Interfacial engineering of sulfide solid electrolytes for long-cycle lithium-metal batteries

Abstract

Sulfide solid electrolytes offer high ionic conductivity but suffer from interfacial degradation against lithium metal. We report an atomic-layer-deposited oxyhalide interlayer that suppresses dendrite nucleation and reduces interfacial resistance by an order of magnitude. Symmetric cells cycled stably for over 2,000 hours at practical current densities.

Keywords

• solid-state batteries
• electrolytes
• interfaces
• energy storage