| 摘要 |
A battery separator and a non-aqueous electrolyte battery using the separator are provided that are capable of achieving thickness reduction while fulfilling an insulating function, an electrolyte retention function, and a shutdown function. A battery separator, to be impregnated with a non-aqueous electrolyte and interposed between a positive electrode and a negative electrode, includes a structure of a plurality of layered microporous films, at least one of which includes a reinforcement film made of a polyolefin-based material, and at least one of the rest of which includes a heat-resistance film made of a material having a melting point of 200° C. or higher. The value obtained by multiplying separator thickness (mum) by separator porosity (%) is restricted to 792 mum.% or greater. |
