NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR MANUFACTURING SAME

摘要

Disclosed is a nonaqueous electrolyte secondary battery which comprises a positive electrode (4), a negative electrode (5) and a porous insulating layer (6). The porous insulating layer (6) is arranged between the positive electrode (4) and the negative electrode (5). The positive electrode (4) has a tensile elongation of not less than 3%. In other words, a positive electrode collector (4A) contains aluminum particles having an average crystal grain size of not less than 1 µm. A positive electrode mixture layer (4B) is formed on at least one surface of the positive electrode collector (4A), and contains a positive electrode active material and an organic material that has a melting point or softening point higher than 200°C.