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    • 1. 发明授权
    • Separator for non-aqueous secondary battery and non-aqueous secondary battery
    • US10811657B2
    • 2020-10-20
    • US15774869
    • 2016-11-08
    • TEIJIN LIMITED
    • Susumu HondaSatoshi NishikawaTakashi Yoshitomi
    • H01M2/16H01M10/0525H01M4/13H01M4/02
    • There is provided a separator for a non-aqueous secondary battery, containing a porous substrate, and an adhesive porous layer that is provided on one side or both sides of the porous substrate, in which the adhesive porous layer contains a polyvinylidene fluoride type resin A including a vinylidene fluoride monomer unit and a hexafluoropropylene monomer unit, and a polyvinylidene fluoride type resin B including a vinylidene fluoride monomer unit and a hexafluoropropylene monomer unit, a proportion of the hexafluoropropylene monomer unit in the polyvinylidene fluoride type resin A is more than 1.5 mol % and 5 mol % or less with respect to a total amount of the vinylidene fluoride monomer unit and the hexafluoropropylene monomer unit of the polyvinylidene fluoride type resin A, a proportion of the hexafluoropropylene monomer unit in the polyvinylidene fluoride type resin B is more than 5 mol % and 15 mol % or less with respect to a total amount of the vinylidene fluoride monomer unit and the hexafluoropropylene monomer unit of the polyvinylidene fluoride type resin B, and a weighted average of a weight-average molecular weight of the polyvinylidene fluoride type resin A and a weight-average molecular weight of the polyvinylidene fluoride type resin B is from 600,000 to 2,000,000.