Tailoring Artificial Solid Electrolyte Interphase via MoS2 Sacrificial Thin Film for Li-Free All-Solid-State Batteries

• First-ever fabrication of anode-free all-solid-state battery (AFASSB) structure using a MoS2 sacrificial layer. • MoS2 sacrificial layer reduces Li nucleation overpotential and enables favorable Li formation via Li2S and Mo interlayer. • AFASSB full cells with LiNi0.6Co0.2Mn0.2O2 cathodes show superior cycling stability and enhanced capacity compared to SUS. • Optimal MoS2 thickness yields 1.18-fold increase in initial discharge capacity and sevenfold improvement in capacity retention.