Electrolytic solution and electrochemical device

Patent metadata

Field	Value
Publication number	US-10879566-B2
Application number	US-201515320350-A
Country	US
Kind code	B2
Filing date	Apr 20, 2015
Priority date	Jul 8, 2014
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

An electrolytic solution includes a sulfone and a magnesium salt dissolved in the sulfone, in which the magnesium salt includes magnesium borohydride (Mg(BH4)2).

First claim

What is claimed is:

1. An electrolytic solution consisting of:
a sulfone; and
a magnesium salt dissolved in the sulfone, wherein the magnesium salt comprises magnesium borohydride;
wherein the sulfone is at least one alkyl sulfone represented by R 1 R 2 SO 2 , wherein R 1 and R 2 each represent an alkyl group; or an alkyl sulfone derivative,
wherein the at least one alkyl sulfone is a methyl n-propyl sulfone, a methyl isopropyl sulfone, a methyl n-butyl sulfone, a methyl isobutyl sulfone, a methyl sec-butyl sulfone, a methyl tert-butyl sulfone, an ethyl methyl sulfone, an ethyl n-propyl sulfone, an ethyl isopropyl sulfone, an ethyl n-butyl sulfone, an ethyl isobutyl sulfone, an ethyl sec-butyl sulfone, an ethyl tert-butyl sulfone, a n-propyl n-butyl sulfone, a n-butyl ethyl sulfone, an isobutyl ethyl sulfone, or a sec-butyl ethyl sulfone, and
wherein the alkyl sulfone derivative is ethyl phenyl sulfone.

2. The electrolyte solution of claim 1 , wherein the at least one alkyl sulfone is the ethyl n-propyl sulfone.

3. The electrolyte solution of claim 1 , wherein the at least one alkyl sulfone is the alkyl sulfone derivative.

4. The electrolyte solution of claim 1 , wherein the magnesium salt does not contain a halide.

5. The electrolyte solution of claim 1 , wherein a molar ratio of the sulfone to the magnesium borohydride is between about 50 and about 150.

6. The electrolyte solution of claim 5 , wherein the molar ratio of the sulfone to the magnesium borohydride is between about 60 and about 120.

7. The electrolyte solution of claim 1 , wherein undissolved magnesium salt is removed from the sulfone in the electrolytic solution.

8. The electrolyte solution of claim 1 , wherein the magnesium salt is magnesium borohydride.

9. An electrochemical device comprising:
an electrolytic solution, wherein the electrolytic solution consists of:

a sulfone; and
a magnesium salt dissolved in the sulfone, wherein the magnesium salt comprises magnesium borohydride;
wherein the sulfone is at least one alkyl sulfone represented by R 1 R 2 SO 2 , wherein R 1 and R 2 each represent an alkyl group, or an alkyl sulfone derivative,
wherein the at least one alkyl sulfone is a methyl n-propyl sulfone, a methyl isopropyl sulfone, a methyl n-butyl sulfone, a methyl isobutyl sulfone, a methyl sec-butyl sulfone, a methyl tert-butyl sulfone, an ethyl methyl sulfone, an ethyl n-propyl sulfone, an ethyl isopropyl sulfone, an ethyl n-butyl sulfone, an ethyl isobutyl sulfone, an ethyl sec-butyl sulfone, an ethyl tert-butyl sulfone, a n-propyl n-butyl sulfone, a n-butyl ethyl sulfone, an isobutyl ethyl sulfone, or a sec-butyl ethyl sulfone, and
wherein the alkyl sulfone derivative is ethyl phenyl sulfone.

10. The electrochemical device of claim 9 , wherein the electrochemical device is a battery having an electrolyte layer comprising the electrolytic solution.

11. The electrochemical device of claim 9 , further comprising at least one of a capacitor, a sensor or a magnesium ion filter.

12. The electrochemical device of claim 10 , wherein the battery further comprises a positive electrode comprising a sulfur, a graphite fluoride, an oxide, or a halide.

13. The electrochemical device of claim 12 , wherein the oxide or the halide comprises a metal comprising scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, or zinc.

14. The electrochemical device of claim 9 , wherein the at least one alkyl sulfone is the ethyl n-propyl sulfone.

15. The electrochemical device of claim 9 , wherein a molar ratio of the sulfone to the magnesium borohydride is between about 50 and about 150.

16. The electrochemical device of claim 15 , wherein the molar ratio of the sulfone to the magnesium borohydride is between about 60 and about 120.

17. The electrochemical device of claim 9 , wherein the magnesium salt does not contain a halide.

18. The electrochemical device of claim 9 , wherein the magnesium salt is magnesium borohydride.

19. The electrochemical device of claim 9 , further comprising a negative electrode, wherein the negative electrode comprises a magnesium, a magnesium alloy, or a magnesium compound.

20. The electrochemical device of claim 9 , wherein the at least one alkyl sulfone is the alkyl sulfone derivative.

21. A battery comprising:
a negative electrode;
a positive electrode; and
an electrolytic solution, wherein the electrolytic solution consists of:
a sulfone; and
a magnesium salt dissolved in the sulfone, wherein the magnesium salt comprises magnesium borohydride;
wherein the sulfone is at least one alkyl sulfone represented by R 1 R 2 SO 2 , wherein R 1 and R 2 each represent an alkyl group, or an alkyl sulfone derivative,
wherein the at least one alkyl sulfone is a methyl n-propyl sulfone, a methyl isopropyl sulfone, a methyl n-butyl sulfone, a methyl isobutyl sulfone, a methyl sec-butyl sulfone, a methyl tert-butyl sulfone, an ethyl methyl sulfone, an ethyl n-propyl sulfone, an ethyl isopropyl sulfone, an ethyl n-butyl sulfone, an ethyl isobutyl sulfone, an ethyl sec-butyl sulfone, an ethyl tert-butyl sulfone, a n-propyl n-butyl sulfone, a n-butyl ethyl sulfone, an isobutyl ethyl sulfone, or a sec-butyl ethyl sulfone, and
wherein the alkyl sulfone derivative is ethyl phenyl sulfone.

22. The battery of claim 21 , wherein the negative electrode comprises a magnesium, a magnesium alloy, or a magnesium compound.

23. The battery of claim 21 , wherein the at least one alkyl sulfone is the ethyl n-propyl sulfone.

24. The battery of claim 21 , wherein the negative electrode comprises an electrolyte layer comprising the electrolytic solution.

Assignees

• Murata Manufacturing Co

Inventors

• Nakayama Yuri
• Matsumoto Ryuhei
• Kawasaki Hideki

Classifications

• H01G11/60 Primary

  characterised by the solvent · CPC title

• H01M8/18

  Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells · CPC title

• H01M12/06

  with one metallic and one gaseous electrode · CPC title

• H01M6/16

  with organic electrolyte (H01M6/18 takes precedence) · CPC title

• Y02E60/13

  Energy storage using capacitors · CPC title