Patent ID: 8105396
Filing Date: 2012-01-31
Classification: H01M,Y02E,Y02P,Y02T,Y10T

Abstract:
1. A method for fabricating a nonaqueous electrolyte secondary battery having an electrode group including a positive electrode including a positive electrode current collector and a positive electrode active material formed on the positive electrode current collector, a negative electrode including a negative electrode current collector and a negative electrode active material formed on the negative electrode current collector, and a porous insulating layer, the electrode group being formed by winding or stacking the positive electrode and the negative electrode with the porous insulating layer interposed, wherein the positive electrode is formed by: coating the positive electrode current collector with positive electrode material mixture slurry containing the positive electrode active material, and drying the slurry; rolling the positive electrode current collector coated with the dried positive electrode material mixture slurry; and performing heat treatment on the rolled positive electrode current collector at 200° C. or more, the positive electrode has a tensile extension equal to or higher than 3.0%, and the porous insulating layer is made of a material containing aramid resin.