METHOD OF MANUFACTURING NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

PROBLEM TO BE SOLVED: To provide a non-aqueous electrolyte secondary battery superior in cycle life characteristics by suppressing the occurrence of buckling of an electrode group associated with expansion and shrinkage of a negative electrode active material. SOLUTION: After a positive electrode mixture slurry including a positive electrode active material is coated and dried on a positive electrode current collector 4A and a positive electrode mixture layer 4B is formed on the positive electrode current collector 4A, the positive electrode 4 in which the positive electrode mixture layer 4B is formed is rolled out. Then, the rolled positive electrode 4 is heat treated at a prescribed temperature, and the tensile elongation percentage of the positive electrode 4 after rolling is made 3.0% or more. The heat treatment after rolling is carried out at a temperature higher than a softening temperature of the positive electrode current collector 4A and higher than the softening temperature of a binder contained in the positive electrode mixture layer 4B, and lower than the decomposition temperature of the binder. COPYRIGHT: (C)2010,JPO&INPIT