Sodium Halide Nanocomposite Electrolyte for Stable Ion Conduction

The patent uses a composite structure consisting of a sulfide-based solid electrolyte core and an oxide-based coating layer. The sulfide core provides high ionic conductivity while the oxide coating layer provides electrochemical stability and atmospheric stability. This composite approach allows both requirements to be satisfied simultaneously by assigning different functions to different components of the system.

The patent creates a composite material where the oxide-based coating layer is applied on the surface of the sulfide-based solid electrolyte. The bulk sulfide material maintains high ionic conductivity while the surface oxide layer provides the required electrochemical stability. This spatial separation of functions resolves the contradiction between stability and conductivity.

Instead of attempting to improve halide-based electrolytes through complex substitution methods, the patent adopts a simpler composite approach: combining sulfide-based electrolyte (for high conductivity) with oxide-based coating (for stability). This composite strategy achieves the desired performance level more directly without requiring complex manufacturing processes.