Teijin Limited

Rika Kuratani

Satoshi Nishikawa

Megumi Sato

Susumu Honda

Hiroshi Sakurai

Takashi Yoshitomi

Yu Nagao

Masato Okazaki

An embodiment of the invention provide a separator for a non-aqueous secondary battery, including a porous substrate; and a heat-resistant porous layer that is provided on one side or on both sides of the porous substrate, and that contains a binder resin and barium sulfate particles, in which an average primary particle diameter of the barium sulfate particles contained in the heat-resistant porous layer is from 0.01 μm to less than 0.30 μm, and in which a volume ratio of the barium sulfate particles in the heat-resistant porous layer is from 30% by volume to less than 50% by volume.

Separator for non-aqueous secondary battery and non-aqueous secondary battery

An embodiment according to the invention provides a separator for a non-aqueous secondary battery, containing a porous substrate and an adhesive porous layer that contains resin A and resin B1; (1) resin A: a copolymer containing vinylidene fluoride (VDF) and hexafluoropropylene (HFP), in which a molar content of HFP monomer unit with respect to a total molar quantity of VDF monomer unit and HFP monomer unit is from more than 1.5 mol % to 3.5 mol %, and (2) resin B1: a copolymer containing VDF, HFP, and a monomer of formula (1), in which a molar content of HFP monomer unit with respect to a total molar quantity of VDF monomer unit, HFP monomer unit, and a monomer unit of formula (1) is from more than 3.5 mol % to 15 mol % (Rto R: H, a halogen atom, a carboxyl group, etc., or a Calkyl group; X: a single bond, a Calkylene group, etc., Y: H, a Calkyl group, etc.):

Provided is a separator for a non-aqueous secondary battery containing a porous substrate; and an adhesive porous layer that is provided on one side or on both sides of the porous substrate, and that contains a polyvinylidene fluoride type resin, an acrylic type resin and metal sulfate particles, in which an average primary particle diameter of the metal sulfate particles contained in the adhesive porous layer is from 0.01 μm to less than 0.30 μm.

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 including a vinylidene fluoride monomer unit and a hexafluoropropylene monomer unit, and the polyvinylidene fluoride type resin has an acid value of from 3.0 mgKOH/g to 20 mgKOH/g.

Provided is a separator for a non-aqueous secondary battery, including: a porous substrate having an average pore diameter of from 20 nm to 100 nm; and a porous layer provided on one or both sides of the porous substrate and including a polyvinylidene fluoride resin and a filler, the porous layer including a filler in an amount of from 45% by volume to 75% by volume with respect to a total solid content of the porous layer, a weight average molecular weight of the polyvinylidene fluoride resin being 1,000,000 or more, and a peel strength between the porous substrate and the porous layer being 0.20 N/12 mm or more.

Separator for a non-aqueous secondary battery, and non-aqueous secondary battery

A separator for a nonaqueous secondary battery, including a porous substrate and an adhesive porous layer that is formed on at least one side of the porous substrate and contains a carbon material and a polyvinylidene fluoride resin. The separator has an initial static voltage of 0 V as measured in accordance with JIS L1094.

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Osaka, Japan

Rika Kuratani