CATHODE ACTIVE MATERIAL FOR ALL-SOLID-STATE BATTERY, CATHODE FOR ALL-SOLID-STATE BATTERY, AND ALL-SOLID-STATE BATTERY COMPRISING SAME

The present invention relates to a positive electrode active material for an all-solid-state battery comprising a core capable of reversible adsorption and release of lithium ions and a coating layer formed on a surface of the core, wherein the coating layer comprises lithium carbon oxide represented by the Formula 1 below and lithium titanium oxide represented by Formula 2 below, a positive electrode for an all-solid-state battery comprising the positive electrode active material for an all-solid-state battery and a sulfide-based solid electrolyte, and an all-solid-state battery comprising a positive electrode, a negative electrode, and a solid electrolyte layer disposed between the positive electrode and the negative electrode, wherein the positive electrode comprises the positive electrode for an all-solid-state battery: [Formula 1] LiCO, wherein a is 0