| 摘要 |
PROBLEM TO BE SOLVED: To provide a lithium secondary battery superior in charge/discharge characteristics by improving an active material used for a positive or negative electrode of the lithium secondary battery. SOLUTION: In this lithium secondary battery provided with positive and negative electrodes 1 and 2 and a nonaqueous electrolyte, an active material of the positive and negative electrodes 1 and 2 is used with tungsten oxides consisting of W20O58 or W18O49 or these containing Li, or tungsten composite oxides having a crystal structure of W20O58 type or W18O49 type containing W, O and at least one kind of metallic element selected from Mn, Cu, V, Cr, Fe, Co and Ni or these containing Li. |
