Electrolytic solution for lithium-ion secondary battery, and lithium-ion secondary battery

Patent metadata

Field	Value
Publication number	US-12095036-B2
Application number	US-202117221402-A
Country	US
Kind code	B2
Filing date	Apr 2, 2021
Priority date	Oct 5, 2018
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

A lithium-ion secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The electrolytic solution includes a solvent, an electrolyte salt, and at least one of a first dioxane compound or a second dioxane compound.

First claim

The invention claimed is:

1. A lithium-ion secondary battery comprising:
a positive electrode;
a negative electrode; and
an electrolytic solution that includes: a solvent; an electrolyte salt; and at least one of a first dioxane compound or a second dioxane compound,
wherein the first dioxane compound is represented by Formula (1), and the second dioxane compound is represented by Formula (2),

wherein
each of R1 to R10 includes a hydrogen group or a monovalent hydrocarbon group, and
X includes a divalent hydrocarbon group, and

wherein
each of R11 to R16 includes a hydrogen group or a monovalent hydrocarbon group, and
Y includes a divalent hydrocarbon group, and
wherein
a content of the first dioxane compound in the electrolytic solution is from 0.001 weight percent to 5 weight percent, and
a content of the second dioxane compound in the electrolytic solution is from 0.001 weight percent to 5 weight percent.

2. The lithium-ion secondary battery according to claim 1 , wherein
the monovalent hydrocarbon group includes one of an alkyl group, an alkenyl group, and an alkynyl group, and has carbon number of less than or equal to 4, and
the divalent hydrocarbon group includes one of an alkylene group, an alkenylene group, and an alkynylene group, and has carbon number of less than or equal to 4.

3. The lithium-ion secondary battery according to claim 2 , wherein
the solvent includes at least one of an unsaturated cyclic carbonate ester, a halogenated carbonate ester, or a dinitrile compound, and
the electrolyte salt includes at least one of lithium tetrafluoroborate (LiBF 4 ), lithium difluorophosphate (LiPF 2 O 2 ), or lithium bis(oxalato)borate (LiC 4 BO 8 ).

4. The lithium-ion secondary battery according to claim 3 , wherein the negative electrode includes one or both of a carbon material and a silicon-containing material.

5. The lithium-ion secondary battery according to claim 2 , wherein the negative electrode includes one or both of a carbon material and a silicon-containing material.

6. The lithium-ion secondary battery according to claim 1 , wherein
the solvent includes at least one of an unsaturated cyclic carbonate ester, a halogenated carbonate ester, or a dinitrile compound, and
the electrolyte salt includes at least one of lithium tetrafluoroborate (LiBF 4 ), lithium difluorophosphate (LiPF 2 O 2 ), or lithium bis(oxalato)borate (LiC 4 BO 8 ).

7. The lithium-ion secondary battery according to claim 6 , wherein the negative electrode includes one or both of a carbon material and a silicon-containing material.

8. The lithium-ion secondary battery according to claim 1 , wherein the negative electrode includes one or both of a carbon material and a silicon-containing material.

9. An electrolytic solution for a lithium-ion secondary battery, the electrolytic solution comprising:
a solvent;
an electrolyte salt; and
at least one of a first dioxane compound or a second dioxane compound,
wherein the first dioxane compound is represented by Formula (1), and the second dioxane compound is represented by Formula (2),

wherein
each of R1 to R10 includes a hydrogen group or a monovalent hydrocarbon group, and
X includes a divalent hydrocarbon group,

wherein
each of R11 to R16 includes a hydrogen group or a monovalent hydrocarbon group, and
Y includes a divalent hydrocarbon group, and
wherein
a content of the first dioxane compound in the electrolytic solution is from 0.001 weight percent to 5 weight percent, and
a content of the second dioxane compound in the electrolytic solution is from 0.001 weight percent to 5 weight percent.

Assignees

• Murata Manufacturing Co

Inventors

• Odani Toru
• Nagata Yoshihide

Classifications

• H01M2300/0025

  Organic electrolyte · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01M10/0569

  characterised by the solvents · CPC title

• H01M10/0568

  characterised by the solutes · CPC title

• H01M10/0525

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