Nonaqueous electrolyte secondary battery

A nonaqueous electrolyte secondary battery, comprising:

• a positive electrode;
• a negative electrode;
• a separator that insulates the positive electrode and the negative electrode;
• and a nonaqueous electrolyte,
• wherein the positive electrode includes:
• a positive electrode collector;
• a positive electrode active material layer containing a positive electrode active material and provided on part of the surface of the positive electrode collector;
• and
• an insulating layer provided on another part of the surface of the positive electrode collector, so as to be adjacent to the positive electrode active material layer;
• the negative electrode includes:
• a negative electrode collector;
• and
• a negative electrode active material layer containing a negative electrode active material and provided on part of the surface of the negative electrode collector;
• a width of the negative electrode active material layer is wider than a width of the positive electrode active material layer, and
• the insulating layer contains an inorganic filler and a binder;
• protrudes outward in a width direction from the negative electrode active material layer;
• and is configure to exhibit a value of 13% or less of a thermal shrinkage factor in a direction parallel to the surface of an evaluation sample of an insulating layer formed to a square shape having a length of each side of 5 cm and heated at 150° C. for 1 hour.