Cathode active material, cathode including the same, solid secondary battery including the same, and method of preparing cathode active material

Abstract

A cathode active material, a cathode including the cathode active material, a solid secondary battery including the cathode, and a method of preparing the cathode active material are provided. The cathode active material includes primary particles including a Li2S-containing composite, secondary particles including the primary particles agglomerated therein, wherein a D10 size of the secondary particles is 5 μm or more.

Dependencies are inferred from the claim text.