Dual‐Seed Strategy for High‐Performance Anode‐Less All‐Solid‐State Batteries

Abstract Interest in all‐solid‐state batteries (ASSBs), particularly the anode‐less type, has grown alongside the expansion of the electric vehicle (EV) market, because they offer advantages in terms of their energy density and manufacturing cost. However, in most anode‐less ASSBs, the anode is covered by a protective layer to ensure stable lithium (Li) deposition, thus requiring high temperatures to ensure adequate Li ion diffusion kinetics through the protective layer. This study proposes a dual‐seed protective layer consisting of silver (Ag) and zinc oxide (ZnO) nanoparticles for sulfide‐based anode‐less ASSBs. This dual‐seed‐based protective layer not only facilitates Li diffusion via multiple lithiation pathways over a wide range of potentials, but also enhances the mechanical stability of the anode interface through the in situ formation of a Ag–Zn alloy with high ductility. The ca…