Composition‐Controlled Cathode Protective Layer via Powder‐Atomic Layer Deposition for All‐Solid‐State Batteries (Adv. Sci. 4/2026)

Composition-Controlled Cathode Protective Layer The cover illustrates sulfide-based all-solid-state batteries employing cathode protective layers coated via powder-atomic layer deposition. The lithium zirconium oxide protective layers exhibit composition-dependent ionic and electronic conductivities, which directly govern cell performance. The image emphasizes the role of composition control as a fundamental design axis for cathode interface engineering, beyond conventional parameters such as film thickness and coating method. More details can be found in the Research Article by Hyo Rang Kang, Tae Joo Park, and co-workers (DOI: 10.1002/advs.202514583).