Non-aqueous electrolyte secondary battery and method of producing the same

摘要

A non-aqueous electrolyte secondary battery comprises at least a negative electrode (5), a positive electrode (3), and a non-aqueous electrolyte with lithium ion conductivity, wherein a composite oxide containing lithium represented by a composition formula LixSi1-yMyOz is used as an active material of said negative electrode, wherein M represents one or more oxide-forming elements other than alkali metals and silicon 0