▎ 摘　　要

NOVELTY - A composite electrode (100) comprises first active material (10) and second active material (20), where the two active materials include different materials from each other, and content of first active material is 50-98 vol.% based on the total volume of the first and second active materials. First active material has a volume change rate of 0-30 vol.% according to volume expansion/contraction during a charging/discharging process, and second active material has a volume change rate of 35-1000 vol.% according to volume expansion/contraction during a charging/discharging process. USE - A composite electrode for an all-solid-state secondary battery (claimed). ADVANTAGE - The composite electrode includes two or more types of active materials having different mechanical and electrochemical properties, so that it is possible to implement a composite electrode with maximized energy density, and ultimately implement an all-solid state secondary battery with improved capacity and stability. The composite electrode does not include a solid electrolyte having high reactivity in a composite electrode, so that processability may be improved. DESCRIPTION OF DRAWING(S) - The drawing shows a conceptual view of a composite electrode for an all-solid-state secondary battery. First active material (10) Second active material (20) Composite electrode (100)