Electrolyte solution for secondary battery and secondary battery using the same
The present invention provides a technology of inhibiting the decomposition of the solvent of the electrolyte solution for the secondary battery. Further, the present invention provides a technology of prohibiting the resistance increase of the secondary battery and improving the storage properties such as improving the capacity retention ratio. The electrolyte solution 15 comprising non-proton solvent and cyclic sulfonic ester including at least two sulfonyl groups may be used.
1. An electrolyte solution for a secondary battery, comprising non-proton solvent and cyclic sulfonic ester including at least two sulfonyl groups.
2. The electrolyte solution for a secondary battery according to claim 1 , wherein said cyclic sulfonic ester is a compound represented by a general formula (1) described below:
(where: Q is oxygen atom, methylene group or single bond; A is substituted or non-substituted alkylene group containing 1 to 5 carbons, carbonyl group, sulfinyl group, substituted or non-substituted fluoroalkylene group containing 1 to 6 carbons or divalent group containing 2 to 6 carbons being bonded to alkylene unit or fluoroalkylene unit via ether bond; and B is substituted or non-substituted alkylene group, substituted or non-substituted fluoroalkylene group or oxygen atom).
3. The electrolyte solution for the secondary battery according to claim 2 , wherein said compound represented by a general formula (1) is cyclic disulfonic ester represented by the following general formula (2):
(where: x is 0 or 1; n is an integer from 1 to 5; and R is hydrogen atom, methyl group, ethyl group or halogen atom).
4. The electrolyte solution for the secondary battery according to claim 2 , wherein said compound represented by a general formula (1) is cyclic disulfonic ester represented by the following general formula (3):
(where: x is 0 or 1; n is an integer from 1 to 5; and R is hydrogen atom, methyl group, ethyl group or halogen atom).
5. The electrolyte solution for the secondary battery according to claim 2 , wherein said compound represented by a general formula (1) is cyclic disulfonic ester represented by the following general formula (4):
(where: x is 0 or 1; m is 1 or 2; n is an integer from 1 to 4; and R is hydrogen atom, methyl group, ethyl group or halogen atom).
6. The electrolyte solution for the secondary battery according to claim 2 , wherein said compound represented by a general formula (1) is cyclic disulfonic ester represented by the following general formula (5):
(where: x is 0 or 1; m is 1 or 2; n is an integer from 1 to 4; and R is hydrogen atom, methyl group, ethyl group or halogen atom).
7. The electrolyte solution for the secondary battery according to claim 2 , wherein said compound represented by a general formula (1) is cyclic disulfonic ester represented by the following general formula (6):
(where: x is 0 or 1; m is 1 or 2; n is an integer from 1 to 4; and R is hydrogen atom, methyl group, ethyl group or halogen atom).
8. The electrolyte solution for the secondary battery according to claim 2 , wherein said compound represented by a general formula (1) is cyclic disulfonic ester represented by the following general formula (7):
(where: x is 0 or 1; m is 1 or 2; n is an integer from 1 to 4; and R is hydrogen atom, methyl group, ethyl group or halogen atom).
9. The electrolyte solution for the secondary battery according to claim 1 , further comprising a compound having at least one sulfonyl group, in addition to said cyclic sulfonic ester.
10. The electrolyte solution for the secondary battery according to claim 9 , wherein said compound having at least one sulfonyl group is included at a weight ratio over said cyclic sulfonic ester of 0.01 to 100.
11. The electrolyte solution for the secondary battery according to claim 9 , wherein said compound having at least one sulfonyl group is a compound represented by the following general formula (8):
(where: Z is substituted or non-substituted alkylene group containing 2 to 4 carbons, substituted or non-substituted alkenylene group containing 2 to 4 carbons, substituted or non-substituted aromatic cyclic group or substituted or non-substituted hetero cyclic group).
12. The electrolyte solution for the secondary battery according to claim 9 , wherein said compound having at least one sulfonyl group is a sultone compound represented by the following general formula (9):
(where: n is an integer from 0 to 2; and R 1 to R 6 is separately selected from the group consisting of hydrogen atom, alky group containing 1 to 12 carbons, cycloalkyl group containing 3 to 6 carbons and aryl group containing 6 to 12 carbons).
13. The electrolyte solution for the secondary battery according to claim 1 , further comprising imide anion and transition metal ion.
14. The electrolyte solution for the secondary battery according to claim 13 , wherein said transition metal ion is lanthanoid transition metal ion.
15. The electrolyte solution for the secondary battery according to claim 14 , wherein said lanthanoid transition metal ion is selected from the group consisting of: europium ion; neodymium ion; erbium ion; and holmium ion.
16. The electrolyte solution for the secondary battery according to claim 13 , wherein said imide anion is represented by − N(C n F 2n+1 SO 2 )(C m F 2m+1 SO 2 ) (where each of n and m is independently an integer of 1 to 6).
17. The electrolyte solution for the secondary battery according to claim 13 , wherein said imide anion or metal complex thereof is included in said electrolyte solution at a concentration of 0.005% wt. to 10% wt.
18. The electrolyte solution for the secondary battery according to claim 1 , further comprising metal complex of imide anion and transition metal ion.
19. The electrolyte solution for the secondary battery according to claim 1 , wherein said cyclic sulfonic ester is included in said electrolyte solution at a concentration of 0.005% wt. to 10% wt.
20. The electrolyte solution for the secondary battery according to claim 1 , further comprising vinylene carbonate or derivatives thereof.
21. The electrolyte solution for the secondary battery according to claim 1 , wherein said non-proton solvent includes one or more solvent(s) selected from the group consisting of: cyclic carbonates; linear carbonates; aliphatic carboxylic acid esters; γ-lactones; cyclic ethers; linear ethers; and fluoro-derivatives thereof.
22. The electrolyte solution for the secondary battery according to claim 1 , further comprising lithium salt(s), which is one or more compound(s) selected from the group consisting of: LiPF 6 ; LiBF 4 ; LiAsF 6 ; LiSbF 6 ; LiClO 4 ; LiAlCl 4 ; and LiN(C n F 2n+1 SO 2 )(C m F 2m+1 SO 2 ) (where: n and m are integer numbers).
23. A secondary battery comprising at least a cathode and an anode, said secondary battery including the electrolyte solution according to claim 1 .
24. The secondary battery according to claim 23 , further comprising a cathode active material of lithium-containing combined oxide.
25. The secondary battery according to claim 23 , further comprising an anode active material of one or more material(s) selected from the group consisting of: a material being capable of intercalating and deintercalating lithium; a metallic lithium; a lithium alloy; and a metal material being capable of forming an alloy with lithium.
26. The secondary battery according to claim 25 , wherein said anode active material contains a carbon material.
27. The secondary battery according to claim 26 , wherein said carbon material is graphite.
28. The secondary battery according to claim 26 , wherein said carbon material is amorphous carbon.
29. The secondary battery according to claim 23 , further comprising a film packaging.