ACTIVE SUBSTANCE MATERIAL AND LITHIUM ION BATTERY

摘要

PROBLEM TO BE SOLVED: To provide an active substance material which is used for an electrochemical device utilizing Li ion conduction and capable of improving cycle stability.SOLUTION: Disclosed is an active substance material used for an electrochemical device utilizing Li ion conduction. The active substance material is provided which is characterized in having an active material capable of storing/releasing Li ions and an Na ionic conductor which is arranged on the surface of the active material and has a polyanion structure.