Nonaqueous electrolyte secondary battery

A nonaqueous electrolyte secondary battery comprising:

• a positive electrode comprising a positive electrode current collector having a first surface and a first positive electrode active material layer provided on a part of the first surface;
• a negative electrode comprising a negative electrode current collector having a second surface opposed to the first surface and a first negative electrode active material layer provided on a part of the second surface;
• and
• a nonaqueous electrolyte,
• wherein the negative electrode current collector comprises a second coated portion on which the first negative electrode active material layer is provided and a second noncoated portion which is adjacent to the second coated portion in a direction parallel to the second surface, in which the first negative electrode active material layer is not present;
• the second noncoated portion is adjacent to at least an edge of the negative electrode current collector and extends along the at least an edge;
• a length from a boundary between the second coated portion and the second noncoated portion to the at least an edge of the negative electrode current collector is within a range of 5 mm to 20 mm;
• a density of the first negative electrode active material layer is within a range of 2.1 g/cc to 2.4 g/cc;
• and
• a ratio W1/W2 of a mass of the second coated portion of the negative electrode current collector per unit area (W1) to a mass of the second noncoated portion of the negative electrode current collector per unit area (W2) is from 0.997 to 1
• wherein the battery is obtained by a process comprising tension processing on the negative electrode.