Method of Manufacturing Negative Electrode for All-Solid-State Batteries

Disclosed is a method of manufacturing a negative electrode for all-solid-state batteries, the method including (a) preparing a powder mixture including a negative electrode active material, a solid electrolyte, and a conductive agent, (b) introducing the powder mixture into a reactor, (c) introducing an electrolytic solution into the reactor, and (d) forming a solid electrolyte interface (SEI) film while rotating the reactor, wherein the inner surface of the reactor is treated with lithium metal.