Nonaqueous electrolytic solution and nonaqueous electrolytic solution secondary battery using same

Patent metadata

Field	Value
Publication number	US-9806375-B2
Application number	US-201414468123-A
Country	US
Kind code	B2
Filing date	Aug 25, 2014
Priority date	Jan 31, 2011
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

The present invention relates to a nonaqueous electrolytic solution for use in a nonaqueous electrolytic solution secondary battery that comprises a negative electrode and a positive electrode capable of storing and releasing metal ions, and a nonaqueous electrolytic solution, wherein the nonaqueous electrolytic solution contains the specific compounds (A) and (B).

First claim

The invention claimed is:

1. A nonaqueous electrolytic solution secondary battery, comprising:
a positive electrode capable of storing and releasing metal ions;
a negative electrode consisting essentially of a carbonaceous material, a thickener, and a binder; and
a nonaqueous electrolytic solution,
wherein the nonaqueous electrolytic solution comprises a compound that does not have an aliphatic substituent having an unsaturated bond but has a Si—Si bond, and a carbonate ester having a halogen atom.

2. The secondary battery according to claim 1 , wherein the carbonate ester having a halogen atom is at least one compound selected from monofluoroethylene carbonate, 4,4-difluoroethylene carbonate, and 4,5-difluoroethylene carbonate.

3. The secondary battery according to claim 1 , wherein the compound that does not have an aliphatic substituent having an unsaturated bond but has a Si—Si bond is a compound of formula (4):

wherein A 1 to A 6 may be the same or different, and represent a hydrogen atom, a halogen atom, a hydrocarbon group of 1 to 10 carbon atoms that may have a heteroatom, or an optionally substituted hydrogen silicide group of 1 to 10 silicon atoms, and
wherein A 1 to A 6 may bind to one another to form a ring, where none of A 1 to A 6 is an aliphatic substituent having an unsaturated bond.

4. The secondary battery according to claim 1 , wherein the compound that does not have an aliphatic substituent having an unsaturated bond but has a Si—Si bond is at least one selected from the group consisting of hexamethyldisilane, hexaethyldisilane, 1,2-diphenyltetramethyldisilane, and 1,1,2,2-tetraphenyldisilane.

5. The secondary battery according to claim 1 , which comprises the compound that does not have an aliphatic substituent having an unsaturated bond but has a Si—Si bond in an amount of 0.01 mass % or more and 10 mass % or less.

6. The secondary battery according to claim 1 , wherein the carbonaceous material is graphite.

7. The secondary battery according to claim 1 , wherein the binder is present in the carbonaceous material in an amount of 0.1 to 20% by mass.

8. The secondary battery according to claim 1 , wherein the thickener is present in the carbonaceous material in an amount of 0.1 to 5% by mass.

9. The secondary battery according to claim 1 , wherein the carbonaceous material is graphite, the binder is present in the carbonaceous material in an amount of 0.1 to 20% by mass, and the thickener is present in the carbonaceous material in an amount of 0.1 to 5% by mass.

10. The secondary battery according to claim 1 , wherein the negative electrode consists of a carbonaceous material, a thickener, and a binder.

11. The secondary battery according to claim 1 , wherein
the compound that does not have an aliphatic substituent having an unsaturated bond but has a Si—Si bond is at least one selected from the group consisting of hexamethyldisilane and 1,2-diphenyltetramethyldisilane, and
the carbonate ester having a halogen atom is monofluoroethylene carbonate.

Assignees

• Mitsubishi Chem Corp

Inventors

• Yoshida Hiroaki
• Shigematsu Yasuyuki
• Kotato Minoru

Classifications

• H01M10/0567 Primary

  characterised by the additives · CPC title

• H01M2300/004

  Three solvents · CPC title

• H01M10/0525 Primary

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M10/0569

  characterised by the solvents · CPC title

• H01M4/587

  for inserting or intercalating light metals · CPC title