Teijin Limited

Tomoya Hamada

Susumu Honda

Satoshi Nishikawa

Takashi Yoshitomi

Yoshimitsu Takano

Provided is a separator for a non-aqueous secondary battery, containing a porous substrate; a heat resistant porous layer that is provided on one side or on both sides of the porous substrate, and that contains a porous coating film including at least one selected from the group consisting of a wholly aromatic polyamide, a polyamide imide and a polyimide; and an adhesive layer that is provided on one side or on both sides of a layered body containing the porous substrate and the heat resistant porous layer, in which adhesive resin particles adhere to the layered body, and provided is a separator for a non-aqueous secondary battery, containing a porous substrate; a heat resistant porous layer that is provided on one side or on both sides of the porous substrate, and that contains at least one of inorganic particles or a heat resistant resin, the heat resistant resin having at least one of an amide bond or an imide bond in a molecule; and an adhesive layer that is provided on one side or on both sides of a layered body containing the porous substrate and the heat resistant porous layer, wherein adhesive resin particles adhere to the layered body, in which a peel strength between the porous substrate and the heat resistant porous layer is from 5 N/m to 75 N/m.

Separator including porous substrate, heat resistant porous layer, and adhesive layer, and non-aqueous secondary battery including the same

A separator includes a porous substrate, and a porous layer formed on one or both surfaces of the substrate and containing a polyvinylidene fluoride type resin and a filler, in which the filler content in the porous layer is from 30 to 80% by mass with respect to the total mass of the polyvinylidene fluoride type resin and the filler, and the polyvinylidene fluoride type resin is at least one resin selected from the following resin A and B:

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Osaka, Japan

Tomoya Hamada