NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR MANUFACTURING SAME

A nonaqueous electrolyte secondary battery includes a positive electrode (4), a negative electrode (5), and a porous insulating layer (6). The porous insulating layer (6) is provided between the positive electrode (4) and the negative electrode (5). A tensile extension percentage of the positive electrode (4) is 3% or more. In other words, a positive electrode current collector (4A) contains an aluminum particle whose average particle size is 1 µm or more. A positive electrode mixture layer (4B) is provided on at least one surface of the positive electrode current collector (4A), and contains a positive electrode active material and an organic material whose melting point or softening point is higher than 200°C.