COMPOSITE ELECTRODE ACTIVE MATERIAL, ELECTRODE COMPOSITION, ELECTRODE SHEET FOR ALL-SOLID-STATE SECONDARY BATTERY AND ALL-SOLID-STATE SECONDARY BATTERY, AND METHODS FOR MANUFACTURING COMPOSITE ELECTRODE ACTIVE MATERIAL, ELECTRODE SHEET FOR ALL-SOLID-STATE SECONDARY BATTERY, AND ALL-SOLID-STATE SECONDARY BATTERY

WIPO Patent Application WO/2020/203545

A1

Provided are a composite electrode active material including an active material and a covering layer covering the active material, an electrode composition, an electrode sheet for an all-solid-state secondary battery, and an all-solid-state secondary battery, and methods for manufacturing the composite electrode active material, the electrode sheet for an all-solid-state secondary battery and the all-solid-state secondary battery, wherein: the covering layer contains an inorganic solid electrolyte and a conduction promoting agent; and lithium atoms and carbon atoms contained in the covering layer satisfy a relationship defined by formula (I) in relation to the number of atoms.　Formula (I) A1