Cyclic sulfate compound, non-aqueous electrolyte solution containing same, and lithium secondary battery
A non-aqueous electrolyte solution containing a cyclic sulfate compound represented by formula (I) is provided, wherein in formula (I), R 1 represents a group represented by formula (II) or a group represented by formula (III); R 2 represents a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms, a group represented by formula (II), or a group represented by formula (III); and in formula (II), R 3 represents a halogen atom, an alkyl group having from 1 to 6 carbon atoms, a halogenated alkyl group having from 1 to 6 carbon atoms, an alkoxy group having from 1 to 6 carbon atoms, or a group represented by formula (IV).
1. A non-aqueous electrolyte solution, comprising:
a cyclic sulfate compound represented by the following formula (I):
wherein, in formula (I), R 1 represents a group represented by the above formula (II) or a group represented by the above formula (III); and R 2 represents a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms, a group represented by formula (II), or a group represented by formula (III);
in formula (II), R 3 represents a halogen atom, an alkyl group having from 1 to 6 carbon atoms, a halogenated alkyl group having from 1 to 6 carbon atoms, an alkoxy group having from 1 to 6 carbon atoms, or a group represented by the above formula (IV); and the wavy line in formula (II), formula (III) and formula (IV) represents the position of bonding; and
in a case in which there are two groups represented by formula (II) in the cyclic sulfate compound represented by formula (I), the two groups represented by formula (II) may be the same as or different from each other.
2. The non-aqueous electrolyte solution according to claim 1 , wherein in formula (I), R 1 represents a group represented by formula (II) (provided that in formula (II), R 3 represents a fluorine atom, an alkyl group having from 1 to 3 carbon atoms, a halogenated alkyl group having from 1 to 3 carbon atoms, an alkoxy group having from 1 to 3 carbon atoms, or a group represented by formula (IV)), or a group represented by formula (III); and R 2 represents a hydrogen atom, an alkyl group having from 1 to 3 carbon atoms, a group represented by formula (II) (provided that in formula (II), R 3 represents a fluorine atom, an alkyl group having from 1 to 3 carbon atoms, a halogenated alkyl group having from 1 to 3 carbon atoms, an alkoxy group having from 1 to 3 carbon atoms, or a group represented by formula (IV)), or a group represented by formula (III).
3. The non-aqueous electrolyte solution according to claim 2 , wherein in formula (I), R 1 represents a group represented by formula (II) (provided that in formula (II), R 3 represents a fluorine atom, a methyl group, an ethyl group, a methoxy group, an ethoxy group, or a group represented by formula (IV)), or a group represented by formula (III); and R 2 represents a hydrogen atom or a methyl group.
4. The non-aqueous electrolyte solution according to claim 3 , wherein in formula (I), R 1 represents a group represented by formula (III), and R 2 represents a hydrogen atom.
5. The non-aqueous electrolyte solution according to claim 1 , further comprising at least one of an electrolyte compound represented by the following formula (V) or lithium difluorophosphate:
wherein, in formula (V), M represents an alkali metal; Y represents a transition element, or an element of Group 13, Group 14 or Group 15 of the Periodic Table of Elements; b represents an integer from 1 to 3; m represents an integer from 1 to 4; n represents an integer from 0 to 8; q represents 0 or 1; R 11 represents an alkylene group having from 1 to 10 carbon atoms, a halogenated alkylene group having from 1 to 10 carbon atoms, an arylene group having from 6 to 20 carbon atoms, or a halogenated arylene group having from 6 to 20 carbon atoms, wherein such groups may each contain a substituent or a heteroatom in the structure, and when q is 1 and m is 2 to 4, m units of R 11 may be bonded to each other; R 12 represents a halogen atom, an alkyl group having from 1 to 10 carbon atoms, a halogenated alkyl group having from 1 to 10 carbon atoms, an aryl group having from 6 to 20 carbon atoms, a halogenated aryl group having from 6 to 20 carbon atoms, or -Q 3 R 13 , wherein such groups, other than -Q 3 R 13 , may each contain a substituent or a heteroatom in the structure, and when n represents an integer from 2 to 8, n units of R 12 may be bonded to each other to form a ring; Q 1 , Q 2 , and Q 3 each independently represent 0, S or NR 14 ; and R 13 and R 14 each independently represent a hydrogen atom, an alkyl group having from 1 to 10 carbon atoms, a halogenated alkyl group having from 1 to 10 carbon atoms, an aryl group having from 6 to 20 carbon atoms, or a halogenated aryl group having from 6 to 20 carbon atoms, wherein such groups may each contain a substituent or a heteroatom in the structure, and when plural R 13 's or plural R 14 's are present, the respective groups may be bonded to each other to form a ring.
6. The non-aqueous electrolyte solution according to claim 5 , wherein the electrolyte compound represented by formula (V) is at least one compound selected from the group consisting of a compound represented by the following formula (VI), a compound represented by the following formula (VII), a compound represented by the following formula (VIII), and a compound represented by the following formula (IX):
wherein, in formulae (VI) to (IX), M has the same definition as M in formula (V).
7. The non-aqueous electrolyte solution according to claim 1 , further comprising a compound represented by the following formula (X):
wherein, in formula (X), Y 1 and Y 2 each independently represent a hydrogen atom, a methyl group, an ethyl group, or a propyl group.
8. The non-aqueous electrolyte solution according to claim 1 , further comprising a compound represented by the following formula (XI):
wherein, in formula (XI), X 1 , X 2 , X 3 and X 4 each independently represent an alkyl group, having from 1 to 3 carbon atoms, that may be substituted with a fluorine atom; a hydrogen atom; a fluorine atom; or a chlorine atom, provided that X 1 to X 4 are not both hydrogen atoms at the same time.
9. The non-aqueous electrolyte solution according to claim 1 , wherein the content of the cyclic sulfate compound represented by formula (I) is from 0.001 mass % to 10 mass %.
10. The non-aqueous electrolyte solution according to claim 5 , wherein the content of at least one of the electrolyte compound represented by formula (V) or the lithium difluorophosphate is from 0.001 mass % to 10 mass %.
11. The non-aqueous electrolyte solution according to claim 7 , wherein the content of the compound represented by formula (X) is from 0.001 mass % to 10 mass %.
12. The non-aqueous electrolyte solution according to claim 8 , wherein the content of the compound represented by formula (XI) is from 0.001 mass % to 10 mass %.
13. An additive for a lithium secondary battery, the additive comprising a cyclic sulfate compound represented by the following formula (I) as an active ingredient:
wherein, in formula (I), R 1 represents a group represented by the above formula (II) or a group represented by the above formula (III); and R 2 represents a hydrogen atom, an alkyl group having from 1 to 6 carbon atoms, a group represented by formula (II), or a group represented by formula (III);
in formula (II), R 3 represents a halogen atom, an alkyl group having from 1 to 6 carbon atoms, a halogenated alkyl group having from 1 to 6 carbon atoms, an alkoxy group having from 1 to 6 carbon atoms, or a group represented by the above formula (IV); and the wavy line in formula (II), formula (III) and formula (IV) represents the position of bonding; and
in a case in which there are two groups represented by formula (II) in the cyclic sulfate compound represented by formula (I), the two groups represented by formula (II) may be the same as or different from each other.
14. A lithium secondary battery, comprising:
a positive electrode;
a negative electrode including, as a negative electrode active material, at least one selected from metal lithium, a lithium-containing alloy, a metal or alloy capable of alloying with lithium, an oxide capable of doping and dedoping of lithium ions, transition metal nitrides capable of doping and dedoping of lithium ions, or a carbon material capable of doping and dedoping of lithium ions; and
the non-aqueous electrolyte solution according to claim 1 .
15. A lithium secondary battery obtained by charging or discharging a lithium secondary battery that includes: a positive electrode; a negative electrode containing, as a negative electrode active material, at least one selected from metal lithium, a lithium-containing alloy, a metal or alloy capable of alloying with lithium, an oxide capable of doping and dedoping of lithium ions, transition metal nitrides capable of doping and dedoping of lithium ions, or a carbon material capable of doping and dedoping of lithium ions; and the non-aqueous electrolyte solution according to claim 1 .
16. A cyclic sulfate compound represented by the following formula (XII):
wherein, in formula (XII), R 2 represents a hydrogen atom or an alkyl group having from 1 to 6 carbon atoms; and R 3 represents a halogen atom, an alkyl group having from 1 to 6 carbon atoms, a halogenated alkyl group having from 1 to 6 carbon atoms, an alkoxy group having from 1 to 6 carbon atoms, or a group represented by formula (IV).
17. The cyclic sulfate compound according to claim 16 , wherein in formula (XII), R 2 represents a hydrogen atom or a methyl group; and R 3 represents a fluorine atom, a methyl group, an ethyl group, a methoxy group, an ethoxy group, or a group represented by formula (IV).
18. The cyclic sulfate compound according to claim 16 , which is 4-methylsulfonyloxymethyl-2,2-dioxo-1,3,2-dioxathiolane, 4-ethylsulfonyloxymethyl-2,2-dioxo-1,3,2-dioxathiolane, or bis((2,2-dioxo-1,3,2-dioxathiolane-4-yl)methyl) sulfate.