| abstract |
(57) [Summary] [PROBLEMS] To increase the energy amount of a lithium secondary battery and increase the cycle life. SOLUTION: The negative electrode material is a compound containing a silicon atom capable of inserting and releasing lithium, and the positive electrode active material is Co, N containing one or more metals selected from i, Mn, and Fe A non-aqueous secondary battery comprising a lithium-containing transition metal composite oxide having a layered structure of NaFeO 2 type or spinel type. |