Metallic lithium (Li) has attracted considerable interest as a high‐capacity anode material for the next‐generation Li‐metal batteries, yet its commercial availability is still challenged by its strong reactivity with electrolyte and uncontrollable growth of Li dendrites. Herein, a tuned Li anode is fabricated through a facile surface modification strategy. The LiF‐dominant artificial coating layer, due to its low surface‐diffusion energy barrier and excellent chemical stability against Li and electrolyte, is efficient in stabilizing the solid‐electrolyte interphase (SEI) and directing homogeneous Li stripping/plating upon repeated cycling. Therefore, it significantly mitigates the corrosion reaction on the anode side and restrains the Li dendrite growth, contributing to suppressed anode degradation. As a result, the tuned Li metal achieves high symmetric cell performance, delivering a substantially decreased voltage overpotential of 37 mV over 3000 h of cycling (>4 months) at high current density (up to 8 mA cm⁻²). Moreover, the assembled high‐loading Li–S pouch cells (200 mg of sulfur) using the tuned Li anode approach a high capacity (up to 189 mA h) together with good electrochemical cyclability. This work presents a viable route to regulate the Li surface chemistry and interface property for dendrite‐free Li‐metal anodes.

中文翻译：

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锂硫电池无树突状锂金属阳极的人工保护涂层

金属锂（​​Li）作为下一代锂金属电池的高容量负极材料已经引起了广泛的关注，但是其与电解质的强反应性和Li树枝状晶体的不可控制的增长仍对其商业可用性构成挑战。本文中，通过容易的表面改性策略来制造调谐的Li阳极。LiF为主的人工涂层由于其低的表面扩散能垒和出色的对Li和电解质的化学稳定性，可有效地稳定固体电解质中间相（SEI）并在重复循环中指导均匀的Li汽提/镀覆。因此，它显着减轻了阳极侧的腐蚀反应并抑制了锂枝晶的生长，从而有助于抑制阳极退化。结果是，^-2）。此外，使用调谐的Li阳极组装的高负荷Li-S袋式电池（200 mg硫）具有高容量（高达189 mA h）和良好的电化学循环性。这项工作为调节无枝晶锂金属阳极的锂表面化学性质和界面性质提供了一条可行的途径。