| 摘要 |
PURPOSE:To improve the charge/discharge cycle characteristic of a nonaqueous electrolyte secondary battery using lithium compound oxide as the positive electrode active material. CONSTITUTION:In a nonaqueous electrolyte secondary battery using LixMO2 (M represents at least one kind of transition metals, and desirably at least one kind of Co and Ni, and 0.05<=(x)<=1.10) as a positive electrode and using a carbon material, which can dope and dedope lithium, as the negative electrode active material, ratio of the carbon (CO3<2->) included in LixMO2 as the positive electrode active material is set 0.41weight% or less. |
