Patent ID: 8389161

Claim:
A nonaqueous electrolyte secondary battery, comprising: a positive electrode including a positive electrode current collector and a positive electrode mixture layer including a positive electrode active material and a binder, the positive electrode mixture layer being provided on the positive electrode current collector; a negative electrode; a porous insulating layer interposed between the positive electrode and the negative electrode; and a nonaqueous electrolyte, wherein: a tensile extension of the positive electrode in a state in which the positive electrode mixture layer is formed on the positive electrode current collector is equal to or higher than 3.0% and 6.5% or less, a charge end voltage in normal operation is equal to or higher than 4.3 V and equal to or lower than 4.5V, the positive electrode current collector is made of aluminum containing iron, and a content of the iron contained in the positive electrode current collector is equal to or higher than 1.20 wt % and equal to or lower than 1.70 wt %.