The present application provides a lithium-ion battery positive electrode plate, comprising a positive electrode current collector and a positive electrode film layer disposed on at least one surface of the positive electrode current collector, wherein the...

A layered body includes: a substrate; and an oxide portion positioned on the substrate. An oxide that constitutes the oxide portion contains at least two or more rare-earth elements: silicon; and oxygen. The oxide that is contained in the oxide portion exh...

An electrolyte (16) is single crystal composed of La 9.33 Si 6 O 26 in which the crystal is oriented in the c-axis, and the c-axis is in the thickness direction of the electrolyte (16). In the electrolyte (16), the oxide ion is preferentially migrated in t...