Reversible Redistribution in Ag–Si Electrodes for Stable Anode-Free All-Solid-State Batteries

High Resolution Image Download MS PowerPoint Slide Anode-free all-solid-state batteries (AFASSBs) have emerged as promising candidates for next-generation energy storage systems due to their high safety and potential for exceptionally high gravimetric and volumetric energy densities. However, achieving long-term cycling stability remains a critical challenge because of nonuniform Li plating/stripping. A dual-component, bifunctional interfacial coating at the current collector/solid electrolyte interface, incorporating both a protective layer and seed sites, is considered critical for uniform Li plating and formation of a stable interface. Nevertheless, how the dual-component redistribution changes during cycling remains poorly understood, and design guidelines for effectively harnessing this phenomenon are still lacking. Here, we employ a gradient cosputtering approach to produce dual-el…