Non-aqueous secondary battery
A non-aqueous secondary battery, containing a positive electrode, a negative electrode, an insulating layer that is a single layer contacting the positive electrode on one side and the negative electrode on another side, and an electrolyte, in which (1) the insulating layer includes a polyvinylidene fluoride type resin and inorganic particles, the Mw of the polyvinylidene fluoride type resin is 900,000 to 1,500,000, and a content ratio of the inorganic particles in the insulating layer is 50% by mass to less than 90% by mass; (2) the insulating layer includes a resin and inorganic particles and has a thickness of 5 to 30 μm, and the inorganic particles include metal sulfate particles; or (3) the insulating layer includes a polyvinylidene fluoride type resin and inorganic particles, the polyvinylidene fluoride type resin contains, as polymerizing components, vinylidene fluoride and a monomer represented by the following formula (1):
1 . A non-aqueous secondary battery, comprising:
a positive electrode;
a negative electrode;
an insulating layer that is a single layer contacting the positive electrode on one side and contacting the negative electrode on another side, the insulating layer comprising a polyvinylidene fluoride type resin and inorganic particles; and
an electrolyte,
wherein a content ratio of the polyvinylidene fluoride type resin in the insulating layer is 100% by mass based on a total amount of all resins contained in the insulating layer,
wherein a weight-average molecular weight of the polyvinylidene fluoride type resin contained in the insulating layer is from 900,000 to 1,500,000, and
wherein a content ratio of the inorganic particles in the insulating layer is from 50% by mass to less than 90% by mass, and
wherein a mass per unit area of the insulating layer is from 9 g/m 2 to less than 40 g/m 2 .
2 . The non-aqueous secondary battery according to claim 1 , wherein the inorganic particles contain at least one selected from the group consisting of metal hydroxide particles and metal sulfate particles.
3 . The non-aqueous secondary battery according to claim 1 , wherein an average primary particle size of the inorganic particles contained in the insulating layer is from 0.01 μm to less than 1.00 μm.
4 . The non-aqueous secondary battery according to claim 1 , wherein a thickness of the insulating layer is from 5 μm to 30 μm.
5 . The non-aqueous secondary battery according to claim 1 , wherein a porosity of the insulating layer is from 40% to less than 80%.
6 . The non-aqueous secondary battery according to claim 1 , wherein the non-aqueous secondary battery obtains electromotive force by lithium doping and dedoping.
7 . A non-aqueous secondary battery, comprising:
a positive electrode;
a negative electrode;
an insulating layer that is a single layer contacting the positive electrode on one side and contacting the negative electrode on another side, the insulating layer comprising a polyvinylidene fluoride type resin and inorganic particles, the polyvinylidene fluoride type resin comprising, as polymerizing components, vinylidene fluoride and a monomer represented by the following formula (1); and
an electrolyte,
wherein a content ratio of the polyvinylidene fluoride type resin in the insulating layer is 100% by mass based on a total amount of all resins contained in the insulating layer, and
wherein a thickness of the insulating layer is from 10 μm to 30 μm:
wherein, in Formula (1), each of R 1 , R 2 , and R 3 independently represents a hydrogen atom, a halogen atom, a C 1-5 alkyl group, a carboxyl group or a derivative of a carboxyl group; X represents a single bond, a C 1-5 alkylene group, or a substituted C 1-5 alkylene group; and Y represents a hydrogen atom, a C 1-5 alkyl group, a C 1-5 alkyl group that contains at least one hydroxy group, a C 1-5 alkyl group that contains at least one carboxyl group, or —R—O—C(═O)—(CH 2 ) n —C(═O)—OH, wherein R represents a C 1-5 alkylene group and n represents an integer of 0 or more.
8 . The non-aqueous secondary battery according to claim 7 , wherein a mass per unit area of the insulating layer is from 4 g/m 2 to less than 40 g/m 2 .
9 . The non-aqueous secondary battery according to claim 7 , wherein a content ratio of the inorganic particles in the insulating layer is from 50% by mass to less than 90% by mass.
10 . A non-aqueous secondary battery, comprising:
a positive electrode;
a negative electrode;
an insulating layer that is a single layer contacting the positive electrode on one side and contacting the negative electrode on another side, the insulating layer comprising a polyvinylidene fluoride type resin and inorganic particles; and
an electrolyte,
wherein a weight-average molecular weight of the polyvinylidene fluoride type resin contained in the insulating layer is from 900,000 to 1,500,000,
wherein a content ratio of the polyvinylidene fluoride type resin in the insulating layer is 100% by mass based on a total amount of all resins contained in the insulating layer,
wherein the polyvinylidene fluoride type resin is a VDF-HFP binary copolymer,
wherein a thickness of the insulating layer is from 5 μm to 30 μm, and
wherein the inorganic particles include metal sulfate particles.
11 . The non-aqueous secondary battery according to claim 10 , wherein an average primary particle size of the metal sulfate particles is from 0.01 μm to 1.00 μm.