Battery, battery pack, electronic apparatus, electrically driven vehicle, electrical storage device, and electric power system
View Patent ↗Disclosed is a battery including: a positive electrode; a negative electrode; and an electrolyte including a fluidic electrolyte in which an electrolytic solution containing a solvent and an electrolyte salt is present while maintaining fluidity, and a non-fluidic electrolyte in which an electrolytic solution containing a solvent and an electrolyte salt is supported by a polymeric material.
1. A battery comprising:
a positive electrode;
a negative electrode; and
an electrolyte including a fluidic electrolyte in which an electrolytic solution containing a solvent and an electrolyte salt is present while maintaining fluidity, and a non-fluidic electrolyte in which the electrolytic solution containing the solvent and the electrolyte salt is supported by a polymeric material, a content of the electrolytic solution in the non-fluidic electrolyte being 90 to 99 mass% with respect to the non-fluidic electrolyte.
2. The battery according to claim 1 ,
wherein the non-fluidic electrolyte is present between the positive electrode and the negative electrode, and
the fluidic electrolyte is present at least in a void inside active material layers of the positive electrode and the negative electrode.
3. The battery according to claim 2 ,
wherein the fluidic electrolyte is present between the positive electrode and the negative electrode.
4. The battery according to claim 1 ,
wherein a porous separator is interposed between the positive electrode and the negative electrode, and
the non-fluidic electrolyte is present between at least one of the positive electrode and the negative electrode, and the separator.
5. The battery according to claim 1 ,
wherein the electrolyte salt contains an imide salt compound expressed by Chem. 1,
M + [(ZY) 2 N] − (Chem. 1)
(here, M + represents a monovalent cation, Y represents SO 2 or CO, and Z represents a fluorine atom).
6. The battery according to claim 1 ,
wherein a volume ratio of the non-fluidic electrolyte with respect to the electrolyte is greater than 0 up to 6 vol %.
7. A battery comprising:
a positive electrode;
a negative electrode; and
an electrolyte including a fluidic electrolyte in which an electrolytic solution containing a solvent and an electrolyte salt is present while maintaining fluidity, and a non-fluidic electrolyte in which the electrolytic solution containing the solvent and the electrolyte salt is supported by a polymeric material,
wherein a weight-average molecular weight of the polymeric material is 500,000 or more.
8. The battery according to claim 7 ,
wherein the polymeric material is at least one of polyvinylidene fluoride and polyacrylonitrile.
9. The battery according to claim 2 ,
wherein the positive electrode active material is a lithium composite phosphate having an olivine type structure expressed by Chem. I,
Li a M1 b PO 4 (Chem. I)
(here, M1 represents at least one kind of element selected from elements of group II to group XV, and a and b represent values within ranges of 0≦a≦2.0 and 0.5≦b≦2.0).
10. The battery according to claim 9 ,
wherein the lithium composite phosphate having the olivine type structure expressed by Chem. I contains iron as M1.
11. A battery pack comprising:
the battery according to claim 1 ;
a control unit that controls the battery; and
an exterior package in which the battery is accommodated.
12. The battery according to claim 7 ,
wherein the non-fluidic electrolyte is present between the positive electrode and the negative electrode, and
the fluidic electrolyte is present at least in a void inside active material layers of the positive electrode and the negative electrode.
13. The battery according to claim 12 ,
wherein the fluidic electrolyte is present between the positive electrode and the negative electrode.
14. The battery according to claim 12 ,
wherein the positive electrode active material is a lithium composite phosphate having an olivine type structure expressed by Chem. I,
Li a M1 b PO 4 (Chem. I)
(here, M1 represents at least one kind of element selected from elements of group II to group XV, and a and b represent values within ranges of 0≦a≦2.0 and 0.5≦b≦2.0).
15. The battery according to claim 14 ,
wherein the lithium composite phosphate having the olivine type structure expressed by Chem. I contains iron as M1.
16. The battery according to claim 7 ,
wherein a porous separator is interposed between the positive electrode and the negative electrode, and
the non-fluidic electrolyte is present between at least one of the positive electrode and the negative electrode, and the separator.
17. The battery according to claim 7 ,
wherein the electrolyte salt contains an imide salt compound expressed by Chem. 1,
M + [(ZY) 2 N] − (Chem. 1)
(here, M + represents a monovalent cation, Y represents SO 2 or CO, and Z represents a fluorine atom).
18. The battery according to claim 7 ,
wherein a volume ratio of the non-fluidic electrolyte with respect to the electrolyte is greater than 0 up to 6 vol %.
19. A battery pack comprising:
the battery according to claim 7 ;
a control unit that controls the battery; and
an exterior package in which the battery is accommodated.
20. The battery according to claim 1 ,
wherein the polymeric material is at least one of polyvinylidene fluoride and polyacrylonitrile.