metal batteries (LMBs) face significant challenges in practical applications, such as uncontrolled growth of lithium dendrites and an unstable interface that occurs during repeated deposition and exfoliation of the lithium anode Therefore, this study employs a simple chemical immersion method, which can not only construct a Li-Ca alloy protective layer to improve lithium-ion transport but also provide a LiF-rich interface to further enhance the mechanical strength of the protective layer. The obtained Li-Ca alloy-LiF hybrid layer shows improved performance of the lithium anode. The results indicate that the Li-Li symmetric cell composed of the treated Li can undergo stable cycling over 3000 h under various cycling conditions and also exhibit excellent cycle performance in the Li-LiFePO₄ cell.

由于其高理论比容量，锂金属负极是理想的选择。尽管潜力巨大，但锂金属电池 (LMB) 在实际应用中仍面临重大挑战，例如锂枝晶的不受控制生长以及锂负极反复沉积和剥离过程中出现的不稳定界面。因此，本研究采用简单的化学浸没法，这不仅可以构建Li-Ca合金保护层以改善锂离子传输，还可以提供富含LiF的界面以进一步增强保护层的机械强度。获得的 Li-Ca 合金-LiF 混合层显示锂负极性能得到改善。结果表明，由处理过的 Li 组成的 Li-Li 对称电池可以稳定循环 3000 次以上 h 在各种循环条件下，并且在 Li-LiFePO ₄电池中也表现出优异的循环性能。