| 摘要 |
<p>The purpose of the present invention is to provide a separator which exhibits high ionic conductivity and excellent durability, and a secondary battery. This separator, which comprises a porous film, and a layer comprising a fluorine-containing polymer comprising vinylidene fluoride-based polymerization units and tetrafluoroethylene-based polymerization units, is characterized in that: the fluorine-containing polymer includes 80.0-89.0 mol% of the vinylidene fluoride-based polymerization units with respect to all of the polymerization units; and the fluorine-containing polymer has a weight average molecular weight in the range of 50000-2000000.</p> |
