Separator for non-aqueous secondary battery and non-aqueous secondary battery
AssigneeTeijin Limited
InventorsSusumu Honda, Satoshi Nishikawa
Life of this patent
Estimating the term…
Abstract
An embodiment of the present invention provides 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 binder resin and inorganic particles, the inorganic particles having an average primary particle diameter from 0.01 μm to less than 0.45 μm; and an adhesive layer that is provided on one side or on both sides of a laminated body of the porous substrate and the heat-resistant porous layer, and adhesive resin particles adhered to the laminated body.
Claims14
A separator for a non-aqueous secondary battery, the separator comprising:
- 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 binder resin and inorganic particles, the inorganic particles having an average primary particle diameter from 0.01 μm to less than 0.45 μm;
- and
- an adhesive layer that is provided on one side or on both sides of a laminated body of the porous substrate and the heat-resistant porous layer, the adhesive layer comprising a plurality of adhesive resin particles adhered to the laminated body,
- wherein the binder resin contains at least one selected from the group consisting of a wholly aromatic polyamide, a polyamideimide, a polyether sulfone, a polysulfone, a polyether ketone, a polyketone, a polyether imide, and a copolymerized polyether polyamide,
- wherein a mass ratio of the inorganic particles in the heat-resistant porous layer is 50% by mass to 90% by mass with respect to a total mass of the heat-resistant porous layer,
- wherein a mass per unit area of the heat-resistant porous layer as a total of both sides is from 2.0 g/m2 to 10.0 g/m2, and
- wherein the inorganic particles contain at least one of magnesium hydroxide particles or barium sulfate particles.
A separator for a non-aqueous secondary battery, the separator comprising:
- 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 binder resin and inorganic particles, the inorganic particles having an average primary particle diameter from 0.01 μm to less than 0.45 μm;
- and
- an adhesive layer that is provided on one side or on both sides of a laminated body of the porous substrate and the heat-resistant porous layer, the adhesive layer comprising a plurality of adhesive resin particles adhered to the laminated body,
- wherein the adhesive resin particles contain first adhesive resin particles including a polyvinylidene fluoride type resin and/or second adhesive resin particles including an acrylic type resin,
- wherein a mass ratio of the inorganic particles in the heat-resistant porous layer is 50% by mass to 90% by mass with respect to a total mass of the heat-resistant porous layer,
- wherein a mass per unit area of the heat-resistant porous layer as a total of both sides is from 2.0 g/m2 to 10.0 g/m2, and
- wherein the inorganic particles contain at least one of magnesium hydroxide particles or barium sulfate particles.
Dependencies are inferred from the claim text.