NON-AQUEOUS SOLVENT AND NON-AQUEOUS ELECTROLYTIC SOLUTION FOR ENERGY STORAGE DEVICE, AND ENERGY STORAGE DEVICE, LITHIUM SECONDARY BATTERY AND ELECTRIC DOUBLE-LAYER CAPACITOR EACH COMPRISING THE NON-AQUEOUS SOLVENT OR THE NON-AQUEOUS ELECTROLYTIC SOLUTION

• US 20110171540A1
• Filed: 10/20/2009
• Published: 07/14/2011
• Est. Priority Date: 10/21/2008
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Takeuchi, Takashi, Hasegawa, Masaki
• Granted Patent: US 8,247,118 B2
• Time in Patent Office: Days
• US Class Current: 429/342
• CPC Class Codes: H01G 11/06 with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
• CPC Class Codes: H01G 11/60 characterised by the solvent
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/0569 characterised by the solvents
• CPC Class Codes: H01M 10/4235 Safety or regulating additives or arrangements in electrodes, separators or electrolyte H01M10/4242 takes precedence
• CPC Class Codes: H01M 2300/0025 Organic electrolyte
• CPC Class Codes: H01M 2300/0034 Fluorinated solvents
• CPC Class Codes: H01M 2300/0037 Mixture of solvents
• CPC Class Codes: H01M 6/164 by the solvent
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors

Abstract

A nonaqueous solvent for an electrical storage device according to the present invention includes fluorine-containing cyclic saturated hydrocarbon having a structure represented by the following general formula (1) in which one or two substituents R are introduced into a cyclohexane ring; a compound having a relative dielectric constant of 25 or higher; and a chain carbonate (in general formula (1), R is represented by C_nX_2n+1 where n is an integer of 1 or greater, at least one of (2n+1) pieces of X'"'"'s is F, and the other X'"'"'s are H).

Claims

1. A nonaqueous solvent for an electrical storage device, comprising:

fluorine-containing cyclic saturated hydrocarbon having a structure represented by the following general formula (1) in which one or two substituents R are introduced into a cyclohexane ring;

a compound having a relative dielectric constant of 25 or higher; and

a chain carbonate (in general formula (1), R is represented by C_nX_2n+1 where n is an integer of 1 or greater, at least one of (2n+1) pieces of X'"'"'s is F, and the other X'"'"'s are H).

2. The nonaqueous solvent for an electrical storage device of claim 1, wherein n is 1 or 2.

3. The nonaqueous solvent for an electrical storage device of claim 2, wherein the fluorine-containing cyclic saturated hydrocarbon is trifluoromethylcyclohexane.

4. The nonaqueous solvent for an electrical storage device of claim 2, wherein the fluorine-containing cyclic saturated hydrocarbon is 1,2-bis(trifluoromethyl)cyclohexane.

5. The nonaqueous solvent for an electrical storage device of claim 2, wherein the fluorine-containing cyclic saturated hydrocarbon is (2-fluoroethyl)cyclohexane.

6. The nonaqueous solvent for an electrical storage device of claim 1, wherein the compound having a relative dielectric constant of 25 or higher is a cyclic carbonate or a cyclic sulfone.

7. A nonaqueous electrolytic solution for an electrical storage device, comprising:

the nonaqueous solvent for an electrical storage device defined by claim 1; and

a support electrolyte salt.

8. The nonaqueous electrolytic solution for an electrical storage device of claim 7, wherein the support electrolyte salt is a lithium salt.

9. The nonaqueous electrolytic solution for an electrical storage device of claim 7, wherein the support electrolyte salt is a quaternary ammonium salt.

10. An electrical storage device, comprising the nonaqueous solvent for an electrical storage device defined by claim 1.

11. A lithium ion secondary battery, comprising the nonaqueous electrolytic solution for an electrical storage device defined by claim 7.

12. An electric double layer capacitor, comprising the nonaqueous electrolytic solution for an electrical storage device defined by claim 7.