| 摘要 |
PROBLEM TO BE SOLVED: To provide a reliable nonaqueous electrolyte secondary battery.SOLUTION: In a nonaqueous electrolyte secondary battery, which is proposed herein, a positive electrode current collector foil is provided with uneven portions. In the uneven portions, the interval A of the recess or projecting portions is in a range given by: 0.5 μm≤A≤1.0 μm. A positive electrode active material layer includes positive electrode active material particles, of which the average particle diameter B (D50) is in a range given by: 3 μm≤B≤12 μm. In addition, the viscosity C of a nonaqueous electrolyte is in a range given by: 1.5 mPa s≤C≤5.0 mPa s. |
