Electrolyte solution, method for producing electrolyte solution, and electrochemical device

Patent metadata

Field	Value
Publication number	US-9575025-B2
Application number	US-201615258408-A
Country	US
Kind code	B2
Filing date	Sep 7, 2016
Priority date	Sep 28, 2012
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

There is provided an electrolyte solution including a solvent formed from a sulfone, and a magnesium salt dissolved in the solvent.

First claim

What is claimed is:

1. A battery pack, comprising:
a secondary battery that comprises an electrolyte solution,
wherein the electrolyte solution is one of:
a first solution that includes a first solvent of a first sulfone, and a first magnesium salt dissolved in the first solvent, wherein a molar ratio of the first sulfone based on the first magnesium salt in the first solution is 4 or more to 35 or less, or
a second solution that includes a second solvent of a second sulfone and a non-polar solvent, and a second magnesium salt dissolved in the second solvent, wherein a molar ratio of the second sulfone based on the second magnesium salt in the second solution is 4 or more to 20 or less.

2. The battery pack according to claim 1 , further comprising:
a control unit configured to control the secondary battery; and
a casing configured to enclose the secondary battery.

3. The battery pack according to claim 2 , wherein the control unit is further configured to control charging/discharging, over discharging, and/or over charging of the secondary battery.

4. The battery pack according to claim 1 , wherein the first magnesium salt includes a magnesium complex that has a four-coordinate dimer structure in which the first sulfone is coordinated to a magnesium.

5. The battery pack according to claim 1 , wherein the second magnesium salt includes a magnesium complex that has a four-coordinate dimer structure in which the second sulfone is coordinated to a magnesium.

6. An electronic device, comprising:
a secondary battery that comprises an electrolyte solution, wherein the electronic device is configured to receive power from the secondary battery, and
wherein the electrolyte solution is one of:
a first solution that includes a first solvent of a first sulfone, and a first magnesium salt dissolved in the first solvent, wherein a molar ratio of the first sulfone based on the first magnesium salt in the first solution is 4 or more to 35 or less, or
a second solution that includes a second solvent of a second sulfone and a non-polar solvent, and a second magnesium salt dissolved in the second solvent, wherein a molar ratio of the second sulfone based on the second magnesium salt in the second solution is 4 or more to 20 or less.

7. An electric vehicle, comprising:
a secondary battery that comprises an electrolyte solution;
a conversion apparatus configured to:
receive power from the secondary battery; and
convert the received power into a vehicle drive force; and

a control apparatus configured to control the electric vehicle based on information of the secondary battery,
wherein the electrolyte solution is
a first solution that includes a first solvent of a first sulfone, and a first magnesium salt dissolved in the first solvent, wherein a molar ratio of the first sulfone based on the first magnesium salt in the first solution is 4 or more to 35 or less, or
a second solution that includes a second solvent of a second sulfone and a non-polar solvent, and a second magnesium salt dissolved in the second solvent, wherein a molar ratio of the second sulfone based on the second magnesium salt in the second solution is 4 or more to 20 or less.

8. The electric vehicle according to claim 7 , wherein the conversion apparatus is further configured to rotate a motor, to generate the vehicle drive force, based on the power received from the secondary battery.

9. The electric vehicle according to claim 8 , wherein the motor is configured to utilize regenerative energy.

10. The electric vehicle according to claim 7 , wherein the control apparatus is further configured to control the electric vehicle based on a battery level that remains in the secondary battery.

11. The electric vehicle according to claim 7 , wherein the electric vehicle is one of an electric automobile, an electric motorbike, an electric bicycle, a railroad wagon or a hybrid automobile.

12. A power system, comprising:
a secondary battery that comprises an electrolyte solution, wherein the power system is configured to one of receive power from a secondary battery or supply power to the secondary battery,
wherein the electrolyte solution is one of:
a first solution that includes a first solvent of a first sulfone, and a first magnesium salt dissolved in the first solvent, wherein a molar ratio of the first sulfone based on the first magnesium salt in the first solution is 4 or more to 35 or less, or
a second solution that includes a second solvent of a second sulfone and a non-polar solvent, and a second magnesium salt dissolved in the second solvent, wherein a molar ratio of the second sulfone based on the second magnesium salt in the second solution is 4 or more to 20 or less.

13. The power system according to claim 12 , wherein the power system is one of a smart grid or a household energy management system (HEMS).

14. A power storage power source, comprising:
a secondary battery that comprises an electrolyte solution,
wherein the power storage power source is configured to supply power to an electronic device, and
wherein the electrolyte solution is one of:
a first solution that includes a first solvent of a first sulfone, and a first magnesium salt dissolved in the first solvent, wherein a molar ratio of the first sulfone based on the first magnesium salt in the first solution is 4 or more to 35 or less, or

a second solution that includes a second solvent of a second sulfone and a non-polar solvent, and a second magnesium salt dissolved in the second solvent, wherein a molar ratio of the second sulfone based on the second magnesium salt in the second solution is 4 or more to 20 or less.

Assignees

• Sony Corp

Inventors

• Nakayama Yuri
• Kawasaki Hideki
• Morioka Hiroyuki

Classifications

• H01M10/0568

  characterised by the solutes · CPC title

• H01M12/08

  composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type · CPC title

• H01G9/035

  Liquid electrolytes, e.g. impregnating materials (H01G11/54 takes precedence) · CPC title

• H01M8/02

  Details (electrodes H01M4/86 - H01M4/98) · CPC title

• G01N27/26 Primary

  by investigating electrochemical variables; by using electrolysis or electrophoresis · CPC title