| abstract |
A nonaqueous electrolyte secondary battery improved in durability of a battery in a high capacity, high density and large area battery. A negative electrode comprising a positive electrode comprising a positive electrode active material layer including a positive electrode active material on the surface of a positive electrode collector and a negative electrode active material layer including a negative electrode active material on the surface of the negative electrode collector, , The ratio of the rated capacity to the void volume of the positive electrode active material layer is 1.40 Ah / cc or more, the ratio of the battery area to the rated capacity is 4.0 cm 2 / Ah or more, and the rated capacity is 30 Ah or more, Wherein the variation of the porosity in the non-aqueous electrolyte secondary cell is 6.0% or less. |