Non-aqueous secondary battery and portable equipment using the same
View Patent ↗A non-aqueous secondary battery is provided, which has excellent overcharging safety, less generation of gas during storage at a high temperature, and can ensure storage reliability. A non-aqueous secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte solution, wherein the non-aqueous electrolyte solution contains a compound A in which a halogen group is bonded to a benzene ring and an aromatic or/and heterocyclic compound B oxidized at a potential lower than that of the compound A, a content of the compound A with respect to the total non-aqueous electrolyte solution is 1% by mass to 15% by mass, and a content of the compound B with respect to the total non-aqueous electrolyte solution is 0.005% by mass to 3% by mass.
1. A non-aqueous secondary battery comprising a positive electrode, a negative electrode, a non-aqueous electrolyte solution, and a separator,
wherein the non-aqueous electrolyte solution contains a compound A in which a halogen group is bonded to a benzene ring, a compound B oxidized at a potential lower than that of the compound A, and a compound having a —OSO 2 bond
the compound B is at least one selected from an aromatic compound and a heterocyclic compound
the positive electrode contains a positive mixture, the positive mixture contains a carbon material as a conductive auxiliary agent, and a content of the carbon material with respect to the total positive mixture is not more than 5% by mass, and
when the compound B is the heterocyclic compound, the heterocyclic compound is at least one selected from the group consisting of methylpyrrole and furan.
2. The non-aqueous secondary battery according to claim 1 , wherein a content of the compound A with respect to the total non-aqueous electrolyte solution is 1% by mass to 15% by mass, and a content of the compound B with respect to the total non-aqueous electrolyte solution is 0.005% by mass to 3% by mass.
3. The non-aqueous secondary battery according to claim 1 , wherein the carbon material contains a carbon material having low crystallinity.
4. The non-aqueous secondary battery according to claim 1 , wherein the content of the carbon material with respect to the total positive mixture is not more than 3% by mass.
5. The non-aqueous secondary battery according to claim 1 , wherein the content of the carbon material with respect to the total positive mixture is not more than 2.5% by mass, and the battery includes an electrode layered body with a flat winding configuration.
6. The non-aqueous secondary battery according to claim 1 , wherein a porosity of the separator is 30% to 42%.
7. The non-aqueous secondary battery according to claim 1 , wherein an air-permeability of the separator is 200 seconds/100 cm 3 to 500 seconds/100 cm 3 .
8. Portable equipment comprising a non-aqueous secondary battery,
wherein the non-aqueous secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte solution,
the non-aqueous electrolyte solution contains a compound A in which a halogen group is bonded to a benzene ring, a compound B oxidized at a potential lower than that of the compound A, and a compound having a —OSO 2 bond,
the compound B is at least one selected from an aromatic compound and a heterocyclic compound, and
when the compound B is the heterocyclic compound, the heterocyclic compound is at least one selected from the group consisting of methylpyrrole and furan.
9. The portable equipment according to claim 8 , wherein the non-aqueous secondary battery is charged at at least 0.6 A during charging.
10. The portable equipment according to claim 8 , wherein a content of the compound A with respect to the total non-aqueous electrolyte solution is 1% by mass to 15% by mass, and a content of the compound B with respect to the total non-aqueous electrolyte solution is 0.005% by mass to 3% by mass.
11. The portable equipment according to claim 8 , wherein the positive electrode contains a positive mixture, the positive mixture contains a carbon material as a conductive auxiliary agent, and a content of the carbon material with respect to the total positive mixture is not more than 5% by mass.
12. The portable equipment according to claim 11 , wherein a content of the carbon material with respect to the total positive mixture is not more than 3% by mass.
13. The portable equipment according to claim 11 , wherein the carbon material contains a carbon material having low crystallinity.
14. The portable equipment according to claim 11 , wherein a content of the carbon material with respect to the total positive mixture is not more than 3% by mass, and the carbon material contains a carbon material having low crystallinity in a ratio of not more than 50% by mass with respect to the total conductive auxiliary agent.
15. A non-aqueous secondary battery comprising a positive electrode, a negative electrode, a non-aqueous electrolyte solution, and a separator,
wherein the non-aqueous electrolyte solution contains a compound A in which a halogen group is bonded to a benzene ring and a compound B oxidized at a potential lower than that of the compound A,
the compound B is at least one selected from an aromatic compound and a heterocyclic compound,
the positive electrode contains a positive mixture, the positive mixture contains a carbon material as a conductive auxiliary agent and a content of the carbon material with respect to the total positive mixture is not more than 5% by mass,
when the compound B is the heterocyclic compound, the heterocyclic compound is at least one selected from the group consisting of methylpyrrole and furan, and
a content of the compound A with respect to the total non-aqueous electrolyte solution is 1% by mass to 10% by mass.
16. A non-aqueous secondary battery comprising a positive electrode, a negative electrode, a non-aqueous electolyte solution, and a separator,
wherein the non-aqueous electrolyte solution contains a compound A in which a halogen group is bonded to a benzene ring and a compound B oxidized at a potential lower than that of the compound A,
the compound B is at least one selected from an aromatic compound and a heterocyclic compound,
the positive electrode contains a positive mixture, the positive mixture contains a carbon material as a conductive auxiliary agent, and a content of the carbon material with respect to the total positive mixture is not more than 5% by mass,
when the compound B is the heterocyclic compound, the heterocyclic compound is at least one selected from the group consisting of methylpyrrole and furan, and
a content of the compound B with respect to the total non-aqueous electrolyte solution is 0.005% by mass to 0.5% by mass.
17. A non-aqueous secondary battery according comprising a positive electrode, a negative electrode, a non-aqueous electrolyte solution, and a separator,
wherein the non-aqueous electrolyte solution contains a compound A in which a halogen group is bonded to a benzene ring and a compound B oxidized at a potential lower than that of the compound A,
the compound B is at least one selected from an aromatic compound and a heterocyclic compound,
the positive electrode contains a positive mixture, the positive mixture contains a carbon material as a conductive auxiliary agent, and a content of the carbon material with respect to the total positive mixture as not more than 5% by mass,
when the compound B is the heterocyclic compound, the heterocyclic compound is at least one selected from the group consisting of methylpyrrole and furan, and
a content of the compound A with respect to the total non-aqueous electrolyte solution is 1% by mass to 10% by mass, and a content of the compound B with respect to the total non-aqueous electrolyte solution is (0.005% by mass to 0.5% by mass.
18. Portable equipment comprising a non-aqueous secondary battery,
wherein the non-aqueous secondary battery includes a positive electrode, a negative electrode and a non-aqueous electrolyte solution,
the non-aqueous electrolyte solution contains a compound A in which a halogen group is bonded to a benzene ring, a compound B oxidized at a potential lower than that of the compound A, and a compound having —OSO 2 bond, and
the Compound B is an aromatic compound.
19. The portable equipment according to claim 18 , wherein the aromatic compound is at least one selected from the group consisting of biphenyl, diphenylmethane, diphenylether and naphthalene.