abstract |
A separator for a non-aqueous secondary cell provided with a porous base material and an adhesive porous layer provided on one or both surfaces of the porous base material, the adhesive porous layer containing a polyvinylidene fluoride resin. In the adhesive porous layer, the ratio of the area intensity of the β-crystal-derived peak of the polyvinylidene fluoride resin to the total of the area intensity of the α-crystal-derived peak of the polyvinylidene fluoride resin and the area intensity of the β-beta-crystal-derived peak of the polyvinylidene fluoride resin is 10-100%. |