SULFIDE-BASED ALL-SOLID-STATE BATTERY INCLUDING POSITIVE ELECTRODE ACTIVE MATERIAL COATED WITH LITHIUM NIOBATE PRECURSOR AND METHOD OF MANUFACTURING THE SAME

Disclosed herein are a sulfide-based all-solid-state battery and a method of manufacturing the same, wherein the sulfide-based all-solid-state battery includes a positive electrode active material coated with a lithium niobate precursor, which is manufactured by a polyol process having low production cost, such that it improves safety and increases capacity of the sulfide-based all-solid-state battery.