| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery which has a high ratio of a low-SOC output with respect to a high-SOC output and a high energy density.SOLUTION: A nonaqueous electrolyte secondary battery has a positive electrode including a first active material containing a lithium transition metal complex oxide expressed by general formula LiNiMnCoO(x+y+z=1, x>0, y>0 and z>0), and a second active material containing LiFePO, and has a 1-kHz impedance equal to or less than 1.27 mΩ, which makes possible to offer a nonaqueous electrolyte secondary battery having a high ratio of a low-SOC output with respect to a high-SOC output, and a high energy density. |
