US 12,074,339 B2
Separator including porous substrate, heat resistant porous layer, and adhesive layer, and non-aqueous secondary battery including the same
Tomoya Hamada, Osaka (JP); and Susumu Honda, Osaka (JP)
Assigned to TEIJIN LIMITED, Osaka (JP)
Appl. No. 16/958,533
Filed by TEIJIN LIMITED, Osaka (JP)
PCT Filed Nov. 30, 2018, PCT No. PCT/JP2018/044319
§ 371(c)(1), (2) Date Jun. 26, 2020,
PCT Pub. No. WO2019/130994, PCT Pub. Date Jul. 4, 2019.
Claims priority of application No. 2017-252241 (JP), filed on Dec. 27, 2017; application No. 2017-252242 (JP), filed on Dec. 27, 2017; application No. 2017-252243 (JP), filed on Dec. 27, 2017; and application No. 2017-252244 (JP), filed on Dec. 27, 2017.
Prior Publication US 2021/0057703 A1, Feb. 25, 2021
Int. Cl. H01M 50/446 (2021.01); H01M 10/0525 (2010.01); H01M 50/417 (2021.01); H01M 50/42 (2021.01); H01M 50/426 (2021.01); H01M 50/443 (2021.01); H01M 50/451 (2021.01); H01M 50/457 (2021.01); H01M 50/489 (2021.01); H01M 50/491 (2021.01); H01M 50/494 (2021.01)
CPC H01M 50/446 (2021.01) [H01M 10/0525 (2013.01); H01M 50/417 (2021.01); H01M 50/42 (2021.01); H01M 50/426 (2021.01); H01M 50/443 (2021.01); H01M 50/451 (2021.01); H01M 50/457 (2021.01); H01M 50/494 (2021.01); H01M 50/489 (2021.01); H01M 50/491 (2021.01)] 19 Claims
OG exemplary drawing
 
1. 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 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 comprising the porous substrate and the heat resistant porous layer, wherein adhesive resin particles adhere to the layered body,
wherein the heat resistant porous layer includes:
an inner layer formed on the porous substrate and containing inorganic particles and at least one selected from the group consisting of a wholly aromatic polyamide, a polyamide imide, and a polyimide, wherein the at least one selected from the group consisting of a wholly aromatic polyamide, a polyamide imide and a polyimide in the inner layer is the same as the at least one selected from the group consisting of a wholly aromatic polyamide, a polyamide imide and a polyimide in the porous coating film; and
the porous coating film formed so as to cover an outer surface of the inner layer;
wherein the porous coating film is a resin portion forming an outer surface of the heat resistant porous layer and spreading like a film in which plural pores are formed in the resin portion, and
wherein the inner layer and the porous coating film satisfy the relationship: a porosity of inner layer>a porosity of porous coating film.