Method of Coating Solid Electrolyte of Solid-State Battery and Method of Manufacturing Electrode of Solid-State Battery Using the Same

A method of manufacturing an electrode of a solid-state battery, the method comprising:

• putting an electrode active material and a sulfide-based solid electrolyte into a rotating mixer;
• operating the rotating mixer to rotate in a first direction while the rotating mixer revolves in a second direction;
• coating a surface of the electrode active material with the sulfide-based solid electrolyte in the rotating mixer during the operating the rotating mixer, to form a solid electrolyte layer on the surface of the electrode active material;
• preparing an electrode slurry by additionally putting a solvent, a sulfide-based solid electrolyte, a conductive material, and a binder into the rotating mixer;
• and
• manufacturing the electrode by coating an electrode current collector with the electrode slurry.