Nonaqueous secondary battery
Provided is a nonaqueous secondary battery including: a positive electrode that contains at least one positive electrode active material capable of occluding and releasing lithium ions; a negative electrode that contains a negative electrode active material which is at least one selected from the group consisting of lithium metals and materials capable of occluding and releasing lithium ions; and a nonaqueous electrolytic solution, wherein the negative electrode contains at least one compound selected from the group consisting of compounds represented by general formulas (1)-(3).
1. A nonaqueous secondary battery comprising:
a positive electrode containing one or more positive electrode active materials capable of occluding and releasing lithium ions;
a negative electrode containing a negative electrode active material which is at least one selected from the group consisting of a carbon material capable of occluding and releasing lithium ions, and a Si material-containing carbon material; and
a nonaqueous electrolyte solution; wherein
a surface of the negative electrode is coated with at least one compound selected from the group consisting of compounds represented by the following general formula (1):
the following general formula (2):
and the following general formula (3):
wherein a content of at least one compound selected from the group consisting of the compounds represented by the general formulas (1) to (3) is 0.1 to 10 mg as an amount per 1 g of the negative electrode active material,
wherein a sum of contents of the compounds represented by the general formulas (2) and (3) is 0.01 to 2.5 mg as an amount per 1 g of the negative electrode active material,
wherein the nonaqueous electrolyte solution contains acetonitrile, and
wherein a content of acetonitrile is 5% by volume or more and 95% by volume or less as an amount per total amount of the nonaqueous electrolyte solution.
2. The nonaqueous secondary battery according to claim 1 , wherein the nonaqueous electrolyte solution contains a fluorine-containing lithium salt.
3. The nonaqueous secondary battery according to claim 2 , wherein the nonaqueous electrolyte solution contains an imide salt represented by LiN(SO 2 C m F 2m+1 ) 2 wherein m is an integer of 0 to 8.
4. The nonaqueous secondary battery according to claim 2 , wherein the negative electrode contains PF 6 anions.
5. The nonaqueous secondary battery according to claim 3 , wherein the negative electrode contains N(SO 2 F) 2 anions and/or N(SO 2 CF 3 ) 2 anions.
6. The nonaqueous secondary battery according to claim 3 , wherein the negative electrode contains a decomposition product of a cyclic acid anhydride, and the decomposition product of the cyclic acid anhydride contains at least one compound selected from the group consisting of compounds represented by the following general formula (4):
wherein R 6 and R 7 represent an alkoxy group which may be substituted with a halogen atom, an OH group or an OLi group, and f is an integer of 1 to 3;
the following general formula (5):
wherein R 1 and R 9 represent an alkoxy group which may be substituted with a halogen atom, an OH group or an OLi group;
the following general formula (6):
wherein R 10 and R 11 represent an alkoxy group which may be substituted with a halogen atom, an OH group or an OLi group;
the following general formula (7):
wherein R 12 and R 13 represent an alkoxy group which may be substituted with a halogen atom, an OH group or an OLi group;
the following general formula (8):
wherein R 14 and R 15 represent an alkoxy group which may be substituted with a halogen atom, an OH group or an OLi group; and
the following general formula (9):
wherein R 16 to R 19 represent an alkoxy group which may be substituted with a halogen atom, an OH group or an OLi group.
7. The nonaqueous secondary battery according to claim 6 , wherein the cyclic acid anhydride contains at least one selected from the group consisting of malonic anhydride, succinic anhydride, glutaric anhydride, maleic anhydride, phthalic anhydride, 1,2-cyclohexanedicarboxylic anhydride, 2,3-naphthalenedicarboxylic anhydride and naphthalene-1,4,5,8-tetracarboxylic dianhydride.
8. The nonaqueous secondary battery according to claim 1 , wherein the nonaqueous electrolyte solution contains a nonaqueous solvent, and
the nonaqueous solvent contains a cyclic carbonate, and
the cyclic carbonate contains vinylene carbonate and/or fluoroethylene carbonate.
9. The nonaqueous secondary battery according to claim 1 , wherein the negative electrode active material contains:
at least one element capable of forming an alloy with lithium; and/or
silicon.
10. The nonaqueous secondary battery according to claim 1 , wherein the nonaqueous electrolyte solution has an ionic conductivity at 20° C. of 15 mS/cm or more.
11. The nonaqueous secondary battery according to claim 1 , wherein a separator used in the nonaqueous secondary battery has a thickness of 3 μm or more and 25 μm or less; a porosity of 40% or more and 70% or less; and/or an air permeability of 100 s/100 cm 3 or more and 350 s/100 cm 3 or less.
12. The nonaqueous secondary battery according to claim 1 , wherein the nonaqueous electrolyte solution contains at least one nitric acid compound selected from the group consisting of a nitrate and a nitric acid ester.
13. The nonaqueous secondary battery according to claim 1 , wherein the nonaqueous electrolyte solution contains at least one additive selected from the group consisting of:
a polymer compound including a repeating unit represented by any one of the following general formula (P1):
wherein R 1 is a hydrogen atom or an alkyl group;
the following general formula (P2):
wherein n1 to n3 are the number of repeating units and each independently represent an integer of 0 to 4;
the following general formula (P3):
wherein R 2 is an alkyl group having 1 to 20 carbon atoms or a fluoroalkyl group having 1 to 20 carbon atoms; and
the following general formula (P4):
wherein R 3 is a hydrogen atom or an alkyl group having 1 to 20 carbon atoms; and
a carboxylic acid ester compound.
14. The nonaqueous secondary battery according to claim 1 , wherein the nonaqueous electrolyte solution contains at least one additive selected from the group consisting of an organometal hydride and a dicarbonate compound.
15. The nonaqueous secondary battery according to claim 1 , wherein the nonaqueous electrolyte solution contains a silyl group-containing additive.
16. The nonaqueous secondary battery according to claim 1 , wherein the nonaqueous electrolyte solution contains a boron atom-containing additive.
17. The nonaqueous secondary battery according to claim 3 , wherein the nonaqueous electrolyte solution contains a nonaqueous solvent,
the nonaqueous solvent contains a cyclic carbonate, and
the cyclic carbonate contains vinylene carbonate and/or fluoroethylene carbonate, and
the nonaqueous electrolyte solution contains:
at least one nitric acid compound selected from the group consisting of a nitrate and a nitric acid ester,
at least one additive selected from the group consisting of:
a polymer compound including a repeating unit represented by any one of the following general formula (P1):
wherein R 1 is a hydrogen atom or an alkyl group;
the following general formula (P2):
wherein n1 to n3 are the number of repeating units and each independently represent an integer of 0 to 4;
the following general formula (P3):
wherein R 2 is an alkyl group having 1 to 20 carbon atoms or a fluoroalkyl group having 1 to 20 carbon atoms; and
the following general formula (P4):
wherein R 3 is a hydrogen atom or an alkyl group having 1 to 20 carbon atoms; and
a carboxylic acid ester compound,
at least one additive selected from the group consisting of an organometal hydride and a dicarbonate compound,
a silyl group-containing additive, or
a boron atom-containing additive.