Constructing a 3D lithium metal anode has been demonstrated to be the most effective strategy to address its dendrite issue in liquid batteries. However, this promising approach has proved challenging to inherit in all-solid-state Li metal batteries (ASSLMBs) because of the rigidity of inorganic solid electrolytes (SEs), which constrains interfacial solid–solid ionic contact. Herein, a 3D Li anode is in situ constructed for ASSLMBs by spontaneous chemical reactions between halide SEs and Li metal. The in situ formed Li–Al alloys and well-maintained sulfide SEs inside the 3D structure serve as continuous electron and Li⁺ transport pathways and facilitate the homogenous distribution of charge carriers. The lithiophilic Li alloy can regulate Li deposition behavior and enable uniform Li nucleation and deposition. Both the Li||Li symmetric and full batteries exhibit good electrochemical performance at high current density. This work provides a universal strategy and new insight perspective to construct 3D Li for high-performance ASSLMBs.

中文翻译：

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用于长循环全固态电池的原位构建 3D 锂阳极

构建 3D 锂金属阳极已被证明是解决液体电池中枝晶问题的最有效策略。然而，事实证明，这种有希望的方法在全固态锂金属电池（ASSLMB）中继承具有挑战性，因为无机固体电解质（SE）的刚性限制了界面固-固离子接触。在此，通过卤化物SE和锂金属之间的自发化学反应，为ASSLMB原位构建了3D Li阳极。3D结构内原位形成的Li-Al合金和维护良好的硫化物SE充当连续电子和Li ⁺传输路径并促进电荷载流子的均匀分布。亲锂锂合金可以调节锂沉积行为并实现均匀的锂成核和沉积。Li||Li对称电池和全电池在高电流密度下均表现出良好的电化学性能。这项工作提供了构建高性能 ASSLMB 的 3D Li 的通用策略和新的洞察视角。