In Situ Building Halide‐Alloy Dual‐Phase Interfaces for Dendrite‐Free Sulfide Solid‐State Batteries

cathode, full cells retain 80% capacity retention after 1000 cycles at 0.5 C with an ultra-thin 50 µm Li anode. This study highlights the effectiveness of engineered surface coating layers in stabilizing the anode interface with minimal disruption to the sulfide electrolyte framework.