CATHODE ACTIVE MATERIAL FOR ALL-SOLID-STATE BATTERY COMPRISING COATING LAYER INCLUDING TERNARY OXIDE AND METHOD OF MANUFACTURING SAME

A cathode active material for an all-solid-state battery includes: active material particles; and a coating layer covering at least a portion of the surface of the active material particles, wherein the coating layer includes lithium (Li), niobium (Nb), and at least one element selected from the group consisting of vanadium (V), zirconium (Zr) and combinations thereof.