In Situ Constructed 3D Lithium Anodes for Long-Cycling All-Solid-State Batteries

摘要

Constructing a 3D lithium metal anode has been demonstrated to be the mosteffective strategy to address its dendrite issue in liquid batteries. However,this promising approach has proved challenging to inherit in all-solid-state Limetal batteries (ASSLMBs) because of the rigidity of inorganic solidelectrolytes (Ses), which constrains interfacial solid–solid ionic contact.Herein, a 3D Li anode is in situ constructed for ASSLMBs by spontaneouschemical reactions between halide Ses and Li metal. The in situ formed Li–Alalloys and well-maintained sulfide Ses inside the 3D structure serve ascontinuous electron and Li~+ transport pathways and facilitate thehomogenous distribution of charge carriers. The lithiophilic Li alloy canregulate Li deposition behavior and enable uniform Li nucleation anddeposition. Both the Li‖Li symmetric and full batteries exhibit goodelectrochemical performance at high current density. This work provides auniversal strategy and new insight perspective to construct 3D Li forhigh-performance ASSLMBs.