| abstract |
The object of the present invention is to provide a secondary battery separator exhibiting adhesion to electrodes and dimensional stability at low cost. The layer has a porous layer, and the porous layer contains fluororesin particles and inorganic particles, and the fluororesin particles use a fluororesin with a weight average molecular weight of 100,000 to 5 million and an average particle diameter of 0.01 μm to 1.00 μm or less, the average particle diameter of the inorganic particles is not less than 0.10 μm and not more than 5.0 μm. |